UITabBarController BarTintColor not working in iOS15

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In iOS15, I came across an issue that the bottom bar’s color not showing a correct color and it changed into transparent/white. The same code works good in iOS14 & iOS13.

I have a tab bar renderer class for iOS, in ViewWillAppear(), I use code TabBar.BarTintColor = UIColor.Blue to change tab bar color, it works only for iOS below than iOS15 but not in iOS15.

Based on this issue, I assuming I need to convert the code from UINavigationBar to UITabBar. However, I don’t see any reference to "scrollEdgeAppearance" in UITabBar class. I believe this is important to fix the issue. I’d be grateful if someone can give me some advice. Many Thanks.

Code to change Tab bar color that works in iOS14 & iOS13

TabBar.BarTintColor = UIColor.Blue;

UINavigationBar

    let appearance = UINavigationBarAppearance()
    appearance.configureWithOpaqueBackground()
    appearance.backgroundColor = <your tint color>
    navigationBar.standardAppearance = appearance;
    navigationBar.scrollEdgeAppearance = navigationBar.standardAppearance

my own UITabBar code

     var appearance = new UITabBarAppearance();
     appearance.ConfigureWithOpaqueBackground();
     appearance.BackgroundColor = UIColor.Blue;
     this.TabBarController.TabBar.StandardAppearance = appearance;

Source: Xamarin.ios Questions

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