Change status bar colour on iOS13

Question

Before iOS 13 I could change the status bar colour using the following bit of code:

        UIView statusBar = UIApplication.SharedApplication.ValueForKey(ne         


        

Answer 1

This also works, if used in ViewDidAppear override in a UIViewController. I previously tested in ViewWillAppear and even that was too soon to have a KeyWindow non-null:

public override void ViewDidAppear(bool animated)
{
    base.ViewDidAppear(animated);
    if (UIDevice.CurrentDevice.CheckSystemVersion(13, 0))
    {
        //Obj-C: 
        // UIView *statusBar = [[UIView alloc]initWithFrame:[UIApplication sharedApplication].keyWindow.windowScene.statusBarManager.statusBarFrame] ;
        // statusBar.backgroundColor = [UIColor redColor];
        // [[UIApplication sharedApplication].keyWindow addSubview:statusBar];

        // Xamarin.iOS: 
        UIView statusBar = new UIView(UIApplication.SharedApplication.KeyWindow.WindowScene.StatusBarManager.StatusBarFrame);
        statusBar.BackgroundColor = UIColor.Red;
        UIApplication.SharedApplication.KeyWindow.AddSubview(statusBar);
    }
    else
    {
        UIView statusBar = UIApplication.SharedApplication.ValueForKey(new NSString("statusBar")) as UIView;
        if (statusBar.RespondsToSelector(new ObjCRuntime.Selector("setBackgroundColor:")))
        {
            statusBar.BackgroundColor = UIColor.Red;
            statusBar.TintColor = UIColor.White;
            UIApplication.SharedApplication.StatusBarStyle = UIStatusBarStyle.BlackOpaque;
        }
    }
}

And that is the same solution provided in the duplicate question: https://stackoverflow.com/a/58028658/2913599