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使用OS 3.1我在UIScrollView中放置了一个轻敲检测图像视图(取自Apple的Scroll View套件示例),并且想要在图像视图出现时放大两次图像视图。第一个缩放是为了使整个图像可见,第二个缩放是放大到指定的区域。我现在所拥有的是:背靠背UIScrollView缩放
- (void)viewDidLoad {
// After adding scroll view and image view
imageScrollView.minimumZoomScale = 0.5;
imageScrollView.maximumZoomScale = 2.75;
imageScrollView.zoomScale = 1.0;
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDelegate: self];
[imageScrollView zoomToRect:[imageView frame] animated:YES];
[UIView commitAnimations];
和下面以检测第一变焦结束,并触发第二:
- (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(float)scale {
selectedRect.origin.x = 60.0;
selectedRect.origin.y = 90.0;
selectedRect.size.width = 90.0;
selectedRect.size.height = 90.0;
imageScrollView.minimumZoomScale = 1.0;
imageScrollView.maximumZoomScale = 2.75;
imageScrollView.zoomScale = 2.5;
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationDelegate: self];
[imageScrollView zoomToRect:selectedRect animated:YES];
[UIView commitAnimations];
什么情况是,这会导致一个无限循环和滚动在两个放大点之间反复查看“摆动”。我应该做什么不同?谢谢。