In swift， How to keep a UIViewController().view at the top？like UIAlertController

Question

I'm using CustomAlertViewController as an Alert on UIViewController. Current code snippet to present CustomAlertViewController -

CustomAlertViewController: UIViewController {}
self.present(CustomAlertViewController(), animated: true, completion: {})

But I want to addCustomAlertViewControlleron top of the view hierarchy.

Any suggestion how to achieve this?

What? Explain why you need to do that – Robert Dresler Mar 21 '19 at 06:03 — Robert Dresler, Mar 21 '19 at 06:03
add in `Window` rather than present it on `viewController`. – Amir Khan Mar 21 '19 at 06:40 — Amir Khan, Mar 21 '19 at 06:40

score 0 · Answer 1 · answered Mar 21 '19 at 06:43

0

Probably you want to add your UIViewCotroller’s view as a subview of key window. Check this answer: https://stackoverflow.com/a/38540271/5779168

answered Mar 21 '19 at 06:43

tahavath

234
2
9

but this view cant controller – Erwin Mar 21 '19 at 07:51

score 0 · Accepted Answer · answered Mar 21 '19 at 08:04

extension UIViewController {
  func showAlertConfirm(errorMessage: String, operation: @escaping ()->()) {
  let alert = UIAlertController(title: "Confirmation", message: errorMessage, 
  preferredStyle: .alert)

  let confirmationAction = UIAlertAction(title: "OK", style: .default) { (action) 
         in
           operation()
   }
 let cancelAction = UIAlertAction(title: "Cancel", style: .cancel, handler:nil)
    alert.addAction(confirmationAction)
    alert.addAction(cancelAction)
    present(alert, animated: true, completion: nil)
        } 
 }

if you call this function

 showAlertConfirm(errorMessage: "Test", operation:
    requestData()
)

In swift， How to keep a UIViewController().view at the top？like UIAlertController

2 Answers2