// // MWPhotoBrowser.m // MWPhotoBrowser // // Created by Michael Waterfall on 14/10/2010. // Copyright 2010 d3i. All rights reserved. // #import #import "MWCommon.h" #import "MWPhotoBrowser.h" #import "MWPhotoBrowserPrivate.h" #import "EMSDImageCache.h" #import "EaseLocalDefine.h" #define PADDING 10 #define ACTION_SHEET_OLD_ACTIONS 2000 @implementation MWPhotoBrowser #pragma mark - Init - (id)init { if ((self = [super init])) { [self _initialisation]; } return self; } - (id)initWithDelegate:(id )delegate { if ((self = [self init])) { _delegate = delegate; } return self; } - (id)initWithPhotos:(NSArray *)photosArray { if ((self = [self init])) { _depreciatedPhotoData = photosArray; } return self; } - (id)initWithCoder:(NSCoder *)decoder { if ((self = [super initWithCoder:decoder])) { [self _initialisation]; } return self; } - (void)_initialisation { // Defaults NSNumber *isVCBasedStatusBarAppearanceNum = [[NSBundle mainBundle] objectForInfoDictionaryKey:@"UIViewControllerBasedStatusBarAppearance"]; if (isVCBasedStatusBarAppearanceNum) { _isVCBasedStatusBarAppearance = isVCBasedStatusBarAppearanceNum.boolValue; } else { _isVCBasedStatusBarAppearance = YES; // default } #if __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_7_0 if (SYSTEM_VERSION_LESS_THAN(@"7")) self.wantsFullScreenLayout = YES; #endif self.hidesBottomBarWhenPushed = YES; _hasBelongedToViewController = NO; _photoCount = NSNotFound; _previousLayoutBounds = CGRectZero; _currentPageIndex = 0; _previousPageIndex = NSUIntegerMax; _displayActionButton = YES; _displayNavArrows = NO; _zoomPhotosToFill = YES; _performingLayout = NO; // Reset on view did appear _rotating = NO; _viewIsActive = NO; _enableGrid = YES; _startOnGrid = NO; _enableSwipeToDismiss = YES; _delayToHideElements = 5; _visiblePages = [[NSMutableSet alloc] init]; _recycledPages = [[NSMutableSet alloc] init]; _photos = [[NSMutableArray alloc] init]; _thumbPhotos = [[NSMutableArray alloc] init]; _currentGridContentOffset = CGPointMake(0, CGFLOAT_MAX); _didSavePreviousStateOfNavBar = NO; if ([self respondsToSelector:@selector(automaticallyAdjustsScrollViewInsets)]){ self.automaticallyAdjustsScrollViewInsets = NO; } // Listen for MWPhoto notifications [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(handleMWPhotoLoadingDidEndNotification:) name:MWPHOTO_LOADING_DID_END_NOTIFICATION object:nil]; } - (void)dealloc { _pagingScrollView.delegate = nil; [[NSNotificationCenter defaultCenter] removeObserver:self]; [self releaseAllUnderlyingPhotos:NO]; [[EMSDImageCache sharedImageCache] clearMemory]; // clear memory } - (void)releaseAllUnderlyingPhotos:(BOOL)preserveCurrent { // Create a copy in case this array is modified while we are looping through // Release photos NSArray *copy = [_photos copy]; for (id p in copy) { if (p != [NSNull null]) { if (preserveCurrent && p == [self photoAtIndex:self.currentIndex]) { continue; // skip current } [p unloadUnderlyingImage]; } } // Release thumbs copy = [_thumbPhotos copy]; for (id p in copy) { if (p != [NSNull null]) { [p unloadUnderlyingImage]; } } } - (void)didReceiveMemoryWarning { // Release any cached data, images, etc that aren't in use. [self releaseAllUnderlyingPhotos:YES]; [_recycledPages removeAllObjects]; // Releases the view if it doesn't have a superview. [super didReceiveMemoryWarning]; } #pragma mark - View Loading // Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { // Validate grid settings if (_startOnGrid) _enableGrid = YES; if (_enableGrid) { _enableGrid = [_delegate respondsToSelector:@selector(photoBrowser:thumbPhotoAtIndex:)]; } if (!_enableGrid) _startOnGrid = NO; // View self.view.backgroundColor = [UIColor blackColor]; self.view.clipsToBounds = YES; // Setup paging scrolling view CGRect pagingScrollViewFrame = [self frameForPagingScrollView]; _pagingScrollView = [[UIScrollView alloc] initWithFrame:pagingScrollViewFrame]; _pagingScrollView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight; _pagingScrollView.pagingEnabled = YES; _pagingScrollView.delegate = self; _pagingScrollView.showsHorizontalScrollIndicator = NO; _pagingScrollView.showsVerticalScrollIndicator = NO; _pagingScrollView.backgroundColor = [UIColor blackColor]; _pagingScrollView.contentSize = [self contentSizeForPagingScrollView]; [self.view addSubview:_pagingScrollView]; // Toolbar _toolbar = [[UIToolbar alloc] initWithFrame:[self frameForToolbarAtOrientation:self.interfaceOrientation]]; _toolbar.tintColor = SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7") ? [UIColor whiteColor] : nil; if ([_toolbar respondsToSelector:@selector(setBarTintColor:)]) { _toolbar.barTintColor = nil; } if ([[UIToolbar class] respondsToSelector:@selector(appearance)]) { [_toolbar setBackgroundImage:nil forToolbarPosition:UIToolbarPositionAny barMetrics:UIBarMetricsDefault]; [_toolbar setBackgroundImage:nil forToolbarPosition:UIToolbarPositionAny barMetrics:UIBarMetricsLandscapePhone]; } _toolbar.barStyle = UIBarStyleBlackTranslucent; _toolbar.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleWidth; // Toolbar Items if (self.displayNavArrows) { NSString *arrowPathFormat; if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7")) { arrowPathFormat = @"MWPhotoBrowser.bundle/images/UIBarButtonItemArrowOutline%@.png"; } else { arrowPathFormat = @"MWPhotoBrowser.bundle/images/UIBarButtonItemArrow%@.png"; } _previousButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:[NSString stringWithFormat:arrowPathFormat, @"Left"]] style:UIBarButtonItemStylePlain target:self action:@selector(gotoPreviousPage)]; _nextButton = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:[NSString stringWithFormat:arrowPathFormat, @"Right"]] style:UIBarButtonItemStylePlain target:self action:@selector(gotoNextPage)]; } if (self.displayActionButton) { _actionButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action:@selector(actionButtonPressed:)]; } // Update [self reloadData]; // Swipe to dismiss if (_enableSwipeToDismiss) { UISwipeGestureRecognizer *swipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(doneButtonPressed:)]; swipeGesture.direction = UISwipeGestureRecognizerDirectionDown | UISwipeGestureRecognizerDirectionUp; [self.view addGestureRecognizer:swipeGesture]; } // Super [super viewDidLoad]; } - (void)performLayout { // Setup _performingLayout = YES; NSUInteger numberOfPhotos = [self numberOfPhotos]; // Setup pages [_visiblePages removeAllObjects]; [_recycledPages removeAllObjects]; // Navigation buttons if ([self.navigationController.viewControllers objectAtIndex:0] == self) { // We're first on stack so show done button _doneButton = [[UIBarButtonItem alloc] initWithTitle:NSEaseLocalizedString(@"Done", nil) style:UIBarButtonItemStylePlain target:self action:@selector(doneButtonPressed:)]; // Set appearance if ([UIBarButtonItem respondsToSelector:@selector(appearance)]) { [_doneButton setBackgroundImage:nil forState:UIControlStateNormal barMetrics:UIBarMetricsDefault]; [_doneButton setBackgroundImage:nil forState:UIControlStateNormal barMetrics:UIBarMetricsLandscapePhone]; [_doneButton setBackgroundImage:nil forState:UIControlStateHighlighted barMetrics:UIBarMetricsDefault]; [_doneButton setBackgroundImage:nil forState:UIControlStateHighlighted barMetrics:UIBarMetricsLandscapePhone]; [_doneButton setTitleTextAttributes:[NSDictionary dictionary] forState:UIControlStateNormal]; [_doneButton setTitleTextAttributes:[NSDictionary dictionary] forState:UIControlStateHighlighted]; } self.navigationItem.rightBarButtonItem = _doneButton; } else { // We're not first so show back button UIViewController *previousViewController = [self.navigationController.viewControllers objectAtIndex:self.navigationController.viewControllers.count-2]; NSString *backButtonTitle = previousViewController.navigationItem.backBarButtonItem ? previousViewController.navigationItem.backBarButtonItem.title : previousViewController.title; UIBarButtonItem *newBackButton = [[UIBarButtonItem alloc] initWithTitle:backButtonTitle style:UIBarButtonItemStylePlain target:nil action:nil]; // Appearance if ([UIBarButtonItem respondsToSelector:@selector(appearance)]) { [newBackButton setBackButtonBackgroundImage:nil forState:UIControlStateNormal barMetrics:UIBarMetricsDefault]; [newBackButton setBackButtonBackgroundImage:nil forState:UIControlStateNormal barMetrics:UIBarMetricsLandscapePhone]; [newBackButton setBackButtonBackgroundImage:nil forState:UIControlStateHighlighted barMetrics:UIBarMetricsDefault]; [newBackButton setBackButtonBackgroundImage:nil forState:UIControlStateHighlighted barMetrics:UIBarMetricsLandscapePhone]; [newBackButton setTitleTextAttributes:[NSDictionary dictionary] forState:UIControlStateNormal]; [newBackButton setTitleTextAttributes:[NSDictionary dictionary] forState:UIControlStateHighlighted]; } _previousViewControllerBackButton = previousViewController.navigationItem.backBarButtonItem; // remember previous previousViewController.navigationItem.backBarButtonItem = newBackButton; } // Toolbar items BOOL hasItems = NO; UIBarButtonItem *fixedSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:self action:nil]; fixedSpace.width = 32; // To balance action button UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil]; NSMutableArray *items = [[NSMutableArray alloc] init]; // Left button - Grid if (_enableGrid) { hasItems = YES; NSString *buttonName = @"UIBarButtonItemGrid"; if (SYSTEM_VERSION_LESS_THAN(@"7")) buttonName = @"UIBarButtonItemGridiOS6"; [items addObject:[[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:[NSString stringWithFormat:@"MWPhotoBrowser.bundle/images/%@.png", buttonName]] style:UIBarButtonItemStylePlain target:self action:@selector(showGridAnimated)]]; } else { [items addObject:fixedSpace]; } // Middle - Nav if (_previousButton && _nextButton && numberOfPhotos > 1) { hasItems = YES; [items addObject:flexSpace]; [items addObject:_previousButton]; [items addObject:flexSpace]; [items addObject:_nextButton]; [items addObject:flexSpace]; } else { [items addObject:flexSpace]; } // Right - Action if (_actionButton && !(!hasItems && !self.navigationItem.rightBarButtonItem)) { [items addObject:_actionButton]; } else { // We're not showing the toolbar so try and show in top right if (_actionButton) self.navigationItem.rightBarButtonItem = _actionButton; [items addObject:fixedSpace]; } // Toolbar visibility [_toolbar setItems:items]; BOOL hideToolbar = YES; for (UIBarButtonItem* item in _toolbar.items) { if (item != fixedSpace && item != flexSpace) { hideToolbar = NO; break; } } if (hideToolbar) { [_toolbar removeFromSuperview]; } else { [self.view addSubview:_toolbar]; } // Update nav [self updateNavigation]; // Content offset _pagingScrollView.contentOffset = [self contentOffsetForPageAtIndex:_currentPageIndex]; [self tilePages]; _performingLayout = NO; } // Release any retained subviews of the main view. - (void)viewDidUnload { _currentPageIndex = 0; _pagingScrollView = nil; _visiblePages = nil; _recycledPages = nil; _toolbar = nil; _previousButton = nil; _nextButton = nil; _progressHUD = nil; [super viewDidUnload]; } - (BOOL)presentingViewControllerPrefersStatusBarHidden { UIViewController *presenting = self.presentingViewController; if (presenting) { if ([presenting isKindOfClass:[UINavigationController class]]) { presenting = [(UINavigationController *)presenting topViewController]; } } else { // We're in a navigation controller so get previous one! if (self.navigationController && self.navigationController.viewControllers.count > 1) { presenting = [self.navigationController.viewControllers objectAtIndex:self.navigationController.viewControllers.count-2]; } } if (presenting) { return [presenting prefersStatusBarHidden]; } else { return NO; } } #pragma mark - Appearance - (void)viewWillAppear:(BOOL)animated { // Super [super viewWillAppear:animated]; // Status bar if ([UIViewController instancesRespondToSelector:@selector(prefersStatusBarHidden)]) { _leaveStatusBarAlone = [self presentingViewControllerPrefersStatusBarHidden]; } else { _leaveStatusBarAlone = [UIApplication sharedApplication].statusBarHidden; } if (CGRectEqualToRect([[UIApplication sharedApplication] statusBarFrame], CGRectZero)) { // If the frame is zero then definitely leave it alone _leaveStatusBarAlone = YES; } BOOL fullScreen = YES; #if __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_7_0 if (SYSTEM_VERSION_LESS_THAN(@"7")) fullScreen = self.wantsFullScreenLayout; #endif if (!_leaveStatusBarAlone && fullScreen && UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) { _previousStatusBarStyle = [[UIApplication sharedApplication] statusBarStyle]; if (SYSTEM_VERSION_LESS_THAN(@"7")) { #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wdeprecated-declarations" [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackTranslucent animated:animated]; #pragma clang diagnostic push } else { [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault animated:animated]; } } // Navigation bar appearance if (!_viewIsActive && [self.navigationController.viewControllers objectAtIndex:0] != self) { [self storePreviousNavBarAppearance]; } [self setNavBarAppearance:animated]; // Update UI [self hideControlsAfterDelay]; // Initial appearance if (!_viewHasAppearedInitially) { if (_startOnGrid) { [self showGrid:NO]; } _viewHasAppearedInitially = YES; } } - (void)viewWillDisappear:(BOOL)animated { // Check that we're being popped for good if ([self.navigationController.viewControllers objectAtIndex:0] != self && ![self.navigationController.viewControllers containsObject:self]) { // State _viewIsActive = NO; // Bar state / appearance [self restorePreviousNavBarAppearance:animated]; } // Controls [self.navigationController.navigationBar.layer removeAllAnimations]; // Stop all animations on nav bar [NSObject cancelPreviousPerformRequestsWithTarget:self]; // Cancel any pending toggles from taps [self setControlsHidden:NO animated:NO permanent:YES]; // Status bar BOOL fullScreen = YES; #if __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_7_0 if (SYSTEM_VERSION_LESS_THAN(@"7")) fullScreen = self.wantsFullScreenLayout; #endif if (!_leaveStatusBarAlone && fullScreen && UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone) { [[UIApplication sharedApplication] setStatusBarStyle:_previousStatusBarStyle animated:animated]; } // Super [super viewWillDisappear:animated]; } - (void)viewDidAppear:(BOOL)animated { [super viewDidAppear:animated]; _viewIsActive = YES; } - (void)willMoveToParentViewController:(UIViewController *)parent { if (parent && _hasBelongedToViewController) { [NSException raise:@"MWPhotoBrowser Instance Reuse" format:@"MWPhotoBrowser instances cannot be reused."]; } } - (void)didMoveToParentViewController:(UIViewController *)parent { if (!parent) _hasBelongedToViewController = YES; } #pragma mark - Nav Bar Appearance - (void)setNavBarAppearance:(BOOL)animated { [self.navigationController setNavigationBarHidden:NO animated:animated]; UINavigationBar *navBar = self.navigationController.navigationBar; navBar.tintColor = SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7") ? [UIColor whiteColor] : nil; if ([navBar respondsToSelector:@selector(setBarTintColor:)]) { navBar.barTintColor = nil; navBar.shadowImage = nil; } navBar.translucent = YES; navBar.barStyle = UIBarStyleBlackTranslucent; if ([[UINavigationBar class] respondsToSelector:@selector(appearance)]) { [navBar setBackgroundImage:nil forBarMetrics:UIBarMetricsDefault]; [navBar setBackgroundImage:nil forBarMetrics:UIBarMetricsLandscapePhone]; } } - (void)storePreviousNavBarAppearance { _didSavePreviousStateOfNavBar = YES; if ([UINavigationBar instancesRespondToSelector:@selector(barTintColor)]) { _previousNavBarBarTintColor = self.navigationController.navigationBar.barTintColor; } _previousNavBarTranslucent = self.navigationController.navigationBar.translucent; _previousNavBarTintColor = self.navigationController.navigationBar.tintColor; _previousNavBarHidden = self.navigationController.navigationBarHidden; _previousNavBarStyle = self.navigationController.navigationBar.barStyle; if ([[UINavigationBar class] respondsToSelector:@selector(appearance)]) { _previousNavigationBarBackgroundImageDefault = [self.navigationController.navigationBar backgroundImageForBarMetrics:UIBarMetricsDefault]; _previousNavigationBarBackgroundImageLandscapePhone = [self.navigationController.navigationBar backgroundImageForBarMetrics:UIBarMetricsLandscapePhone]; } } - (void)restorePreviousNavBarAppearance:(BOOL)animated { if (_didSavePreviousStateOfNavBar) { [self.navigationController setNavigationBarHidden:_previousNavBarHidden animated:animated]; UINavigationBar *navBar = self.navigationController.navigationBar; navBar.tintColor = _previousNavBarTintColor; navBar.translucent = _previousNavBarTranslucent; if ([UINavigationBar instancesRespondToSelector:@selector(barTintColor)]) { navBar.barTintColor = _previousNavBarBarTintColor; } navBar.barStyle = _previousNavBarStyle; if ([[UINavigationBar class] respondsToSelector:@selector(appearance)]) { [navBar setBackgroundImage:_previousNavigationBarBackgroundImageDefault forBarMetrics:UIBarMetricsDefault]; [navBar setBackgroundImage:_previousNavigationBarBackgroundImageLandscapePhone forBarMetrics:UIBarMetricsLandscapePhone]; } // Restore back button if we need to if (_previousViewControllerBackButton) { UIViewController *previousViewController = [self.navigationController topViewController]; // We've disappeared so previous is now top previousViewController.navigationItem.backBarButtonItem = _previousViewControllerBackButton; _previousViewControllerBackButton = nil; } } } #pragma mark - Layout - (void)viewWillLayoutSubviews { [super viewWillLayoutSubviews]; [self layoutVisiblePages]; } - (void)layoutVisiblePages { // Flag _performingLayout = YES; // Toolbar _toolbar.frame = [self frameForToolbarAtOrientation:self.interfaceOrientation]; // Remember index NSUInteger indexPriorToLayout = _currentPageIndex; // Get paging scroll view frame to determine if anything needs changing CGRect pagingScrollViewFrame = [self frameForPagingScrollView]; // Frame needs changing if (!_skipNextPagingScrollViewPositioning) { _pagingScrollView.frame = pagingScrollViewFrame; } _skipNextPagingScrollViewPositioning = NO; // Recalculate contentSize based on current orientation _pagingScrollView.contentSize = [self contentSizeForPagingScrollView]; // Adjust frames and configuration of each visible page for (MWZoomingScrollView *page in _visiblePages) { NSUInteger index = page.index; page.frame = [self frameForPageAtIndex:index]; if (page.captionView) { page.captionView.frame = [self frameForCaptionView:page.captionView atIndex:index]; } if (page.selectedButton) { page.selectedButton.frame = [self frameForSelectedButton:page.selectedButton atIndex:index]; } // Adjust scales if bounds has changed since last time if (!CGRectEqualToRect(_previousLayoutBounds, self.view.bounds)) { // Update zooms for new bounds [page setMaxMinZoomScalesForCurrentBounds]; _previousLayoutBounds = self.view.bounds; } } // Adjust contentOffset to preserve page location based on values collected prior to location _pagingScrollView.contentOffset = [self contentOffsetForPageAtIndex:indexPriorToLayout]; [self didStartViewingPageAtIndex:_currentPageIndex]; // initial // Reset _currentPageIndex = indexPriorToLayout; _performingLayout = NO; } #pragma mark - Rotation - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation { return YES; } - (UIInterfaceOrientationMask)supportedInterfaceOrientations { return UIInterfaceOrientationMaskAll; } - (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration { // Remember page index before rotation _pageIndexBeforeRotation = _currentPageIndex; _rotating = YES; // In iOS 7 the nav bar gets shown after rotation, but might as well do this for everything! if ([self areControlsHidden]) { // Force hidden self.navigationController.navigationBarHidden = YES; } } - (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration { // Perform layout _currentPageIndex = _pageIndexBeforeRotation; // Delay control holding [self hideControlsAfterDelay]; // Layout [self layoutVisiblePages]; } - (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation { _rotating = NO; // Ensure nav bar isn't re-displayed if ([self areControlsHidden]) { self.navigationController.navigationBarHidden = NO; self.navigationController.navigationBar.alpha = 0; } } #pragma mark - Data - (NSUInteger)currentIndex { return _currentPageIndex; } - (void)reloadData { // Reset _photoCount = NSNotFound; // Get data NSUInteger numberOfPhotos = [self numberOfPhotos]; [self releaseAllUnderlyingPhotos:YES]; [_photos removeAllObjects]; [_thumbPhotos removeAllObjects]; for (int i = 0; i < numberOfPhotos; i++) { [_photos addObject:[NSNull null]]; [_thumbPhotos addObject:[NSNull null]]; } // Update current page index if (numberOfPhotos > 0) { _currentPageIndex = MAX(0, MIN(_currentPageIndex, numberOfPhotos - 1)); } else { _currentPageIndex = 0; } // Update layout if ([self isViewLoaded]) { while (_pagingScrollView.subviews.count) { [[_pagingScrollView.subviews lastObject] removeFromSuperview]; } [self performLayout]; [self.view setNeedsLayout]; } } - (NSUInteger)numberOfPhotos { if (_photoCount == NSNotFound) { if ([_delegate respondsToSelector:@selector(numberOfPhotosInPhotoBrowser:)]) { _photoCount = [_delegate numberOfPhotosInPhotoBrowser:self]; } else if (_depreciatedPhotoData) { _photoCount = _depreciatedPhotoData.count; } } if (_photoCount == NSNotFound) _photoCount = 0; return _photoCount; } - (id)photoAtIndex:(NSUInteger)index { id photo = nil; if (index < _photos.count) { if ([_photos objectAtIndex:index] == [NSNull null]) { if ([_delegate respondsToSelector:@selector(photoBrowser:photoAtIndex:)]) { photo = [_delegate photoBrowser:self photoAtIndex:index]; } else if (_depreciatedPhotoData && index < _depreciatedPhotoData.count) { photo = [_depreciatedPhotoData objectAtIndex:index]; } if (photo) [_photos replaceObjectAtIndex:index withObject:photo]; } else { photo = [_photos objectAtIndex:index]; } } return photo; } - (id)thumbPhotoAtIndex:(NSUInteger)index { id photo = nil; if (index < _thumbPhotos.count) { if ([_thumbPhotos objectAtIndex:index] == [NSNull null]) { if ([_delegate respondsToSelector:@selector(photoBrowser:thumbPhotoAtIndex:)]) { photo = [_delegate photoBrowser:self thumbPhotoAtIndex:index]; } if (photo) [_thumbPhotos replaceObjectAtIndex:index withObject:photo]; } else { photo = [_thumbPhotos objectAtIndex:index]; } } return photo; } - (MWCaptionView *)captionViewForPhotoAtIndex:(NSUInteger)index { MWCaptionView *captionView = nil; if ([_delegate respondsToSelector:@selector(photoBrowser:captionViewForPhotoAtIndex:)]) { captionView = [_delegate photoBrowser:self captionViewForPhotoAtIndex:index]; } else { id photo = [self photoAtIndex:index]; if ([photo respondsToSelector:@selector(caption)]) { if ([photo caption]) captionView = [[MWCaptionView alloc] initWithPhoto:photo]; } } captionView.alpha = [self areControlsHidden] ? 0 : 1; // Initial alpha return captionView; } - (BOOL)photoIsSelectedAtIndex:(NSUInteger)index { BOOL value = NO; if (_displaySelectionButtons) { if ([self.delegate respondsToSelector:@selector(photoBrowser:isPhotoSelectedAtIndex:)]) { value = [self.delegate photoBrowser:self isPhotoSelectedAtIndex:index]; } } return value; } - (void)setPhotoSelected:(BOOL)selected atIndex:(NSUInteger)index { if (_displaySelectionButtons) { if ([self.delegate respondsToSelector:@selector(photoBrowser:photoAtIndex:selectedChanged:)]) { [self.delegate photoBrowser:self photoAtIndex:index selectedChanged:selected]; } } } - (UIImage *)imageForPhoto:(id)photo { if (photo) { // Get image or obtain in background if ([photo underlyingImage]) { return [photo underlyingImage]; } else { [photo loadUnderlyingImageAndNotify]; } } return nil; } - (void)loadAdjacentPhotosIfNecessary:(id)photo { MWZoomingScrollView *page = [self pageDisplayingPhoto:photo]; if (page) { // If page is current page then initiate loading of previous and next pages NSUInteger pageIndex = page.index; if (_currentPageIndex == pageIndex) { if (pageIndex > 0) { // Preload index - 1 id photo = [self photoAtIndex:pageIndex-1]; if (![photo underlyingImage]) { [photo loadUnderlyingImageAndNotify]; MWLog(@"Pre-loading image at index %lu", (unsigned long)pageIndex-1); } } if (pageIndex < [self numberOfPhotos] - 1) { // Preload index + 1 id photo = [self photoAtIndex:pageIndex+1]; if (![photo underlyingImage]) { [photo loadUnderlyingImageAndNotify]; MWLog(@"Pre-loading image at index %lu", (unsigned long)pageIndex+1); } } } } } #pragma mark - MWPhoto Loading Notification - (void)handleMWPhotoLoadingDidEndNotification:(NSNotification *)notification { id photo = [notification object]; MWZoomingScrollView *page = [self pageDisplayingPhoto:photo]; if (page) { if ([photo underlyingImage]) { // Successful load [page displayImage]; [self loadAdjacentPhotosIfNecessary:photo]; } else { // Failed to load [page displayImageFailure]; } // Update nav [self updateNavigation]; } } #pragma mark - Paging - (void)tilePages { // Calculate which pages should be visible // Ignore padding as paging bounces encroach on that // and lead to false page loads CGRect visibleBounds = _pagingScrollView.bounds; NSInteger iFirstIndex = (NSInteger)floorf((CGRectGetMinX(visibleBounds)+PADDING*2) / CGRectGetWidth(visibleBounds)); NSInteger iLastIndex = (NSInteger)floorf((CGRectGetMaxX(visibleBounds)-PADDING*2-1) / CGRectGetWidth(visibleBounds)); if (iFirstIndex < 0) iFirstIndex = 0; if (iFirstIndex > [self numberOfPhotos] - 1) iFirstIndex = [self numberOfPhotos] - 1; if (iLastIndex < 0) iLastIndex = 0; if (iLastIndex > [self numberOfPhotos] - 1) iLastIndex = [self numberOfPhotos] - 1; // Recycle no longer needed pages NSInteger pageIndex; for (MWZoomingScrollView *page in _visiblePages) { pageIndex = page.index; if (pageIndex < (NSUInteger)iFirstIndex || pageIndex > (NSUInteger)iLastIndex) { [_recycledPages addObject:page]; [page.captionView removeFromSuperview]; [page.selectedButton removeFromSuperview]; [page prepareForReuse]; [page removeFromSuperview]; MWLog(@"Removed page at index %lu", (unsigned long)pageIndex); } } [_visiblePages minusSet:_recycledPages]; while (_recycledPages.count > 2) // Only keep 2 recycled pages [_recycledPages removeObject:[_recycledPages anyObject]]; // Add missing pages for (NSUInteger index = (NSUInteger)iFirstIndex; index <= (NSUInteger)iLastIndex; index++) { if (![self isDisplayingPageForIndex:index]) { // Add new page MWZoomingScrollView *page = [self dequeueRecycledPage]; if (!page) { page = [[MWZoomingScrollView alloc] initWithPhotoBrowser:self]; } [_visiblePages addObject:page]; [self configurePage:page forIndex:index]; [_pagingScrollView addSubview:page]; MWLog(@"Added page at index %lu", (unsigned long)index); // Add caption MWCaptionView *captionView = [self captionViewForPhotoAtIndex:index]; if (captionView) { captionView.frame = [self frameForCaptionView:captionView atIndex:index]; [_pagingScrollView addSubview:captionView]; page.captionView = captionView; } // Add selected button if (self.displaySelectionButtons) { UIButton *selectedButton = [UIButton buttonWithType:UIButtonTypeCustom]; [selectedButton setImage:[UIImage imageNamed:@"MWPhotoBrowser.bundle/images/ImageSelectedOff.png"] forState:UIControlStateNormal]; [selectedButton setImage:[UIImage imageNamed:@"MWPhotoBrowser.bundle/images/ImageSelectedOn.png"] forState:UIControlStateSelected]; [selectedButton sizeToFit]; selectedButton.adjustsImageWhenHighlighted = NO; [selectedButton addTarget:self action:@selector(selectedButtonTapped:) forControlEvents:UIControlEventTouchUpInside]; selectedButton.frame = [self frameForSelectedButton:selectedButton atIndex:index]; [_pagingScrollView addSubview:selectedButton]; page.selectedButton = selectedButton; selectedButton.selected = [self photoIsSelectedAtIndex:index]; } } } } - (void)updateVisiblePageStates { NSSet *copy = [_visiblePages copy]; for (MWZoomingScrollView *page in copy) { // Update selection page.selectedButton.selected = [self photoIsSelectedAtIndex:page.index]; } } - (BOOL)isDisplayingPageForIndex:(NSUInteger)index { for (MWZoomingScrollView *page in _visiblePages) if (page.index == index) return YES; return NO; } - (MWZoomingScrollView *)pageDisplayedAtIndex:(NSUInteger)index { MWZoomingScrollView *thePage = nil; for (MWZoomingScrollView *page in _visiblePages) { if (page.index == index) { thePage = page; break; } } return thePage; } - (MWZoomingScrollView *)pageDisplayingPhoto:(id)photo { MWZoomingScrollView *thePage = nil; for (MWZoomingScrollView *page in _visiblePages) { if (page.photo == photo) { thePage = page; break; } } return thePage; } - (void)configurePage:(MWZoomingScrollView *)page forIndex:(NSUInteger)index { page.frame = [self frameForPageAtIndex:index]; page.index = index; page.photo = [self photoAtIndex:index]; } - (MWZoomingScrollView *)dequeueRecycledPage { MWZoomingScrollView *page = [_recycledPages anyObject]; if (page) { [_recycledPages removeObject:page]; } return page; } // Handle page changes - (void)didStartViewingPageAtIndex:(NSUInteger)index { if (![self numberOfPhotos]) { // Show controls [self setControlsHidden:NO animated:YES permanent:YES]; return; } // Release images further away than +/-1 NSUInteger i; if (index > 0) { // Release anything < index - 1 for (i = 0; i < index-1; i++) { id photo = [_photos objectAtIndex:i]; if (photo != [NSNull null]) { [photo unloadUnderlyingImage]; [_photos replaceObjectAtIndex:i withObject:[NSNull null]]; MWLog(@"Released underlying image at index %lu", (unsigned long)i); } } } if (index < [self numberOfPhotos] - 1) { // Release anything > index + 1 for (i = index + 2; i < _photos.count; i++) { id photo = [_photos objectAtIndex:i]; if (photo != [NSNull null]) { [photo unloadUnderlyingImage]; [_photos replaceObjectAtIndex:i withObject:[NSNull null]]; MWLog(@"Released underlying image at index %lu", (unsigned long)i); } } } // Load adjacent images if needed and the photo is already // loaded. Also called after photo has been loaded in background id currentPhoto = [self photoAtIndex:index]; if ([currentPhoto underlyingImage]) { // photo loaded so load ajacent now [self loadAdjacentPhotosIfNecessary:currentPhoto]; } // Notify delegate if (index != _previousPageIndex) { if ([_delegate respondsToSelector:@selector(photoBrowser:didDisplayPhotoAtIndex:)]) [_delegate photoBrowser:self didDisplayPhotoAtIndex:index]; _previousPageIndex = index; } // Update nav [self updateNavigation]; } #pragma mark - Frame Calculations - (CGRect)frameForPagingScrollView { CGRect frame = self.view.bounds;// [[UIScreen mainScreen] bounds]; frame.origin.x -= PADDING; frame.size.width += (2 * PADDING); return CGRectIntegral(frame); } - (CGRect)frameForPageAtIndex:(NSUInteger)index { // We have to use our paging scroll view's bounds, not frame, to calculate the page placement. When the device is in // landscape orientation, the frame will still be in portrait because the pagingScrollView is the root view controller's // view, so its frame is in window coordinate space, which is never rotated. Its bounds, however, will be in landscape // because it has a rotation transform applied. CGRect bounds = _pagingScrollView.bounds; CGRect pageFrame = bounds; pageFrame.size.width -= (2 * PADDING); pageFrame.origin.x = (bounds.size.width * index) + PADDING; return CGRectIntegral(pageFrame); } - (CGSize)contentSizeForPagingScrollView { // We have to use the paging scroll view's bounds to calculate the contentSize, for the same reason outlined above. CGRect bounds = _pagingScrollView.bounds; return CGSizeMake(bounds.size.width * [self numberOfPhotos], bounds.size.height); } - (CGPoint)contentOffsetForPageAtIndex:(NSUInteger)index { CGFloat pageWidth = _pagingScrollView.bounds.size.width; CGFloat newOffset = index * pageWidth; return CGPointMake(newOffset, 0); } - (CGRect)frameForToolbarAtOrientation:(UIInterfaceOrientation)orientation { CGFloat height = 44; if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone && UIInterfaceOrientationIsLandscape(orientation)) height = 32; return CGRectIntegral(CGRectMake(0, self.view.bounds.size.height - height, self.view.bounds.size.width, height)); } - (CGRect)frameForCaptionView:(MWCaptionView *)captionView atIndex:(NSUInteger)index { CGRect pageFrame = [self frameForPageAtIndex:index]; CGSize captionSize = [captionView sizeThatFits:CGSizeMake(pageFrame.size.width, 0)]; CGRect captionFrame = CGRectMake(pageFrame.origin.x, pageFrame.size.height - captionSize.height - (_toolbar.superview?_toolbar.frame.size.height:0), pageFrame.size.width, captionSize.height); return CGRectIntegral(captionFrame); } - (CGRect)frameForSelectedButton:(UIButton *)selectedButton atIndex:(NSUInteger)index { CGRect pageFrame = [self frameForPageAtIndex:index]; CGFloat yOffset = 0; if (![self areControlsHidden]) { UINavigationBar *navBar = self.navigationController.navigationBar; yOffset = navBar.frame.origin.y + navBar.frame.size.height; } CGFloat statusBarOffset = [[UIApplication sharedApplication] statusBarFrame].size.height; #if __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_7_0 if (SYSTEM_VERSION_LESS_THAN(@"7") && !self.wantsFullScreenLayout) statusBarOffset = 0; #endif CGRect captionFrame = CGRectMake(pageFrame.origin.x + pageFrame.size.width - 20 - selectedButton.frame.size.width, statusBarOffset + yOffset, selectedButton.frame.size.width, selectedButton.frame.size.height); return CGRectIntegral(captionFrame); } #pragma mark - UIScrollView Delegate - (void)scrollViewDidScroll:(UIScrollView *)scrollView { // Checks if (!_viewIsActive || _performingLayout || _rotating) return; // Tile pages [self tilePages]; // Calculate current page CGRect visibleBounds = _pagingScrollView.bounds; NSInteger index = (NSInteger)(floorf(CGRectGetMidX(visibleBounds) / CGRectGetWidth(visibleBounds))); if (index < 0) index = 0; if (index > [self numberOfPhotos] - 1) index = [self numberOfPhotos] - 1; NSUInteger previousCurrentPage = _currentPageIndex; _currentPageIndex = index; if (_currentPageIndex != previousCurrentPage) { [self didStartViewingPageAtIndex:index]; } } - (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView { // Hide controls when dragging begins [self setControlsHidden:YES animated:YES permanent:NO]; } - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView { // Update nav when page changes [self updateNavigation]; } #pragma mark - Navigation - (void)updateNavigation { // Title NSUInteger numberOfPhotos = [self numberOfPhotos]; if (_gridController) { if (_gridController.selectionMode) { self.title = NSEaseLocalizedString(@"Select Photos", nil); } else { NSString *photosText; if (numberOfPhotos == 1) { photosText = NSEaseLocalizedString(@"photo", @"Used in the context: '1 photo'"); } else { photosText = NSEaseLocalizedString(@"photos", @"Used in the context: '3 photos'"); } self.title = [NSString stringWithFormat:@"%lu %@", (unsigned long)numberOfPhotos, photosText]; } } else if (numberOfPhotos > 1) { if ([_delegate respondsToSelector:@selector(photoBrowser:titleForPhotoAtIndex:)]) { self.title = [_delegate photoBrowser:self titleForPhotoAtIndex:_currentPageIndex]; } else { self.title = [NSString stringWithFormat:@"%lu %@ %lu", (unsigned long)(_currentPageIndex+1), NSEaseLocalizedString(@"of", @"Used in the context: 'Showing 1 of 3 items'"), (unsigned long)numberOfPhotos]; } } else { self.title = nil; } // Buttons _previousButton.enabled = (_currentPageIndex > 0); _nextButton.enabled = (_currentPageIndex < numberOfPhotos - 1); _actionButton.enabled = [[self photoAtIndex:_currentPageIndex] underlyingImage] != nil; } - (void)jumpToPageAtIndex:(NSUInteger)index animated:(BOOL)animated { // Change page if (index < [self numberOfPhotos]) { CGRect pageFrame = [self frameForPageAtIndex:index]; [_pagingScrollView setContentOffset:CGPointMake(pageFrame.origin.x - PADDING, 0) animated:animated]; [self updateNavigation]; } // Update timer to give more time [self hideControlsAfterDelay]; } - (void)gotoPreviousPage { [self showPreviousPhotoAnimated:NO]; } - (void)gotoNextPage { [self showNextPhotoAnimated:NO]; } - (void)showPreviousPhotoAnimated:(BOOL)animated { [self jumpToPageAtIndex:_currentPageIndex-1 animated:animated]; } - (void)showNextPhotoAnimated:(BOOL)animated { [self jumpToPageAtIndex:_currentPageIndex+1 animated:animated]; } #pragma mark - Interactions - (void)selectedButtonTapped:(id)sender { UIButton *selectedButton = (UIButton *)sender; selectedButton.selected = !selectedButton.selected; NSUInteger index = NSUIntegerMax; for (MWZoomingScrollView *page in _visiblePages) { if (page.selectedButton == selectedButton) { index = page.index; break; } } if (index != NSUIntegerMax) { [self setPhotoSelected:selectedButton.selected atIndex:index]; } } #pragma mark - Grid - (void)showGridAnimated { [self showGrid:YES]; } - (void)showGrid:(BOOL)animated { if (_gridController) return; // Init grid controller _gridController = [[MWGridViewController alloc] init]; _gridController.initialContentOffset = _currentGridContentOffset; _gridController.browser = self; _gridController.selectionMode = _displaySelectionButtons; _gridController.view.frame = self.view.bounds; _gridController.view.frame = CGRectOffset(_gridController.view.frame, 0, (self.startOnGrid ? -1 : 1) * self.view.bounds.size.height); // Stop specific layout being triggered _skipNextPagingScrollViewPositioning = YES; // Add as a child view controller [self addChildViewController:_gridController]; [self.view addSubview:_gridController.view]; // Hide action button on nav bar if it exists if (self.navigationItem.rightBarButtonItem == _actionButton) { _gridPreviousRightNavItem = _actionButton; [self.navigationItem setRightBarButtonItem:nil animated:YES]; } else { _gridPreviousRightNavItem = nil; } // Update [self updateNavigation]; [self setControlsHidden:NO animated:YES permanent:YES]; // Animate grid in and photo scroller out [UIView animateWithDuration:animated ? 0.3 : 0 animations:^(void) { self->_gridController.view.frame = self.view.bounds; CGRect newPagingFrame = [self frameForPagingScrollView]; newPagingFrame = CGRectOffset(newPagingFrame, 0, (self.startOnGrid ? 1 : -1) * newPagingFrame.size.height); self->_pagingScrollView.frame = newPagingFrame; } completion:^(BOOL finished) { [self->_gridController didMoveToParentViewController:self]; }]; } - (void)hideGrid { if (!_gridController) return; // Remember previous content offset _currentGridContentOffset = _gridController.collectionView.contentOffset; // Restore action button if it was removed if (_gridPreviousRightNavItem == _actionButton && _actionButton) { [self.navigationItem setRightBarButtonItem:_gridPreviousRightNavItem animated:YES]; } // Position prior to hide animation CGRect newPagingFrame = [self frameForPagingScrollView]; newPagingFrame = CGRectOffset(newPagingFrame, 0, (self.startOnGrid ? 1 : -1) * newPagingFrame.size.height); _pagingScrollView.frame = newPagingFrame; // Remember and remove controller now so things can detect a nil grid controller MWGridViewController *tmpGridController = _gridController; _gridController = nil; // Update [self updateNavigation]; [self updateVisiblePageStates]; // Animate, hide grid and show paging scroll view [UIView animateWithDuration:0.3 animations:^{ tmpGridController.view.frame = CGRectOffset(self.view.bounds, 0, (self.startOnGrid ? -1 : 1) * self.view.bounds.size.height); self->_pagingScrollView.frame = [self frameForPagingScrollView]; } completion:^(BOOL finished) { [tmpGridController willMoveToParentViewController:nil]; [tmpGridController.view removeFromSuperview]; [tmpGridController removeFromParentViewController]; [self setControlsHidden:NO animated:YES permanent:NO]; // retrigger timer }]; } #pragma mark - Control Hiding / Showing // If permanent then we don't set timers to hide again // Fades all controls on iOS 5 & 6, and iOS 7 controls slide and fade - (void)setControlsHidden:(BOOL)hidden animated:(BOOL)animated permanent:(BOOL)permanent { // Force visible if (![self numberOfPhotos] || _gridController || _alwaysShowControls) hidden = NO; // Cancel any timers [self cancelControlHiding]; // Animations & positions BOOL slideAndFade = SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7"); CGFloat animatonOffset = 20; CGFloat animationDuration = (animated ? 0.35 : 0); // Status bar if (!_leaveStatusBarAlone) { if ([self respondsToSelector:@selector(setNeedsStatusBarAppearanceUpdate)]) { // iOS 7 // Hide status bar if (!_isVCBasedStatusBarAppearance) { // Non-view controller based [[UIApplication sharedApplication] setStatusBarHidden:hidden withAnimation:animated ? UIStatusBarAnimationSlide : UIStatusBarAnimationNone]; } else { // View controller based so animate away _statusBarShouldBeHidden = hidden; [UIView animateWithDuration:animationDuration animations:^(void) { [self setNeedsStatusBarAppearanceUpdate]; } completion:^(BOOL finished) {}]; } } else { // iOS < 7 // Status bar and nav bar positioning BOOL fullScreen = YES; #if __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_7_0 if (SYSTEM_VERSION_LESS_THAN(@"7")) fullScreen = self.wantsFullScreenLayout; #endif if (fullScreen) { // Need to get heights and set nav bar position to overcome display issues // Get status bar height if visible CGFloat statusBarHeight = 0; if (![UIApplication sharedApplication].statusBarHidden) { CGRect statusBarFrame = [[UIApplication sharedApplication] statusBarFrame]; statusBarHeight = MIN(statusBarFrame.size.height, statusBarFrame.size.width); } // Status Bar [[UIApplication sharedApplication] setStatusBarHidden:hidden withAnimation:animated?UIStatusBarAnimationFade:UIStatusBarAnimationNone]; // Get status bar height if visible if (![UIApplication sharedApplication].statusBarHidden) { CGRect statusBarFrame = [[UIApplication sharedApplication] statusBarFrame]; statusBarHeight = MIN(statusBarFrame.size.height, statusBarFrame.size.width); } // Set navigation bar frame CGRect navBarFrame = self.navigationController.navigationBar.frame; navBarFrame.origin.y = statusBarHeight; self.navigationController.navigationBar.frame = navBarFrame; } } } // Toolbar, nav bar and captions // Pre-appear animation positions for iOS 7 sliding if (slideAndFade && [self areControlsHidden] && !hidden && animated) { // Toolbar _toolbar.frame = CGRectOffset([self frameForToolbarAtOrientation:self.interfaceOrientation], 0, animatonOffset); // Captions for (MWZoomingScrollView *page in _visiblePages) { if (page.captionView) { MWCaptionView *v = page.captionView; // Pass any index, all we're interested in is the Y CGRect captionFrame = [self frameForCaptionView:v atIndex:0]; captionFrame.origin.x = v.frame.origin.x; // Reset X v.frame = CGRectOffset(captionFrame, 0, animatonOffset); } } } [UIView animateWithDuration:animationDuration animations:^(void) { CGFloat alpha = hidden ? 0 : 1; // Nav bar slides up on it's own on iOS 7 [self.navigationController.navigationBar setAlpha:alpha]; // Toolbar if (slideAndFade) { self->_toolbar.frame = [self frameForToolbarAtOrientation:self.interfaceOrientation]; if (hidden) self->_toolbar.frame = CGRectOffset(self->_toolbar.frame, 0, animatonOffset); } self->_toolbar.alpha = alpha; // Captions for (MWZoomingScrollView *page in self->_visiblePages) { if (page.captionView) { MWCaptionView *v = page.captionView; if (slideAndFade) { // Pass any index, all we're interested in is the Y CGRect captionFrame = [self frameForCaptionView:v atIndex:0]; captionFrame.origin.x = v.frame.origin.x; // Reset X if (hidden) captionFrame = CGRectOffset(captionFrame, 0, animatonOffset); v.frame = captionFrame; } v.alpha = alpha; } } // Selected buttons for (MWZoomingScrollView *page in self->_visiblePages) { if (page.selectedButton) { UIButton *v = page.selectedButton; CGRect newFrame = [self frameForSelectedButton:v atIndex:0]; newFrame.origin.x = v.frame.origin.x; v.frame = newFrame; } } } completion:^(BOOL finished) {}]; // Control hiding timer // Will cancel existing timer but only begin hiding if // they are visible if (!permanent) [self hideControlsAfterDelay]; } - (BOOL)prefersStatusBarHidden { if (!_leaveStatusBarAlone) { return _statusBarShouldBeHidden; } else { return [self presentingViewControllerPrefersStatusBarHidden]; } } - (UIStatusBarAnimation)preferredStatusBarUpdateAnimation { return UIStatusBarAnimationSlide; } - (void)cancelControlHiding { // If a timer exists then cancel and release if (_controlVisibilityTimer) { [_controlVisibilityTimer invalidate]; _controlVisibilityTimer = nil; } } // Enable/disable control visiblity timer - (void)hideControlsAfterDelay { if (![self areControlsHidden]) { [self cancelControlHiding]; _controlVisibilityTimer = [NSTimer scheduledTimerWithTimeInterval:self.delayToHideElements target:self selector:@selector(hideControls) userInfo:nil repeats:NO]; } } - (BOOL)areControlsHidden { return (_toolbar.alpha == 0); } - (void)hideControls { [self setControlsHidden:YES animated:YES permanent:NO]; } - (void)toggleControls { [self setControlsHidden:![self areControlsHidden] animated:YES permanent:NO]; } #pragma mark - Properties // Handle depreciated method - (void)setInitialPageIndex:(NSUInteger)index { [self setCurrentPhotoIndex:index]; } - (void)setCurrentPhotoIndex:(NSUInteger)index { // Validate NSUInteger photoCount = [self numberOfPhotos]; if (photoCount == 0) { index = 0; } else { if (index >= photoCount) index = [self numberOfPhotos]-1; } _currentPageIndex = index; if ([self isViewLoaded]) { [self jumpToPageAtIndex:index animated:NO]; if (!_viewIsActive) [self tilePages]; // Force tiling if view is not visible } } #pragma mark - Misc - (void)doneButtonPressed:(id)sender { // Only if we're modal and there's a done button if (_doneButton) { // See if we actually just want to show/hide grid if (self.enableGrid) { if (self.startOnGrid && !_gridController) { [self showGrid:YES]; return; } else if (!self.startOnGrid && _gridController) { [self hideGrid]; return; } } // Dismiss view controller if ([_delegate respondsToSelector:@selector(photoBrowserDidFinishModalPresentation:)]) { // Call delegate method and let them dismiss us [_delegate photoBrowserDidFinishModalPresentation:self]; } else { [self dismissViewControllerAnimated:YES completion:nil]; } } } #pragma mark - Actions - (void)actionButtonPressed:(id)sender { if (_actionsSheet) { // Dismiss [_actionsSheet dismissWithClickedButtonIndex:_actionsSheet.cancelButtonIndex animated:YES]; } else { // Only react when image has loaded id photo = [self photoAtIndex:_currentPageIndex]; if ([self numberOfPhotos] > 0 && [photo underlyingImage]) { // If they have defined a delegate method then just message them if ([self.delegate respondsToSelector:@selector(photoBrowser:actionButtonPressedForPhotoAtIndex:)]) { // Let delegate handle things [self.delegate photoBrowser:self actionButtonPressedForPhotoAtIndex:_currentPageIndex]; } else { // Handle default actions if (SYSTEM_VERSION_LESS_THAN(@"6")) { // Old handling of activities with action sheet if ([MFMailComposeViewController canSendMail]) { _actionsSheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:NSEaseLocalizedString(@"Cancel", nil) destructiveButtonTitle:nil otherButtonTitles:NSEaseLocalizedString(@"Save", nil), NSEaseLocalizedString(@"Copy", nil), NSEaseLocalizedString(@"Email", nil), nil]; } else { _actionsSheet = [[UIActionSheet alloc] initWithTitle:nil delegate:self cancelButtonTitle:NSEaseLocalizedString(@"Cancel", nil) destructiveButtonTitle:nil otherButtonTitles:NSEaseLocalizedString(@"Save", nil), NSEaseLocalizedString(@"Copy", nil), nil]; } _actionsSheet.tag = ACTION_SHEET_OLD_ACTIONS; _actionsSheet.actionSheetStyle = UIActionSheetStyleBlackTranslucent; if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) { [_actionsSheet showFromBarButtonItem:sender animated:YES]; } else { [_actionsSheet showInView:self.view]; } } else { // Show activity view controller NSMutableArray *items = [NSMutableArray arrayWithObject:[photo underlyingImage]]; if (photo.caption) { [items addObject:photo.caption]; } self.activityViewController = [[UIActivityViewController alloc] initWithActivityItems:items applicationActivities:nil]; // Show loading spinner after a couple of seconds double delayInSeconds = 2.0; dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC)); dispatch_after(popTime, dispatch_get_main_queue(), ^(void){ if (self.activityViewController) { [self showProgressHUDWithMessage:nil]; } }); // Show typeof(self) __weak weakSelf = self; [self.activityViewController setCompletionHandler:^(NSString *activityType, BOOL completed) { weakSelf.activityViewController = nil; [weakSelf hideControlsAfterDelay]; [weakSelf hideProgressHUD:YES]; }]; // iOS 8 - Set the Anchor Point for the popover if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8")) { self.activityViewController.popoverPresentationController.barButtonItem = _actionButton; } [self presentViewController:self.activityViewController animated:YES completion:nil]; } } // Keep controls hidden [self setControlsHidden:NO animated:YES permanent:YES]; } } } #pragma mark - Action Sheet Delegate - (void)actionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex { if (actionSheet.tag == ACTION_SHEET_OLD_ACTIONS) { // Old Actions _actionsSheet = nil; if (buttonIndex != actionSheet.cancelButtonIndex) { if (buttonIndex == actionSheet.firstOtherButtonIndex) { [self savePhoto]; return; } else if (buttonIndex == actionSheet.firstOtherButtonIndex + 1) { [self copyPhoto]; return; } else if (buttonIndex == actionSheet.firstOtherButtonIndex + 2) { [self emailPhoto]; return; } } } [self hideControlsAfterDelay]; // Continue as normal... } #pragma mark - Action Progress - (MBProgressHUD *)progressHUD { if (!_progressHUD) { _progressHUD = [[MBProgressHUD alloc] initWithView:self.view]; _progressHUD.minSize = CGSizeMake(120, 120); _progressHUD.minShowTime = 1; // The sample image is based on the // work by: http://www.pixelpressicons.com // licence: http://creativecommons.org/licenses/by/2.5/ca/ self.progressHUD.customView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"MWPhotoBrowser.bundle/images/Checkmark.png"]]; [self.view addSubview:_progressHUD]; } return _progressHUD; } - (void)showProgressHUDWithMessage:(NSString *)message { self.progressHUD.labelText = message; self.progressHUD.mode = MBProgressHUDModeIndeterminate; [self.progressHUD show:YES]; self.navigationController.navigationBar.userInteractionEnabled = NO; } - (void)hideProgressHUD:(BOOL)animated { [self.progressHUD hide:animated]; self.navigationController.navigationBar.userInteractionEnabled = YES; } - (void)showProgressHUDCompleteMessage:(NSString *)message { if (message) { if (self.progressHUD.isHidden) [self.progressHUD show:YES]; self.progressHUD.labelText = message; self.progressHUD.mode = MBProgressHUDModeCustomView; [self.progressHUD hide:YES afterDelay:1.5]; } else { [self.progressHUD hide:YES]; } self.navigationController.navigationBar.userInteractionEnabled = YES; } #pragma mark - Actions - (void)savePhoto { id photo = [self photoAtIndex:_currentPageIndex]; if ([photo underlyingImage]) { [self showProgressHUDWithMessage:[NSString stringWithFormat:@"%@\u2026" , NSEaseLocalizedString(@"Saving", @"Displayed with ellipsis as 'Saving...' when an item is in the process of being saved")]]; [self performSelector:@selector(actuallySavePhoto:) withObject:photo afterDelay:0]; } } - (void)actuallySavePhoto:(id)photo { if ([photo underlyingImage]) { UIImageWriteToSavedPhotosAlbum([photo underlyingImage], self, @selector(image:didFinishSavingWithError:contextInfo:), nil); } } - (void)image:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo { [self showProgressHUDCompleteMessage: error ? NSEaseLocalizedString(@"Failed", @"Informing the user a process has failed") : NSEaseLocalizedString(@"Saved", @"Informing the user an item has been saved")]; [self hideControlsAfterDelay]; // Continue as normal... } - (void)copyPhoto { id photo = [self photoAtIndex:_currentPageIndex]; if ([photo underlyingImage]) { [self showProgressHUDWithMessage:[NSString stringWithFormat:@"%@\u2026" , NSEaseLocalizedString(@"Copying", @"Displayed with ellipsis as 'Copying...' when an item is in the process of being copied")]]; [self performSelector:@selector(actuallyCopyPhoto:) withObject:photo afterDelay:0]; } } - (void)actuallyCopyPhoto:(id)photo { if ([photo underlyingImage]) { [[UIPasteboard generalPasteboard] setData:UIImagePNGRepresentation([photo underlyingImage]) forPasteboardType:@"public.png"]; [self showProgressHUDCompleteMessage:NSEaseLocalizedString(@"Copied", @"Informing the user an item has finished copying")]; [self hideControlsAfterDelay]; // Continue as normal... } } - (void)emailPhoto { id photo = [self photoAtIndex:_currentPageIndex]; if ([photo underlyingImage]) { [self showProgressHUDWithMessage:[NSString stringWithFormat:@"%@\u2026" , NSEaseLocalizedString(@"Preparing", @"Displayed with ellipsis as 'Preparing...' when an item is in the process of being prepared")]]; [self performSelector:@selector(actuallyEmailPhoto:) withObject:photo afterDelay:0]; } } - (void)actuallyEmailPhoto:(id)photo { if ([photo underlyingImage]) { MFMailComposeViewController *emailer = [[MFMailComposeViewController alloc] init]; emailer.mailComposeDelegate = self; [emailer setSubject:NSEaseLocalizedString(@"Photo", nil)]; [emailer addAttachmentData:UIImagePNGRepresentation([photo underlyingImage]) mimeType:@"png" fileName:@"Photo.png"]; if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) { emailer.modalPresentationStyle = UIModalPresentationPageSheet; } [self presentViewController:emailer animated:YES completion:nil]; [self hideProgressHUD:NO]; } } - (void)mailComposeController:(MFMailComposeViewController*)controller didFinishWithResult:(MFMailComposeResult)result error:(NSError*)error { if (result == MFMailComposeResultFailed) { UIAlertView *alert = [[UIAlertView alloc] initWithTitle:NSEaseLocalizedString(@"Email", nil) message:NSEaseLocalizedString(@"Email failed to send. Please try again.", nil) delegate:nil cancelButtonTitle:NSEaseLocalizedString(@"Dismiss", nil) otherButtonTitles:nil]; [alert show]; } [self dismissViewControllerAnimated:YES completion:nil]; } @end