UIPopoverPresentationController不会在标题视图上禁用点击手势

Question

我有带有导航栏的视图控制器，其中包含处理轻击手势的标题视图。还有一个rightBarButtonItem在iPad上显示UIAlertController为弹出框。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出现时我仍然能够点击标题标签并且popover不会被解雇。此外，如果我点击状态栏popover不会被解雇。这个问题可能是什么原因？

Answer 1

根据答案：

UIPopoverController does not dismiss when clicking on the NavigationBar

  

UIPopoverController似乎将导航栏添加到其中   passthroughViews数组出现时。

解决方案是：

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