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

From error , you need to use UIStatusBarManager in IOS 13.

If you have updated VS to the latest version(Visual Studio 2019 version 16.3.0/Visual Studio 2019 for Mac version 8.3 above), you can change color as follow:

UIView statusBar = new UIView(UIApplication.SharedApplication.KeyWindow.WindowScene.StatusBarManager.StatusBarFrame);
statusBar.BackgroundColor = UIColor.Yellow;
UIApplication.SharedApplication.KeyWindow.AddSubview(statusBar);

Else the follow methods can make it works .

UIView statusBar = new UIView(UIApplication.SharedApplication.StatusBarFrame);
statusBar.BackgroundColor = UIColor.Yellow;
UIApplication.SharedApplication.KeyWindow.AddSubview(statusBar);

If the view is not fully rendered , UIApplication.SharedApplication.KeyWindow will return null .So you can change status bar color after fully rendered . Here is the sample .

===================================Update=================================

If in Forms project , you can have a try with invoking method in AppDelegate.cs

public override void OnActivated(UIApplication uiApplication)
{
    if (UIDevice.CurrentDevice.CheckSystemVersion(13, 0))
    {
        // If VS has updated to the latest version , you can use StatusBarManager , else use the first line code
        // UIView statusBar = new UIView(UIApplication.SharedApplication.StatusBarFrame);
        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;
            UIApplication.SharedApplication.StatusBarStyle = UIStatusBarStyle.BlackOpaque;
        }
    }
    base.OnActivated(uiApplication);
} 

Note :

Not sure this solurion will always work in AppDelegate.cs, better invoked in Controller.cs's method , because from iOS 13 , Apple have modified the architure of AppDelegate and added SceneDelegate to project.