Merge branch '4.5.0' into 4.6.0

Xamarin.Forms.ControlGallery.iOS/Xamarin.Forms.ControlGallery.iOS.csproj

@@ -138,6 +138,7 @@
     <Compile Include="CustomRenderers\RoundedLabelRenderer.cs" />
     <Compile Include="ApiLabelRenderer.cs" />
     <Compile Include="CustomRenderers\CustomSearchBarRenderer.cs" />
+    <Compile Include="_9767CustomRenderer.cs" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Xamarin.Forms.Controls\Xamarin.Forms.Controls.csproj">

Xamarin.Forms.ControlGallery.iOS/_9767CustomRenderer.cs

@@ -0,0 +1,50 @@
+using CoreAnimation;
+using CoreGraphics;
+using UIKit;
+using Xamarin.Forms;
+using Xamarin.Forms.ControlGallery.iOS;
+using Xamarin.Forms.Controls.Issues;
+using Xamarin.Forms.Platform.iOS;
+
+[assembly: ExportRenderer(typeof(Issue9767NavigationPage), typeof(_9767CustomRenderer))]
+namespace Xamarin.Forms.ControlGallery.iOS
+{
+	public class _9767CustomRenderer : NavigationRenderer
+    {
+        public _9767CustomRenderer() : base()
+        {
+       
+        }
+
+        public override void ViewWillAppear(bool animated)
+        {
+            base.ViewWillAppear(animated);
+
+            UpdateColors();
+            UpdateGradientView();
+        }
+		
+		void UpdateColors()
+		{
+            UINavigationBar.Appearance.BarTintColor = UIColor.FromPatternImage(UIImage.FromFile("coffee.png"));
+            UINavigationBar.Appearance.TintColor = UIColor.Yellow;
+            UINavigationBar.Appearance.SetTitleTextAttributes(new UITextAttributes { TextColor = UIColor.Blue });
+		}
+
+        void UpdateGradientView()
+        {
+			var gradientLayer = new CAGradientLayer
+			{
+				Bounds = NavigationBar.Bounds,
+				Colors = new CGColor[] { Color.Blue.ToCGColor(), Color.Purple.ToCGColor() },
+				EndPoint = new CGPoint(0.0, 0.5),
+				StartPoint = new CGPoint(1.0, 0.5)
+			};
+			UIGraphics.BeginImageContext(gradientLayer.Bounds.Size);
+            gradientLayer.RenderInContext(UIGraphics.GetCurrentContext());
+            UIImage image = UIGraphics.GetImageFromCurrentImageContext();
+            UIGraphics.EndImageContext();
+            NavigationBar.SetBackgroundImage(image, UIBarMetrics.Default);
+        }
+    }
+}

Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue9767.cs

@@ -68,10 +68,21 @@ namespace Xamarin.Forms.Controls.Issues
 				BarTextColor = Color.Default;
 			};
 
+			var navigateButton = new Button
+			{
+				Text = "Navigate"
+			};
+
+			navigateButton.Clicked += (sender, args) =>
+			{
+				Navigation.PushAsync(new Issue9767NavigationPage(new Issue9767()));
+			};
+
 			layout.Children.Add(updateBarBackgroundButton);
 			layout.Children.Add(updateBarTextButton);
 			layout.Children.Add(resetBarBackgroundButton);
 			layout.Children.Add(resetBarTextButton);
+			layout.Children.Add(navigateButton);
 
 			page.Content = layout;
 
@@ -80,7 +91,7 @@ namespace Xamarin.Forms.Controls.Issues
 
 		protected override void Init()
 		{
-		
+
 		}
 
 		Color GetRandomColor()
@@ -102,4 +113,18 @@ namespace Xamarin.Forms.Controls.Issues
 			return (Color)result;
 		}
 	}
-}
+
+	[Preserve(AllMembers = true)]
+	public class Issue9767NavigationPage : NavigationPage
+	{
+		public Issue9767NavigationPage()
+		{
+
+		}
+
+		public Issue9767NavigationPage(Page root) : base(root)
+		{
+
+		}
+	} 
+}

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

@@ -148,6 +148,14 @@ namespace Xamarin.Forms.Platform.iOS
 			base.ViewWillAppear(animated);
 
 			SetStatusBarStyle();
+
+			if (Forms.IsiOS13OrNewer)
+			{
+				UpdateTint();
+				UpdateBarBackgroundColor();
+				UpdateBarTextColor();
+				UpdateHideNavigationBarSeparator();
+			}
 		}
 
 		public override void ViewDidDisappear(bool animated)
@@ -226,11 +234,16 @@ namespace Xamarin.Forms.Platform.iOS
 			navPage.RemovePageRequested += OnRemovedPageRequested;
 			navPage.InsertPageBeforeRequested += OnInsertPageBeforeRequested;
 
-			UpdateTint();
-			UpdateBarBackgroundColor();
-			UpdateBarTextColor();
+			if (!Forms.IsiOS13OrNewer)
+			{
+				UpdateTint();
+				UpdateBarBackgroundColor();
+				UpdateBarTextColor();
+				UpdateHideNavigationBarSeparator();
+			}
+
 			UpdateUseLargeTitles();
-			UpdateHideNavigationBarSeparator();
+
 			if (Forms.RespondsToSetNeedsUpdateOfHomeIndicatorAutoHidden)
 				SetNeedsUpdateOfHomeIndicatorAutoHidden();
 
@@ -678,6 +691,9 @@ namespace Xamarin.Forms.Platform.iOS
 				NavigationBar.CompactAppearance = navigationBarAppearance;
 				NavigationBar.StandardAppearance = navigationBarAppearance;
 				NavigationBar.ScrollEdgeAppearance = navigationBarAppearance;
+
+				var parentingViewController = (ParentingViewController)ViewControllers.Last();
+				parentingViewController?.UpdateNavigationBarBackgroundImage();
 			}
 			else
 #endif
@@ -1081,6 +1097,7 @@ namespace Xamarin.Forms.Platform.iOS
 
 			public override void ViewWillAppear(bool animated)
 			{
+				UpdateNavigationBarBackgroundImage();
 				UpdateNavigationBarVisibility(animated);
 
 				NavigationRenderer n;
@@ -1155,6 +1172,22 @@ namespace Xamarin.Forms.Platform.iOS
 					UpdateIconColor();
 			}
 
+			internal void UpdateNavigationBarBackgroundImage()
+			{
+				if (!Forms.IsiOS13OrNewer)
+					return;
+
+				if (!_navigation.TryGetTarget(out NavigationRenderer navigationRenderer))
+					return;
+
+#if __XCODE11__
+				var backgroundImage = navigationRenderer.NavigationBar.GetBackgroundImage(UIBarMetrics.Default);
+
+				navigationRenderer.NavigationBar.CompactAppearance.BackgroundImage = backgroundImage;
+				navigationRenderer.NavigationBar.StandardAppearance.BackgroundImage = backgroundImage;
+				navigationRenderer.NavigationBar.ScrollEdgeAppearance.BackgroundImage = backgroundImage;
+#endif
+			}
 
 			internal void UpdateLeftBarButtonItem(Page pageBeingRemoved = null)
 			{