UIAlertController在外部点击时处理解除（IPad）-UIAlertControllerhandledismissuponclickoutside(IPad)

41  

You can add an action with style:UIAlertActionStyleCancel and the handler for this action is called when the user taps outside the popup.

您可以使用样式添加动作：UIAlertActionStyleCancel，当用户点击弹出窗口时，将调用此动作的处理程序。

if ([UIAlertController class]) {
    UIAlertController *alertCOntroller= [UIAlertController alertControllerWithTitle:@"Alert Title" message:@"A Message" preferredStyle:UIAlertControllerStyleActionSheet];

    [alertController addAction:[UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
        NSLog(@"User clicked button called %@ or tapped elsewhere",action.title);
    }]];

    [alertController addAction:[UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
        NSLog(@"User clicked button called %@",action.title);
    }]];

    [alertController addAction:[UIAlertAction actionWithTitle:@"Other" style:UIAlertActionStyleDestructive handler:^(UIAlertAction *action) {
        NSLog(@"User clicked button called %@",action.title);
    }]];

    UIControl *aCOntrol= (UIControl *) sender;
    CGRect frameInView = [aControl convertRect:aControl.bounds toView:self.view];
    alertController.popoverPresentationController.sourceRect = frameInView;
    alertController.popoverPresentationController.sourceView = self.view;
    alertController.popoverPresentationController.permittedArrowDirectiOns= UIPopoverArrowDirectionAny;
    [self presentViewController:alertController animated:YES completion:nil];
}

16  

The solution which works for UIAlertController with alert style. Just needed to add gesture recognizer to alertController superview.

适用于具有警报风格的UIAlertController的解决方案。只需要为alertController superview添加手势识别器。

    [self presentViewController: alertController
                   animated: YES
                 completion:^{
                     alertController.view.superview.userInteractiOnEnabled= YES;
                     [alertController.view.superview addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget: self action: @selector(alertControllerBackgroundTapped)]];
                 }];

- (void)alertControllerBackgroundTapped
{
    [self dismissViewControllerAnimated: YES
                             completion: nil];
}

1  

UITapGestureRecognizer didn't work for me so I've used this way:

UITapGestureRecognizer对我不起作用所以我用这种方式：

func addDismissControl(_ toView: UIView) {
    let dismissCOntrol= UIControl()
    dismissControl.addTarget(self, action: #selector(self.dismissAlertController), for: .touchDown)
    dismissControl.frame = toView.superview?.frame ?? CGRect.zero
    toView.superview?.insertSubview(dismissControl, belowSubview: toView)
}

func dismissAlertController() {
    self.dismiss(animated: true, completion: nil)
}

func presentAlertController(title: String?, message: String?, preferredStyle: UIAlertControllerStyle,  handler: ((UIAlertAction) -> Swift.Void)? = nil, completion: (() -> Swift.Void)? = nil) {

    let alertCOntroller= UIAlertController(title: title, message: nil, preferredStyle: .actionSheet)
    alertController.addAction(UIAlertAction(title: "OK", style: .default) { (alertAction) -> Void in
        handler?(alertAction)
    })

    self.present(alertController, animated: true, completion: {
        self.addDismissControl(alertController.view)
        completion?()
    })
}

func someWhereInYourViewController() {
    // ...
    presentAlertController(title: "SomeTitle", message: "SomeMessage", preferredStyle: .actionSheet, handler: { (alertAction) -> Void in
        //do some action
    }, completion: {
        //do something after presentation
    })
    // ...
}