iOS：UIGestureRecognisers与Subviews的问题 [英] iOS: issues with UIGestureRecognisers vs Subviews

问题描述

我编写了以下代码，将手势识别器附加到多个图像视图。

I have written following code to attach gesture recogniser to multiple imageviews.

[imageview1 setUserInteractionEnabled:YES];
[imageview1 setMultipleTouchEnabled:YES];

[imageview2 setUserInteractionEnabled:YES];
[imageview2 setMultipleTouchEnabled:YES];

[imageview3 setUserInteractionEnabled:YES];
[imageview3 setMultipleTouchEnabled:YES];

[imageview4 setUserInteractionEnabled:YES];
[imageview4 setMultipleTouchEnabled:YES];

[imageview5 setUserInteractionEnabled:YES];
[imageview5 setMultipleTouchEnabled:YES];

[imageview6 setUserInteractionEnabled:YES];
[imageview6 setMultipleTouchEnabled:YES];

UILongPressGestureRecognizer *gestureRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(gestureHandler:)];
gestureRecognizer.delegate = self;
[imageview1 addGestureRecognizer:gestureRecognizer];
[imageview2 addGestureRecognizer:gestureRecognizer];
[imageview3 addGestureRecognizer:gestureRecognizer];
[imageview4 addGestureRecognizer:gestureRecognizer];
[imageview5 addGestureRecognizer:gestureRecognizer];
[imageview6 addGestureRecognizer:gestureRecognizer];

我注意到两个问题！

1. 所有imageview都没有附加手势识别器！只有一个imageview6（最后附加）具有手势识别器。这是苹果不允许的吗？

1. All imageview doens't have gesture recogniser attached! Only one imageview6(the last attached) has the gesture recogniser. Is this something apple doesn't allow?

我在父视图的子视图中拥有所有这些图像视图。当我将这些直接添加到父视图（self.view）时，它可以工作，但问题仍然是＃1。当我在子视图（self.view.mysubview）中有这些图像视图时，他们都没有识别出手势！

I have all these imageviews in subview of parent view. When I add these directly to parent view (self.view), it works but still issue#1 remains. When I have these imageviews in subview (self.view.mysubview), none of them recognise the gestures!

可能有人请告诉我如何处理这些问题。

Could someone please tell me how to deal with these issues please.

谢谢。

推荐答案

UIGestureRecognizer 一次只能附加到一个视图。您必须为每个图像视图创建一个单独的图像。

UIGestureRecognizers can only be attached to one view at a time. You will have to create a separate one for each image view.

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