UIAlertController and UIViewAlertForUnsatisfiableConstraints error

Question

I upgraded to Xcode 10.2 yesterday and started using Swift 5 and notice this error when bringing up my UIAlertController photo prompt. I don't remember seeing it in Xcode 10.1

Will attempt to recover by breaking constraint  <NSLayoutConstraint:0x600001321e00 UIView:0x7fe1246070a0.width == - 16   (active)>  Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger. 

I read this issue How to trap on UIViewAlertForUnsatisfiableConstraints? and was able to pin point the error to my UIAlertController (highlighted in red)

Here's my code:

  @objc private func promptPhoto() {      let prompt = UIAlertController(title: "Choose a Photo",                                    message: "",                                    preferredStyle: .actionSheet)      let imagePicker = UIImagePickerController()     imagePicker.delegate = self      let camerAction = UIAlertAction(title: "Camera", style: .default) { _ in       guard self.isCameraAccessible() else {         self.showAlert(title: "Oops", message: "Camera is not available")         return       }       imagePicker.sourceType = .camera       imagePicker.allowsEditing = true       self.present(imagePicker, animated: true)     }      let libraryAction = UIAlertAction(title: "Photo Library", style: .default) { _ in       imagePicker.sourceType = .photoLibrary       imagePicker.allowsEditing = true       self.present(imagePicker, animated: true)     }      let cancelAction = UIAlertAction(title: "Cancel",                                      style: .cancel,                                      handler: nil)      prompt.addAction(camerAction)     prompt.addAction(libraryAction)     prompt.addAction(cancelAction)      present(prompt, animated: true) {       // Prevent closing the prompt by touch up outside the prompt.       prompt.view.superview?.subviews[0].isUserInteractionEnabled = false     }    } 

I've tried playing around setting the width of my UIAlertController by using this code inside my promptPhoto() method to no avail.

let width: NSLayoutConstraint = NSLayoutConstraint(item: prompt.view!,                                                    attribute: NSLayoutConstraint.Attribute.width,                                                    relatedBy: NSLayoutConstraint.Relation.equal,                                                    toItem: nil,                                                    attribute: NSLayoutConstraint.Attribute.notAnAttribute,                                                    multiplier: 1,                                                    constant: self.view.frame.width)   prompt.view.addConstraint(width)  

Is there a way to control the UIAlertController width so that I could get rid of my error message?

Thank you in advance.

Answer 1

This may be a Xcode bug.Still apple haven't fix that.this error occurred latest xcode 11.3.1 also