Presenting a UIAlertController over a modally presented UIViewController does not correctly update the tintAdjustmentMode of the view controller

Number:rdar://51354714 Date Originated:6/3/19
Status: Resolved:
Product:iOS Product Version:12.3.1
Classification:UIKit Reproducible:Yes


When a view controller presents a UIAlertController, the view controller's view ordinarily dims any controls (buttons, etc) via the tintAdjustmentMode being set to .dimmed.

If the view controller has been modally presented, this does not happen.

Steps to Reproduce:

1. Present a view controller modally. The view controller should include some tinted control, for example a button.
2. Present a UIAlertController from the modally presented view controller.

Expected Results:

The button is dimmed when the alert controller is presented.

Actual Results:

The button is not dimmed.


iOS 12.3.1, Xcode 10


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