概述
-
UIScrollView允许滚动和缩放其包含的视图的视图。
属性和方法
初始化方法
UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height)];
设置偏移量
scrollView.contentSize = CGSizeMake([UIScreen mainScreen].bounds.size.width * 5, [UIScreen mainScreen].bounds.size.height);
设置视图是否支持滑动到最顶端
scrollView.scrollsToTop = YES;
设置是否反弹
scrollView.bounces = NO;
设置是否分页
scrollView.pagingEnabled = YES;
设置是否可以滚动
scrollView.scrollEnabled = NO;
设置是否显示滚动条
scrollView.showsHorizontalScrollIndicator = NO;
设置滚动条的样式
scrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite;
设置内容的边缘和Indicators边缘
scrollView.contentInset = UIEdgeInsetsMake(0, 50, 50, 0);
scrollView.scrollIndicatorInsets = UIEdgeInsetsMake(0, 50, 0, 0);
提示用户,Indicators flash
[scrollView flashScrollIndicators];
是否同时运动,lock
scrollView.directionalLockEnabled = YES;
代理方法
当视图开始滚动时执行此代理方法
-(void)scrollViewDidScroll:(UIScrollView *)scrollView
当视图即将开始被拖拽时执行的代理方法
-(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
当视图结束拖拽时执行的代理方法
- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate
当视图减速停止时执行的代理方法
-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
当视图开始减速时执行的代理方法
-(void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView
是否支持滑动到顶部
- (BOOL)scrollViewShouldScrollToTop:(UIScrollView *)scrollView
视图已经放大或缩小
- (void)scrollViewDidZoom:(UIScrollView *)scrollView
缩放结束时执行的代理方法
- (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(float)scale
视图开始放大或者缩小时执行的代理方法
- (void)scrollViewWillBeginZooming:(UIScrollView *)scrollView withView:
(UIView *)view
返回一个放大或者缩小的视图
- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
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