製作UIView可縮放

Question

我在iPhone上使用UIScrollView，我希望能夠放大UIView。

我的UIView是mauiscrollview的子視圖。如果我回到來看，當我試圖放大，我認爲舉動，但不變焦：

- (void)viewDidLoad { 
[super viewDidLoad]; 

//mon label peut prendre la valeur de mon menu 
[monLabel setText:monMenu]; 
CGRect frame = CGRectMake(1, 1, 320, 480); // Replacing with your dimensions 
maVue = [[UIView alloc] initWithFrame:frame]; 
maVue.userInteractionEnabled = YES; 
scrollView.contentSize = CGSizeMake(320, 480); 
scrollView.bounces = YES; 
//scrollView.bouncesZoom = YES; 
scrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite; 
scrollView.scrollEnabled = YES; 
//scrollView.minimumZoomScale = 1.0; 
//scrollView.maximumZoomScale = 5.0; 
scrollView.delegate = self; 
[scrollView addSubview:maVue]; 

} 

- (UIView *)viewForZoomingInScrollView:(UIScrollView 
*)scrollView{ return maVue; } 

如果我代替我的看法由標籤爲例：

- (void)viewDidLoad { 
    [super viewDidLoad]; 

//mon label peut prendre la valeur de mon menu 
[monLabel setText:monMenu]; 
CGRect frame = CGRectMake(1, 1, 320, 480); // Replacing with your dimensions 
maVue = [[UIView alloc] initWithFrame:frame]; 
maVue.userInteractionEnabled = YES; 
scrollView.contentSize = CGSizeMake(320, 480); 
scrollView.bounces = YES; 
//scrollView.bouncesZoom = YES; 
scrollView.indicatorStyle = UIScrollViewIndicatorStyleWhite; 
scrollView.scrollEnabled = YES; 
//scrollView.minimumZoomScale = 1.0; 
//scrollView.maximumZoomScale = 5.0; 
scrollView.delegate = self; 
[scrollView addSubview:monLabel]; 

} 

- (UIView *)viewForZoomingInScrollView:(UIScrollView 
*)scrollView{ return monLabel; } 

變焦效果很好。我的標籤被放大了。

你知道爲什麼它可以用於標籤，但不適用於UIView嗎？

感謝

你

Answer 1

你實現scrollViewDidEndZooming:withView:atScale:？我還注意到，你註釋了初始化minimumZoomScale和maximumZoomScale的代碼。最好正確設置。

從UIScrollView Class Reference：

進行縮放和平移工作， 委託必須實現都 viewForZoomingInScrollView:和 scrollViewDidEndZooming:withView:atScale:; 此外，最大 （maximumZoomScale）和最小值（ minimumZoomScale）縮放比例必須不同。