UIPageViewController手势识别器 [英] UIPageViewController Gesture recognizers

问题描述

我已经在申请了一段时间，但由于NDA，我无法提出这个问题。

I've been working on an application for a while now, but I couldn't ask this question due to the NDA.

我的ViewController加载了UIPageViewController。视图控制器具有由PageViewControllers手势识别器覆盖的按钮。例如，我在viewcontroller的右侧有一个按钮，当你按下按钮时，PageViewController接管并更改页面。

I have a UIPageViewController load with my Viewcontroller. The view controllers have buttons which are overridden by the PageViewControllers gesture recognizers. For example I have a button on the right side of the viewcontroller and when you press the button, the PageViewController takes over and changes the page.

如何制作按钮接收触摸并取消PageViewController中的手势识别器？

How can I make the button receive the touch and cancel the gesture recognizer in the PageViewController?

我认为PageViewController使我的ViewController成为其视图的子视图。

I think the PageViewController makes my ViewController a subview of its view.

我知道我可以关闭所有的手势，但这不是我想要的效果。

I know I could turn off all of the Gestures, but this isn't the effect I'm looking for.

我会更喜欢不要将PageViewController子类化，因为apple说这个类不是要子类化的。

I would prefer not to subclass the PageViewController as apple says this class is not meant to be subclassed.

推荐答案

你可以覆盖

-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer
 shouldReceiveTouch:(UITouch *)touch

更好地控制PageViewController何时应该接收触摸而不是。请参阅 Dev API手势识别器

to better control when the PageViewController should receive the touch and not. Look at "Preventing Gesture Recognizers from Analyzing Touches" in Dev API Gesture Recognizers

我的解决方案如下所示UIPageViewController的RootViewController：

My solution looks like this in the RootViewController for the UIPageViewController:

在viewDidLoad中：

In viewDidLoad:

//EDITED Need to take care of all gestureRecogizers. Got a bug when only setting the delegate for Tap
for (UIGestureRecognizer *gR in self.view.gestureRecognizers) {
    gR.delegate = self;
}

覆盖：

-(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch {
    //Touch gestures below top bar should not make the page turn.
    //EDITED Check for only Tap here instead.
    if ([gestureRecognizer isKindOfClass:[UITapGestureRecognizer class]]) {
        CGPoint touchPoint = [touch locationInView:self.view];
        if (touchPoint.y > 40) {
            return NO;
        }
        else if (touchPoint.x > 50 && touchPoint.x < 430) {//Let the buttons in the middle of the top bar receive the touch
            return NO;
        }
    }
    return YES;
}

并且不要忘记将RootViewController设置为UIGestureRecognizerDelegate。

And don't forget to set the RootViewController as UIGestureRecognizerDelegate.

（仅供参考，我只是在横向模式下。）

(FYI, I'm only in Landscape mode.)

编辑 - 上面的代码翻译成Swift 2：

EDIT - The above code translated into Swift 2:

在viewDidLoad中：

In viewDidLoad:

for gr in self.view.gestureRecognizers! {
    gr.delegate = self
}

使页面视图控制器继承 UIGestureRecognizerDelegate 然后添加：

Make the page view controller inherit UIGestureRecognizerDelegate then add:

func gestureRecognizer(gestureRecognizer: UIGestureRecognizer, shouldReceiveTouch touch: UITouch) -> Bool {
    if let _ = gestureRecognizer as? UITapGestureRecognizer {
        let touchPoint = touch .locationInView(self.view)
        if (touchPoint.y > 40 ){
            return false
        }else{
            return true
        }
    }
    return true
}

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