UIPopoverPresentationController不会在标题视图上禁用轻击手势

Question

我有视图控制器，其导航栏包含处理轻击手势的标题视图。另外还有一个rightBarButtonItem，它在iPad上显示UIAlertController作为弹出窗口。示例代码如下：

- (void)viewDidLoad { 
    [super viewDidLoad]; 

    self.view.backgroundColor = UIColor.whiteColor; 

    UILabel *titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 100, 30)]; 
    titleLabel.text = @"Popover test"; 
    titleLabel.backgroundColor = UIColor.greenColor; 
    titleLabel.userInteractionEnabled = YES; 
    [titleLabel addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(titleLabelPress)]]; 

    self.navigationItem.titleView = titleLabel; 

    self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd 
                          target:self 
                          action:@selector(showPopover)]; 
} 

- (void)showPopover { 
    UIAlertController *controller = [UIAlertController alertControllerWithTitle:nil 
                     message:nil 
                   preferredStyle:UIAlertControllerStyleActionSheet]; 
    controller.popoverPresentationController.barButtonItem = self.navigationItem.rightBarButtonItem; 

    [controller addAction:[UIAlertAction actionWithTitle:@"One" style:UIAlertActionStyleDefault handler:nil]]; 
    [controller addAction:[UIAlertAction actionWithTitle:@"Two" style:UIAlertActionStyleDefault handler:nil]]; 

    [self presentViewController:controller animated:YES completion:nil]; 
} 

- (void)titleLabelPress { 
    BOOL isYellow = [((UILabel *)self.navigationItem.titleView).backgroundColor isEqual:UIColor.yellowColor]; 
    ((UILabel *)self.navigationItem.titleView).backgroundColor = isYellow ? UIColor.greenColor : UIColor.yellowColor; 
} 

问题是当popover呈现时，我仍然能够点击标题标签和弹出窗口不会解雇。另外，如果我点击状态栏popover不会解雇。这个问题的原因是什么？

Answer 1

据当时回答：

UIPopoverController does not dismiss when clicking on the NavigationBar

UIPopoverController似乎呈现时，导航栏添加到其 passthroughViews阵列。

解决的办法是要做到：

[self presentViewController:controller animated:YES completion:^{ 
    controller.popoverPresentationController.passthroughViews = nil; 
}];