[iOS] OnAppearing and OnNavigatedTo don't work when using the 'More' tab - fix

src/Controls/src/Core/Compatibility/Handlers/Shell/iOS/ShellSectionRenderer.cs

@@ -601,6 +601,19 @@ public override void PushViewController(UIViewController viewController, bool an
 			if (IsInMoreTab && ParentViewController is UITabBarController tabBarController)
 			{
 				tabBarController.MoreNavigationController.PushViewController(viewController, animated);
+
+				var tasks = _completionTasks;
+				var popTask = _popCompletionTask;
+
+				if (tasks.TryGetValue(viewController, out var source))
+				{
+					source.TrySetResult(true);
+					tasks.Remove(viewController);
+				}
+				else if (popTask != null)
+				{
+					popTask.TrySetResult(true);
+				}
 			}
 			else
 			{

src/Controls/tests/TestCases.HostApp/Issues/Issue27799.cs

@@ -0,0 +1,74 @@
+namespace Maui.Controls.Sample.Issues
+{
+
+	[Issue(IssueTracker.Github, 27799, "[iOS] OnAppearing and OnNavigatedTo does not work when using extended Tabbar", PlatformAffected.iOS)]
+
+	public class Issue27799 : TestShell
+	{
+		private static int _onNavigatedToCount = 0;
+		private static int _onAppearingCount = 0;
+
+		protected override void Init()
+		{
+			Routing.RegisterRoute(nameof(Tab6Subpage), typeof(Tab6Subpage));
+			AddBottomTab("tab1");
+			AddBottomTab(new Tab2(), "tab2");
+			AddBottomTab("tab3");
+			AddBottomTab("tab4");
+			AddBottomTab("tab5");
+			AddBottomTab(new Tab6(), "Tab6");
+		}
+
+		class Tab2 : ContentPage
+		{
+			Label _onNavigatedToCountLabel;
+			Label _onAppearingCountLabel;
+			public Tab2()
+			{
+				_onNavigatedToCountLabel = new Label { AutomationId = "OnNavigatedToCountLabel", Text = $"OnNavigatedTo: {_onNavigatedToCount}" };
+				_onAppearingCountLabel = new Label { AutomationId = "OnAppearingCountLabel", Text = $"OnAppearing: {_onAppearingCount}" };
+				Content = new StackLayout
+				{
+					Children =
+					{
+						_onNavigatedToCountLabel,
+						_onAppearingCountLabel
+					}
+				};
+			}
+
+			protected override void OnNavigatedTo(NavigatedToEventArgs e)
+			{
+				_onNavigatedToCount++;
+				_onNavigatedToCountLabel.Text = $"OnNavigatedTo: {_onNavigatedToCount}";
+			}
+
+			protected override void OnAppearing()
+			{
+				_onAppearingCount++;
+				_onAppearingCountLabel.Text = $"OnAppearing: {_onAppearingCount}";
+			}
+		}
+
+		class Tab6 : ContentPage
+		{
+			public Tab6()
+			{
+				Content = new Button
+				{
+					Text = "Go to subpage6",
+					AutomationId = "GoToSubpage6Button",
+					Command = new Command(async () => await Current.GoToAsync(nameof(Tab6Subpage)))
+				};
+			}
+			protected override void OnNavigatedTo(NavigatedToEventArgs e) => _onNavigatedToCount++;
+			protected override void OnAppearing() => _onAppearingCount++;
+		}
+
+		class Tab6Subpage : ContentPage
+		{
+			protected override void OnNavigatedTo(NavigatedToEventArgs e) => _onNavigatedToCount++;
+			protected override void OnAppearing() => _onAppearingCount++;
+		}
+	}
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue27799.cs

@@ -0,0 +1,38 @@
+#if IOS || ANDROID
+using NUnit.Framework;
+using NUnit.Framework.Legacy;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues
+{
+	public class Issue27799 : _IssuesUITest
+	{
+		public Issue27799(TestDevice testDevice) : base(testDevice)
+		{
+		}
+
+		public override string Issue => "[iOS] OnAppearing and OnNavigatedTo does not work when using extended Tabbar";
+
+		[Test]
+		[Category(UITestCategories.Shell)]
+		[Category(UITestCategories.Navigation)]
+		public void OnAppearingAndOnNavigatedToShouldBeCalles()
+		{
+			App.WaitForElement("More");
+			App.Click("More");
+			App.WaitForElement("Tab6");
+			App.Click("Tab6");
+			App.WaitForElement("GoToSubpage6Button");
+			App.Click("GoToSubpage6Button");
+			App.Click("tab2");
+			App.WaitForElement("OnNavigatedToCountLabel");
+			var onNavigatedToCountLabel = App.FindElement("OnNavigatedToCountLabel").GetText();
+			var onAppearingCountLabel = App.FindElement("OnAppearingCountLabel").GetText();
+
+			ClassicAssert.AreEqual("OnNavigatedTo: 3", onNavigatedToCountLabel);
+			ClassicAssert.AreEqual("OnAppearing: 3", onAppearingCountLabel);
+		}
+	}
+}
+#endif