// // XHImageViewer.m // XHImageViewer // // Created by 曾 宪华 on 14-2-17. // Copyright (c) 2014年 曾宪华 开发团队(http://iyilunba.com ) 本人QQ:543413507 本人QQ群(142557668). All rights reserved. // #import "XHImageViewer.h" #import "XHViewState.h" #import "XHZoomingImageView.h" @interface XHImageViewer () @property (nonatomic, strong) UIScrollView *scrollView; @property (nonatomic, strong) NSArray *imgViews; @end @implementation XHImageViewer { UILabel *showSelectPage; } - (id)init { self = [self initWithFrame:CGRectZero]; if (self) { [self _setup]; } return self; } - (void)_setup { self.backgroundColor = [UIColor colorWithWhite:0.1 alpha:1]; self.backgroundScale = 0.95; UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(didPan:)]; pan.maximumNumberOfTouches = 1; [self addGestureRecognizer:pan]; } - (id)initWithFrame:(CGRect)frame { self = [super initWithFrame:[[UIScreen mainScreen] bounds]]; if (self) { [self _setup]; } return self; } - (void)setImageViewsFromArray:(NSArray*)views { NSMutableArray *imgViews = [NSMutableArray array]; for(id obj in views){ if([obj isKindOfClass:[UIImageView class]]){ [imgViews addObject:obj]; UIImageView *view = obj; XHViewState *state = [XHViewState viewStateForView:view]; [state setStateWithView:view]; view.userInteractionEnabled = NO; } } _imgViews = [imgViews copy]; } - (void)showWithImageViews:(NSArray*)views selectedView:(UIImageView*)selectedView{ [self setImageViewsFromArray:views]; if(_imgViews.count > 0){ if(![selectedView isKindOfClass:[UIImageView class]] || ![_imgViews containsObject:selectedView]){ selectedView = _imgViews[0]; } [self showWithSelectedView:selectedView]; } } #pragma mark- Properties - (void)setBackgroundColor:(UIColor *)backgroundColor { [super setBackgroundColor:[backgroundColor colorWithAlphaComponent:0]]; } - (NSInteger)pageIndex { return (_scrollView.contentOffset.x / _scrollView.frame.size.width + 0.5); } #pragma mark- View management - (UIImageView *)currentView { return [_imgViews objectAtIndex:self.pageIndex]; } - (void)showWithSelectedView:(UIImageView*)selectedView { for(UIView *view in _scrollView.subviews) { [view removeFromSuperview]; } const NSInteger currentPage = [_imgViews indexOfObject:selectedView]; UIWindow *window = [[[UIApplication sharedApplication] delegate] window]; if(_scrollView == nil) { _scrollView = [[UIScrollView alloc] initWithFrame:self.bounds]; _scrollView.pagingEnabled = YES; _scrollView.showsHorizontalScrollIndicator = NO; _scrollView.showsVerticalScrollIndicator = NO; [_scrollView setDelegate:self]; _scrollView.backgroundColor = [self.backgroundColor colorWithAlphaComponent:1]; _scrollView.alpha = 0; } [self addSubview:_scrollView]; [window addSubview:self]; const CGFloat fullW = window.frame.size.width; const CGFloat fullH = window.frame.size.height; selectedView.frame = [window convertRect:selectedView.frame fromView:selectedView.superview]; [window addSubview:selectedView]; showSelectPage = [[UILabel alloc] initWithFrame:CGRectMake(selectedView.center.x-60.0,[[UIScreen mainScreen] bounds].size.height-40.0f, 120.0, 30.0)]; // [showSelectPage setText:[NSString stringWithFormat:@"%d/%d",self.pageIndex+1,_imgViews.count]]; [showSelectPage setTextAlignment:NSTextAlignmentCenter]; [showSelectPage setTextColor:[UIColor whiteColor]]; [showSelectPage setBackgroundColor:[UIColor clearColor]]; [window addSubview:showSelectPage]; [UIView animateWithDuration:0.3 animations:^{ _scrollView.alpha = 1; window.rootViewController.view.transform = CGAffineTransformMakeScale(self.backgroundScale, self.backgroundScale); selectedView.transform = CGAffineTransformIdentity; CGSize size = (selectedView.image) ? selectedView.image.size : selectedView.frame.size; CGFloat ratio = MIN(fullW / size.width, fullH / size.height); CGFloat W = ratio * size.width; CGFloat H = ratio * size.height; selectedView.frame = CGRectMake((fullW-W)/2, (fullH-H)/2, W, H); } completion:^(BOOL finished) { _scrollView.contentSize = CGSizeMake(_imgViews.count * fullW, 0); _scrollView.contentOffset = CGPointMake(currentPage * fullW, 0); UITapGestureRecognizer *gesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tappedScrollView:)]; [_scrollView addGestureRecognizer:gesture]; for(UIImageView *view in _imgViews){ view.transform = CGAffineTransformIdentity; CGSize size = (view.image) ? view.image.size : view.frame.size; CGFloat ratio = MIN(fullW / size.width, fullH / size.height); CGFloat W = ratio * size.width; CGFloat H = ratio * size.height; view.frame = CGRectMake((fullW-W)/2, (fullH-H)/2, W, H); XHZoomingImageView *tmp = [[XHZoomingImageView alloc] initWithFrame:CGRectMake([_imgViews indexOfObject:view] * fullW, 0, fullW, fullH)]; tmp.imageView = view; [_scrollView addSubview:tmp]; } } ]; } - (void)scrollViewDidScroll:(UIScrollView *)scrollView { [showSelectPage setText:[NSString stringWithFormat:@"%ld/%lu",self.pageIndex+1,(unsigned long)_imgViews.count]]; } - (void)prepareToDismiss { [showSelectPage removeFromSuperview]; UIImageView *currentView = [self currentView]; // if([self.delegate respondsToSelector:@selector(imageViewer:willDismissWithSelectedView:)]) { // [self.delegate imageViewer:self willDismissWithSelectedView:currentView]; // } for(UIImageView *view in _imgViews) { if(view != currentView) { XHViewState *state = [XHViewState viewStateForView:view]; view.transform = CGAffineTransformIdentity; view.frame = state.frame; view.transform = state.transform; [state.superview addSubview:view]; } } } - (void)dismissWithAnimate { UIView *currentView = [self currentView]; UIWindow *window = [[[UIApplication sharedApplication] delegate] window]; CGRect rct = currentView.frame; currentView.transform = CGAffineTransformIdentity; currentView.frame = [window convertRect:rct fromView:currentView.superview]; [window addSubview:currentView]; [UIView animateWithDuration:0.3 animations:^{ _scrollView.alpha = 0; window.rootViewController.view.transform = CGAffineTransformIdentity; XHViewState *state = [XHViewState viewStateForView:currentView]; currentView.frame = [window convertRect:state.frame fromView:state.superview]; currentView.transform = state.transform; } completion:^(BOOL finished) { XHViewState *state = [XHViewState viewStateForView:currentView]; currentView.transform = CGAffineTransformIdentity; currentView.frame = state.frame; currentView.transform = state.transform; [state.superview addSubview:currentView]; for(UIView *view in _imgViews){ XHViewState *_state = [XHViewState viewStateForView:view]; view.userInteractionEnabled = _state.userInteratctionEnabled; } [currentView removeFromSuperview]; [self removeFromSuperview]; if([self.delegate respondsToSelector:@selector(imageViewer:willDismissWithSelectedView:)]) { [self.delegate imageViewer:self willDismissWithSelectedView:[self currentView]]; } } ]; } #pragma mark- Gesture events - (void)tappedScrollView:(UITapGestureRecognizer*)sender { [self prepareToDismiss]; [self dismissWithAnimate]; } - (void)didPan:(UIPanGestureRecognizer*)sender { static UIImageView *currentView = nil; if(sender.state == UIGestureRecognizerStateBegan){ currentView = [self currentView]; UIView *targetView = currentView.superview; while(![targetView isKindOfClass:[XHZoomingImageView class]]){ targetView = targetView.superview; } if(((XHZoomingImageView *)targetView).isViewing){ currentView = nil; } else{ UIWindow *window = [[[UIApplication sharedApplication] delegate] window]; currentView.frame = [window convertRect:currentView.frame fromView:currentView.superview]; [window addSubview:currentView]; [self prepareToDismiss]; } } if(currentView){ if(sender.state == UIGestureRecognizerStateEnded){ if(_scrollView.alpha>0.5){ [self showWithSelectedView:currentView]; } else{ [self dismissWithAnimate]; } currentView = nil; } else{ CGPoint p = [sender translationInView:self]; CGAffineTransform transform = CGAffineTransformMakeTranslation(0, p.y); transform = CGAffineTransformScale(transform, 1 - fabs(p.y)/1000, 1 - fabs(p.y)/1000); currentView.transform = transform; CGFloat r = 1-fabs(p.y)/200; _scrollView.alpha = MAX(0, MIN(1, r)); } } } @end