UIScrollView 滚动视图

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属性

• 创建

UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320, 460)];

• backgroundColor————背景颜色

scrollView.backgroundColor = [UIColor redColor];

• contentSize————设置内容的大小

scrollView.contentSize = CGSizeMake(320, 400);

• bounces————是否开启弹簧效果

scrollView.bounces = NO;

• pagingEnabled————是否分页

scrollView.pagingEnabled = YES;

• scrollEnabled————是否滚动

scrollView.scrollEnabled = NO;

• showsVerticalScrollIndicator————是否显示竖直滚动条

scrollView.showsVerticalScrollIndicator = NO;

• showsHorizontalScrollIndicator————是否显示水平滚动条

scrollView.showsHorizontalScrollIndicator = NO;

• indicator————指示器风格

scrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite;

• contentInset————设置内容的边缘

scrollView.contentInset = UIEdgeInsetsMake(0, 50, 50, 0);

• scrollIndicatorInsets————设置指示器的边缘

scrollView.scrollIndicatorInsets = UIEdgeInsetsMake(0, 50, 0, 0);

• flashScrollIndicators————提示用户指标闪光

[scrollView flashScrollIndicators];

• directionalLockEnabled————是否同时运动

scrollView.directionalLockEnabled = YES;

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方法及代理

• 返回一个放大或者缩小的视图

-(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView{}

• 开始放大或者缩小

-(void)scrollViewWillBeginZooming:(UIScrollView *)scrollView withView:
(UIView *)view{}

• 缩放结束时

-(void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(float)scale{}

• 视图已经放大或缩小

-(void)scrollViewDidZoom:(UIScrollView *)scrollView{
NSLog(@"scrollViewDidScrollToTop");
}

• 是否支持滑动至顶部

-(BOOL)scrollViewShouldScrollToTop:(UIScrollView *)scrollView{
return YES;
}

• 滑动到顶部时调用该方法

-(void)scrollViewDidScrollToTop:(UIScrollView *)scrollView{
NSLog(@"scrollViewDidScrollToTop");
}

• 滑动时调用

-(void)scrollViewDidScroll:(UIScrollView *)scrollView{
NSLog(@"scrollViewDidScroll");
}

• 拖动时调用

-(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView{
NSLog(@"scrollViewWillBeginDragging");
}

• 结束拖动时调用

-(void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate{
NSLog(@"scrollViewDidEndDragging");
}

• 开始减速时调用（以下两个方法注意与以上两个方法加以区别）

-(void)scrollViewWillBeginDecelerating:(UIScrollView *)scrollView{
NSLog(@"scrollViewWillBeginDecelerating");
}

• 减速停止时调用

-(void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{
NSLog(@"scrollViewDidEndDecelerating");
}