[iOS] Implemented SelectedTintColor and UnselectedTintColor for iOS

Xamarin.Forms.Controls/GalleryPages/PlatformSpecificsGalleries/TabbedPageiOS.cs

@@ -43,6 +43,14 @@ ContentPage CreatePage(ICommand restore, string title)
 			{
 				Text = "Toggle PreferredStatusBarUpdateAnimation"
 			};
+			var setSelectedItemColorToRedButton = new Button
+			{
+				Text = "Set selected item color to red"
+			};
+			var setUnselectedItemColorToRedButton = new Button
+			{
+				Text = "Set unselected item color to yellow"
+			};
 
 			togglePrefersStatusBarHiddenButton.Command = new Command(() =>
 			{
@@ -77,12 +85,24 @@ ContentPage CreatePage(ICommand restore, string title)
 					page.On<iOS>().SetPreferredStatusBarUpdateAnimation(UIStatusBarAnimation.Fade);
 			});
 
+			setSelectedItemColorToRedButton.Command = new Command(() =>
+			{
+				On<iOS>().SetSelectedTintColor(Color.Red);
+			});
+
+			setUnselectedItemColorToRedButton.Command = new Command(() =>
+			{
+				On<iOS>().SetUnselectedTintColor(Color.Yellow);
+			});
+
 			var restoreButton = new Button { Text = "Back To Gallery" };
 			restoreButton.Clicked += (sender, args) => restore.Execute(null);
 			content.Children.Add(restoreButton);
 			content.Children.Add(togglePrefersStatusBarHiddenButton);
 			content.Children.Add(togglePrefersStatusBarHiddenForPageButton);
 			content.Children.Add(togglePreferredStatusBarUpdateAnimationButton);
+			content.Children.Add(setSelectedItemColorToRedButton);
+			content.Children.Add(setUnselectedItemColorToRedButton);
 			content.Children.Add(new Label
 			{
 				HorizontalOptions = LayoutOptions.Center,

Xamarin.Forms.Core/PlatformConfiguration/iOSSpecific/TabbedPage.cs

@@ -0,0 +1,57 @@
+namespace Xamarin.Forms.PlatformConfiguration.iOSSpecific
+{
+	using FormsElement = Forms.TabbedPage;
+
+	public static class TabbedPage
+	{
+		public static readonly BindableProperty UnselectedTintColorProperty =
+			BindableProperty.Create("UnselectedTintColor", typeof(Color),
+			typeof(TabbedPage), Color.Default);
+
+		public static Color GetUnselectedTintColor(BindableObject element)
+		{
+			return (Color)element.GetValue(UnselectedTintColorProperty);
+		}
+
+		public static void SetUnselectedTintColor(BindableObject element, Color value)
+		{
+			element.SetValue(UnselectedTintColorProperty, value);
+		}
+
+		public static IPlatformElementConfiguration<iOS, FormsElement> SetUnselectedTintColor(this IPlatformElementConfiguration<iOS, FormsElement> config, Color value)
+		{
+			SetUnselectedTintColor(config.Element, value);
+			return config;
+		}
+
+		public static Color GetUnselectedTintColor(this IPlatformElementConfiguration<iOS, FormsElement> config)
+		{
+			return GetUnselectedTintColor(config.Element);
+		}
+
+		public static readonly BindableProperty SelectedTintColorProperty =
+			BindableProperty.Create("SelectedTintColor", typeof(Color),
+			typeof(TabbedPage), Color.Default);
+
+		public static Color GetSelectedTintColor(BindableObject element)
+		{
+			return (Color)element.GetValue(SelectedTintColorProperty);
+		}
+
+		public static void SetSelectedTintColor(BindableObject element, Color value)
+		{
+			element.SetValue(SelectedTintColorProperty, value);
+		}
+
+		public static IPlatformElementConfiguration<iOS, FormsElement> SetSelectedTintColor(this IPlatformElementConfiguration<iOS, FormsElement> config, Color value)
+		{
+			SetSelectedTintColor(config.Element, value);
+			return config;
+		}
+
+		public static Color GetSelectedTintColor(this IPlatformElementConfiguration<iOS, FormsElement> config)
+		{
+			return GetSelectedTintColor(config.Element);
+		}
+	}
+}

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

@@ -5,6 +5,7 @@
 using System.Threading.Tasks;
 using UIKit;
 using Xamarin.Forms.Internals;
+using Xamarin.Forms.PlatformConfiguration.iOSSpecific;
 using static Xamarin.Forms.PlatformConfiguration.iOSSpecific.Page;
 using PageUIStatusBarAnimation = Xamarin.Forms.PlatformConfiguration.iOSSpecific.UIStatusBarAnimation;
 
@@ -52,6 +53,9 @@ public UIView NativeView
 			get { return View; }
 		}
 
+		public Color SelectedTintColor => (Element != null) ? Tabbed.OnThisPlatform().GetSelectedTintColor() : Color.Default;
+		public Color UnselectedTintColor => (Element != null) ? Tabbed.OnThisPlatform().GetUnselectedTintColor() : Color.Default;
+
 		public void SetElement(VisualElement element)
 		{
 			var oldElement = Element;
@@ -73,6 +77,7 @@ public void SetElement(VisualElement element)
 
 			UpdateBarBackgroundColor();
 			UpdateBarTextColor();
+			UpdateTintColor();
 
 			EffectUtilities.RegisterEffectControlProvider(this, oldElement, element);
 		}
@@ -210,6 +215,7 @@ void OnPagesChanged(object sender, NotifyCollectionChangedEventArgs e)
 
 			UpdateBarBackgroundColor();
 			UpdateBarTextColor();
+			UpdateTintColor();
 		}
 
 		void OnPropertyChanged(object sender, PropertyChangedEventArgs e)
@@ -234,6 +240,9 @@ void OnPropertyChanged(object sender, PropertyChangedEventArgs e)
 				UpdatePrefersStatusBarHiddenOnPages();
 			else if (e.PropertyName == PreferredStatusBarUpdateAnimationProperty.PropertyName)
 				UpdateCurrentPagePreferredStatusBarUpdateAnimation();
+			else if (e.PropertyName == PlatformConfiguration.iOSSpecific.TabbedPage.SelectedTintColorProperty.PropertyName ||
+				e.PropertyName == PlatformConfiguration.iOSSpecific.TabbedPage.UnselectedTintColorProperty.PropertyName)
+				UpdateTintColor();
 		}
 
 		public override UIViewController ChildViewControllerForStatusBarHidden()
@@ -363,6 +372,18 @@ void UpdateBarTextColor()
 			TabBar.TintColor = isDefaultColor ? _defaultBarTextColor : barTextColor.ToUIColor();
 		}
 
+		void UpdateTintColor()
+		{
+			if (Tabbed == null || TabBar == null || TabBar.Items == null)
+				return;
+
+			if (SelectedTintColor != Color.Default)
+				TabBar.SelectedImageTintColor = SelectedTintColor.ToUIColor();
+
+			if (Forms.IsiOS10OrNewer && UnselectedTintColor != Color.Default)
+				TabBar.UnselectedItemTintColor = UnselectedTintColor.ToUIColor();
+		}
+
 		void UpdateChildrenOrderIndex(UIViewController[] viewControllers)
 		{
 			for (var i = 0; i < viewControllers.Length; i++)