在 iPad 中使用 NavigationController 解除 ModalViewController 当在视图外点击时

Posted 2023-02-23

【中文标题】在 iPad 中使用 NavigationController 解除 ModalViewController 当在视图外点击时

【英文标题】：Dismiss ModalViewController with NavigationController in iPad When tap outside the view

【发布时间】：2012-05-13 14:00:18

【问题描述】：

所以我通常按照这种方式在 ModalViewController 的视图外点击时关闭它

- (void)viewDidAppear:(BOOL)animated

    [super viewDidAppear:animated];

    if(UIUserInterfaceIdiomPad == UI_USER_INTERFACE_IDIOM())
    
        if(![self.view.window.gestureRecognizers containsObject:recognizer])
        
            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];
            [recognizer release];
        
    


- (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]) 
        
            [self dismissModalViewControllerAnimated:YES];
            [self.view.window removeGestureRecognizer:recognizer];
        
    

它与 regular ModalViewController 一起工作得很好。但是现在我有一个 modelViewController，它是一个以“x”viewController 作为根的 NavigationViewController .. 当我使用这种方式并点击导航栏时控制器被解除，或者当我从 x 控制器导航到“y”控制器并想要返回时，当我单击后退按钮时，ModalView 被解除！这对我来说是错误的行为..我只想关闭控制器，以防点击完全在控制器之外（视图区域 + 导航栏区域）.. 任何人都可以提供帮助吗？

【参考方案1】：

更新您的代码如下：

- (void)handleTapBehind:(UITapGestureRecognizer *)sender

    if (sender.state == UIGestureRecognizerStateEnded)
    
        CGPoint flocation = [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.

        CGPoint tap = [self.view convertPoint:flocation fromView:self.view.window];
        CGPoint tapBar = [self.navigationController.navigationBar convertPoint:flocation fromView:self.view.window];
        if (![self.view pointInside:tap withEvent:nil] && ![self.navigationController.navigationBar pointInside:tapBar withEvent:nil])
        
            // Remove the recognizer first so it's view.window is valid.
            [self.view.window removeGestureRecognizer:sender];
            [self dismissModalViewControllerAnimated:YES];
        
    

点击 UIBarButtonItem 时从窗口中移除 UITapGestureRecognizer

-(void)viewWillDisappear:(BOOL)animated 
    [self.view.window removeGestureRecognizer:self.tapOutsideGestureRecognizer];