How to dismiss UIAlertController when tap outside the UIAlertController?

Question

How to dismiss UIAlertController when tap outside the UIAlertController?

I can add a UIAlertAction of style UIAlertActionStyleCancel to dismiss the UIAlertController.

But I want to add the function that when user tap outside the UIAlertController the UIAlertController will dismiss. How to do that? Thank you.

Answer 1

Add a separate cancel action with style UIAlertActionStyleCancel. So that when user taps outside, you would get the callback.

Obj-c

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Alert Title" message:@"A Message" preferredStyle:UIAlertControllerStyleActionSheet]; [alertController addAction:[UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {  // Called when user taps outside }]]; 

Swift 5.0

let alertController = UIAlertController(title: "Alert Title", message: "A Message", preferredStyle: .actionSheet)              alertController.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: {      action in          // Called when user taps outside })) 

Answer 2

If you are targeting devices having iOS > 9.3 and using Swift and preferredStyle is Alert you can use snippet as below:

func showAlertBtnClicked(sender: UIButton) {     let alert = UIAlertController(title: "This is title", message: "This is message", preferredStyle: .Alert)     self.presentViewController(alert, animated: true, completion:{         alert.view.superview?.userInteractionEnabled = true         alert.view.superview?.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(self.alertControllerBackgroundTapped)))     }) }  func alertControllerBackgroundTapped() {     self.dismissViewControllerAnimated(true, completion: nil) } 

With swift 3:

func showAlertBtnClicked(sender: UIButton) {     let alert = UIAlertController(title: "This is title", message: "This is message", preferredStyle: .alert)     self.present(alert, animated: true) {         alert.view.superview?.isUserInteractionEnabled = true         alert.view.superview?.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(self.alertControllerBackgroundTapped)))     } }  func alertControllerBackgroundTapped() {     self.dismiss(animated: true, completion: nil) }