objective-c 在 uiimageview 上无法识别点击手势
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tap gesture not recognized on uiimageview
提问by user2706770
I added two uiimageviews, one on another subview uiview(imageview1,imageview2). In the first view the top uiimageviewis hidden(imageview2) and in the second view the bottom imageviewis hidden(imageview1).
我添加了两个uiimageviews，一个在另一个subview uiview( imageview1,imageview2) 上。在第一个视图中，顶部uiimageview是隐藏的（imageview2），而在第二个视图中，底部imageview是隐藏的（imageview1）。
Allocating tap gesture:
分配点击手势：
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(oneTap:)];
UITapGestureRecognizer *singleTap1 = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(oneTap:)];
Set user interaction for both uiimageview to YES.
将 uiimageview 的用户交互设置为 YES。
[singleTap setNumberOfTapsRequired:1];
[singleTap1 setNumberOfTapsRequired:1];
// adding gesture to uiimageview
// 向 uiimageview 添加手势
Add tap gesture recognizer and selector respectively.
分别添加点击手势识别器和选择器。
[imageview1 addGestureRecognizer:singleTap];
[imageview2 addGestureRecognizer:singleTap1];
But my taps are not recognized.
但是我的水龙头无法识别。
Can any one tell me where the mistake is?
谁能告诉我错误在哪里？
回答by User 1531343
Try setting setUserInteractionEnabled:YESbefore adding gesture recognizer.
setUserInteractionEnabled:YES在添加手势识别器之前尝试设置。
[imageview1 setUserInteractionEnabled:YES]
[imageview2 setUserInteractionEnabled:YES]
[imageview1 addGestureRecognizer:singleTap];
[imageview2 addGestureRecognizer:singleTap1];
Update:
更新：
After the comment you have made I suggest you bring your views to the top before detecting the tap event. Because parent imageView is above and catches these taps.
在您发表评论之后，我建议您在检测点击事件之前将您的观点带到顶部。因为父 imageView 位于上方并捕获这些点击。
[yourparentview bringSubviewToFront:imageview1];
[yourparentview bringSubviewToFront:imageview2];
回答by n00bProgrammer
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(oneTap:)];
singleTap.numberOfTapsRequired = 1;
singleTap.numberOfTouchesRequired = 1;
singleTap.delegate = self;
[imageview1 addGestureRecogniser:singleTap];
[singleTap1 release];
imageview1.userInteractionEnabled = YES; //disabled by default
