title: UITabBarController BarTintColor not working in iOS15
body: <p>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 &amp; iOS13.</p>
  <p>I have a tab bar renderer class for iOS, in ViewWillAppear(), I use code <code>TabBar.BarTintColor = UIColor.Blue</code> to change tab bar color, it works only for iOS below than iOS15 but not in iOS15.</p>
  <p>Based on this <a href="https://developer.apple.com/forums/thread/682420" rel="nofollow noreferrer">issue</a>, I assuming I need to convert the code from UINavigationBar to UITabBar. However, I don't see any reference to &quot;scrollEdgeAppearance&quot; 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.</p>
  <p><strong>Code to change Tab bar color that works in iOS14 &amp; iOS13</strong></p>
  <pre><code>TabBar.BarTintColor = UIColor.Blue;
  </code></pre>
  <p><strong>UINavigationBar</strong></p>
  <pre><code>    let appearance = UINavigationBarAppearance()
      appearance.configureWithOpaqueBackground()
      appearance.backgroundColor = &lt;your tint color&gt;
      navigationBar.standardAppearance = appearance;
      navigationBar.scrollEdgeAppearance = navigationBar.standardAppearance
  </code></pre>
  <p><strong>my own UITabBar code</strong></p>
  <pre><code>     var appearance = new UITabBarAppearance();
       appearance.ConfigureWithOpaqueBackground();
       appearance.BackgroundColor = UIColor.Blue;
       this.TabBarController.TabBar.StandardAppearance = appearance;
  </code></pre>