ScrollView常用代理方法:

#pragma mark - 滚动结束调用
-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView {// 计算 滑动到了第几页double page = scrollView.contentOffset.x / scrollView.width;self.pageControl.currentPage = (int)(page + 0.5);
}

// 只要滚动了就会调用
- (void)scrollViewDidScroll:(UIScrollView *)scrollView {NSLog(@"ContentOffset  x is  %f,yis %f",scrollView.contentOffset.x,scrollView.contentOffset.y);}

 

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#pragma mark - 将开始降速时
- (void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView {
    
    NSLog(@"开始减速了");
    
}

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#pragma mark - 拖的过程 手指离开调用
- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate {
    
    NSLog(@"手指离开了");
    
}

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#pragma mark - 手指开始 滑动调用
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView {
    
    NSLog(@"手指滑动了");
    
}

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