Fixes issue #7109 in XF 4.0 branch (#7151)

Xamarin.Forms.Platform.iOS/Forms.cs

@@ -34,6 +34,7 @@ namespace Xamarin.Forms
 		static bool? s_isiOS9OrNewer;
 		static bool? s_isiOS10OrNewer;
 		static bool? s_isiOS11OrNewer;
+		static bool? s_respondsTosetNeedsUpdateOfHomeIndicatorAutoHidden;
 #endif
 
 #if __MOBILE__
@@ -67,6 +68,16 @@ namespace Xamarin.Forms
 				return s_isiOS11OrNewer.Value;
 			}
 		}
+
+		internal static bool RespondsToSetNeedsUpdateOfHomeIndicatorAutoHidden
+		{
+			get
+			{
+				if (!s_respondsTosetNeedsUpdateOfHomeIndicatorAutoHidden.HasValue)
+					s_respondsTosetNeedsUpdateOfHomeIndicatorAutoHidden = new UIViewController().RespondsToSelector(new ObjCRuntime.Selector("setNeedsUpdateOfHomeIndicatorAutoHidden"));
+				return s_respondsTosetNeedsUpdateOfHomeIndicatorAutoHidden.Value;
+			}
+		}
 #endif
 
 		static IReadOnlyList<string> s_flags;

Xamarin.Forms.Platform.iOS/PlatformRenderer.cs

@@ -104,7 +104,7 @@ namespace Xamarin.Forms.Platform.iOS
 		{
 			base.ViewDidLoad();
 			SetNeedsStatusBarAppearanceUpdate();
-			if (Forms.IsiOS11OrNewer)
+			if (Forms.RespondsToSetNeedsUpdateOfHomeIndicatorAutoHidden)
 				SetNeedsUpdateOfHomeIndicatorAutoHidden();
 		}
 
@@ -199,7 +199,7 @@ namespace Xamarin.Forms.Platform.iOS
 		{
 			base.ViewDidLoad();
 			SetNeedsStatusBarAppearanceUpdate();
-			if (Forms.IsiOS11OrNewer)
+			if (Forms.RespondsToSetNeedsUpdateOfHomeIndicatorAutoHidden)
 				SetNeedsUpdateOfHomeIndicatorAutoHidden();
 		}
 	}

Xamarin.Forms.Platform.iOS/Renderers/NavigationRenderer.cs

@@ -231,7 +231,7 @@ namespace Xamarin.Forms.Platform.iOS
 			UpdateBarTextColor();
 			UpdateUseLargeTitles();
 			UpdateHideNavigationBarSeparator();
-			if (Forms.IsiOS11OrNewer)
+			if (Forms.RespondsToSetNeedsUpdateOfHomeIndicatorAutoHidden)
 				SetNeedsUpdateOfHomeIndicatorAutoHidden();
 
 			// If there is already stuff on the stack we need to push it

Xamarin.Forms.Platform.iOS/Renderers/PageRenderer.cs

@@ -176,7 +176,7 @@ namespace Xamarin.Forms.Platform.iOS
 
 			_appeared = true;
 			UpdateStatusBarPrefersHidden();
-			if(Forms.IsiOS11OrNewer)
+			if(Forms.RespondsToSetNeedsUpdateOfHomeIndicatorAutoHidden)
 				SetNeedsUpdateOfHomeIndicatorAutoHidden();
 
 			if (Element.Parent is CarouselPage)
@@ -439,7 +439,7 @@ namespace Xamarin.Forms.Platform.iOS
 
 		void UpdateHomeIndicatorAutoHidden()
 		{
-			if (Element == null || !Forms.IsiOS11OrNewer)
+			if (Element == null || !Forms.RespondsToSetNeedsUpdateOfHomeIndicatorAutoHidden)
 				return;
 
 			SetNeedsUpdateOfHomeIndicatorAutoHidden();

Xamarin.Forms.Platform.iOS/Renderers/PhoneMasterDetailRenderer.cs

@@ -339,7 +339,7 @@ namespace Xamarin.Forms.Platform.iOS
 			_detailController.AddChildViewController(detailRenderer.ViewController);
 
 			SetNeedsStatusBarAppearanceUpdate();
-			if (Forms.IsiOS11OrNewer)
+			if (Forms.RespondsToSetNeedsUpdateOfHomeIndicatorAutoHidden)
 				SetNeedsUpdateOfHomeIndicatorAutoHidden();
 		}