closures外部轻按iOS 8的模式表单视图

我一直试图解雇iOS 8没有运气的外部模式表单视图，我试过这个代码

UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTapBehind:)]; [recognizer setNumberOfTapsRequired:1]; recognizer.cancelsTouchesInView = NO; //So the user can still interact with controls in the modal view [self.view.window addGestureRecognizer:recognizer]; - (void)handleTapBehind:(UITapGestureRecognizer *)sender { if (sender.state == UIGestureRecognizerStateEnded) { CGPoint location = [sender locationInView:nil]; //Passing nil gives us coordinates in the window //Then we convert the tap's location into the local view's coordinate system, and test to see if it's in or outside. If outside, dismiss the view. if (![self.view pointInside:[self.view convertPoint:location fromView:self.view.window] withEvent:nil]) { // Remove the recognizer first so it's view.window is valid. [self.view.window removeGestureRecognizer:sender]; [self dismissModalViewControllerAnimated:YES]; } } } 

但是它没有检测到外部的点击，有什么build议吗？

Answer 1

在iOS 8中实际存在两个问题。首先，手势识别不开始。

我通过添加UIGestureRecognizerDelegate协议和实现来解决这个问题

 -(BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer*)otherGestureRecognizer { return YES; } 

此外，不要忘记注册代表

 recognizer.delegate = self; 

现在手势识别器应该识别手势，并且将调用目标方法（ handleTapBehind: 。

这里是iOS 8中的第二个问题： locationInView:如果将nil作为视图传递，似乎不考虑设备方向。 相反，传递根视图的作品。

这是我的目标代码，似乎适用于iOS 7.1和8.0：

 if (sender.state == UIGestureRecognizerStateEnded) { UIView *rootView = self.view.window.rootViewController.view; CGPoint location = [sender locationInView:rootView]; if (![self.view pointInside:[self.view convertPoint:location fromView:rootView] withEvent:nil]) { [self dismissViewControllerAnimated:YES completion:^{ [self.view.window removeGestureRecognizer:sender]; }]; } } 

Answer 2

在iOS 8中，你可以看看使用新的UIPresentationController类。 它使您可以更好地控制自定义视图控制器演示文稿周围的容器（使您可以正确添加自己的手势识别器）。

这里是一个相当简单的教程链接： http : //dativestudios.com/blog/2014/06/29/presentation-controllers/

然后添加调光视图点击closures：

  UITapGestureRecognizer *singleFingerTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleSingleTap:)]; [self.dimmingView addGestureRecognizer:singleFingerTap]; - (void)handleSingleTap:(UITapGestureRecognizer *)recognizer { [self.presentingViewController dismissViewControllerAnimated:YES completion:nil]; } 

Answer 3

Swift 3.1解决scheme可以在纵向和横向上工作。

 class TapBehindModalViewController: UIViewController, UIGestureRecognizerDelegate { private var tapOutsideRecognizer: UITapGestureRecognizer! override func viewDidAppear(_ animated: Bool) { super.viewDidAppear(animated) if(self.tapOutsideRecognizer == nil) { self.tapOutsideRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.handleTapBehind)) self.tapOutsideRecognizer.numberOfTapsRequired = 1 self.tapOutsideRecognizer.cancelsTouchesInView = false self.tapOutsideRecognizer.delegate = self self.view.window?.addGestureRecognizer(self.tapOutsideRecognizer) } } override func viewWillDisappear(_ animated: Bool) { super.viewWillDisappear(animated) if(self.tapOutsideRecognizer != nil) { self.view.window?.removeGestureRecognizer(self.tapOutsideRecognizer) self.tapOutsideRecognizer = nil } } func close(sender: AnyObject) { self.dismiss(animated: true, completion: nil) } // MARK: - Gesture methods to dismiss this with tap outside func handleTapBehind(sender: UITapGestureRecognizer) { if (sender.state == UIGestureRecognizerState.ended) { let location: CGPoint = sender.location(in: self.view) if (!self.view.point(inside: location, with: nil)) { self.view.window?.removeGestureRecognizer(sender) self.close(sender: sender) } } } func gestureRecognizer(_ gestureRecognizer: UIGestureRecognizer, shouldRecognizeSimultaneouslyWith otherGestureRecognizer: UIGestureRecognizer) -> Bool { return true } }