使 UIView 可缩放

发布于 2024-10-08 20:11:58 字数 1694 浏览 4 评论 0原文

我正在 iPhone 上使用 UIScrollView，并且我希望能够缩放 UIView。

我的 UIView 是 ma uiscrollview 的子视图。如果我返回视图，当我尝试缩放时，我的视图会移动但不会缩放：

- (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; }

例如，如果我用标签替换我的视图：

 - (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; }

缩放效果很好。我的标签被放大了。

你知道为什么它适用于标签但不适用于 UIView 吗？

谢谢

你吗

原文

I am using the UIScrollView on iphone, and I want to be able to zoom on an UIView.

my UIView is a subview of ma uiscrollview. If I return the view, when I tried to zoom, my view move but dont zoom :

- (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; }

if I replace my view by a label for exemple :

 - (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; }

the zoom works well. My label magnified.

Do you have any idea why it's working for a label but not for an UIView?

thanks

Do you

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高速公鹿 2024-10-15 20:11:58

您是否实现了 scrollViewDidEndZooming:withView:atScale: ？我还注意到您注释掉了初始化 minimumZoomScale 和 maximumZoomScale 的代码。最好正确设置。

来自 UIScrollView 类参考：

为了进行缩放和平移，
委托必须同时实现
viewForZoomingInScrollView： 和
scrollViewDidEndZooming:withView:atScale:;
此外，最大
（最大缩放比例）和最小（
minimumZoomScale）缩放比例必须不同。