如何阻止从superview到子视图的手势？ [英] How to block a gesture from superview to subview?

问题描述

我正在编写一个模块，每当我在视图上滑动时，将添加两个具有视图的一半大小的子视图。这些子视图有自己的手势（例如：pan，...）。我第一次滑动，没关系，因为没有创建子视图。但是一旦创建了子视图，每次我滑动时，滑动手势都会传递到其子视图。 :(，所以我必须滑动2次才能分开。

I'm writing a module that everytime I swipe on a view, two sub views with a half size of the view will be added. Those subviews have their own gestures (eg: pan,...). The first time I swipe, it's OK because none of subview has been created. But once the subview been created, everytime I swipe, the swipe gesture is alway pass to its subviews. :(, so I have to swipe 2 times to divide.

我想知道有没有办法阻止滑动传递给它的子视图？谢谢。

I want to know is there any way to block swipe passing to its subview? Thank you.

UPDATE

我使用了shouldRecognizeSimultaneouslyWithGestureRecognizer使这些手势同时工作。但是仍然有一些问题。父视图有它的滑动手势，子视图有Pan手势。由于我使用souldRecognizeSimultaneouslyWithGestureRecognizer，有时当我平移时，滑动手势会触发。所以，你知道如何在Pan处于活动状态时禁用Swipe吗？

UPDATE
I used shouldRecognizeSimultaneouslyWithGestureRecognizer to make those gestures work simultaneously. But there's still have some problems. The parent view have its Swipe gesture, the subview have its Pan gesture. Since I use souldRecognizeSimultaneouslyWithGestureRecognizer, sometime when I'm panning, the swipe gesture triggers. So, you know how to disable Swipe while Pan is active in this situation?

推荐答案

你必须实现UIGestureRecognizerDelegate方法：

You have to implement the UIGestureRecognizerDelegate method:

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer;

并添加你的控制器作为手势的代表然后，当两个手势识别器响应一个手势时，将调用此方法，在这里您可以实现您想要的应用程序逻辑。

And add your controller as the delegate of the gesture recognizers. Then, when two gesture recognizers respond to a gesture, this method will be called and here you can implement the logic you want for your app.

在界面声明中您必须键入的控制器：

In the interface declaration of the controller you have to type:

@interface testcViewController () <UIGestureRecognizerDelegate>

然后，在创建手势识别器时：

Then, when creating the gesture recognizer:

UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipe)];
swipe.direction = UISwipeGestureRecognizerDirectionDown;
swipe.delegate = self;
[self.view addGestureRecognizer:swipe];

然后，最后，将此方法添加到控制器：

And then, finally, you add this method to the controller:

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
    BOOL shouldInteract = NO;
    //Here you decide whether or not the two recognizers whould interact.
    return shouldInteract;
}

编辑
您还可以实施

EDIT You can also implement

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer;

在此处，检测您是否已经提交了子视图，并阻止了您想要的任何手势。

And here, detect if you have already presented the subviews, and block any gesture you want.

这篇关于如何阻止从superview到子视图的手势？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！