// // SelecterContentScrollView.m // SelecterTools // // Created by zhao on 16/3/15. // Copyright © 2016年 xincheng. All rights reserved. // #import "SelecterContentScrollView.h" #define WIDTH [UIScreen mainScreen].bounds.size.width #define HEIGHT [UIScreen mainScreen].bounds.size.height @interface SelecterContentScrollView () @property(nonatomic,retain)NSArray *vcArr; @property(nonatomic,copy)ScrollPage scrollPage; @end @implementation SelecterContentScrollView -(instancetype)initWithSeleterConditionTitleArr:(NSArray *)vcArr andBtnBlock:(ScrollPage)page { self = [super init]; if (self) { self.frame = CGRectMake(0,104,WIDTH,HEIGHT-self.frame.origin.y); self.backgroundColor = [UIColor whiteColor]; _vcArr = vcArr; [self lazyLoadVcFromIndex:0]; self.pagingEnabled = YES; self.contentSize = CGSizeMake(WIDTH * vcArr.count,self.frame.size.height); self.delegate = self; self.scrollPage = page; } return self; } -(void)updateVCViewFromIndex:(NSInteger )index { // [self lazyLoadVcFromIndex:index]; [self setContentOffset:CGPointMake(index*WIDTH, 0) animated:YES]; } //懒加载策略 -(void)lazyLoadVcFromIndex:(NSInteger )index { UIViewController *vc = _vcArr[index]; vc.view.frame = CGRectMake(WIDTH*index,0, WIDTH,self.frame.size.height); [self addSubview:vc.view]; } -(void)scrollViewDidScroll:(UIScrollView *)scrollView { int page = (scrollView.contentOffset.x+WIDTH/2)/WIDTH; [self lazyLoadVcFromIndex:page]; self.scrollPage(page); } /* // Only override drawRect: if you perform custom drawing. // An empty implementation adversely affects performance during animation. - (void)drawRect:(CGRect)rect { // Drawing code } */ @end