Added test in controls gallery for issue xamarin#13258

Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue13258.xaml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<controls:TestContentPage
+	xmlns:controls="clr-namespace:Xamarin.Forms.Controls"
+	xmlns="http://xamarin.com/schemas/2014/forms"
+    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+    x:Class="Xamarin.Forms.Controls.Issues.Issue13258"
+    Title="Issue 13258">
+
+    <StackLayout>
+        <Button Text="PushModal" Clicked="PushModal_Clicked" />
+        <Button Text="PushModal with BackgroundColor" Clicked="PushModalWithBackground_Clicked" />
+    </StackLayout>
+
+</controls:TestContentPage>

Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue13258.xaml.cs

@@ -0,0 +1,85 @@
+using Xamarin.Forms.CustomAttributes;
+using Xamarin.Forms.Internals;
+
+namespace Xamarin.Forms.Controls.Issues
+{
+	[Preserve(AllMembers = true)]
+	[Issue(IssueTracker.Github, 13258, "[Bug] After PopModalAsync will not call OnAppearing (iOS)", PlatformAffected.iOS)]
+	public partial class Issue13258 : TestContentPage
+	{
+		public Issue13258()
+		{
+#if APP
+			InitializeComponent();
+#endif
+		}
+
+		protected override void Init()
+		{
+
+		}
+
+		void PushModal_Clicked(System.Object sender, System.EventArgs e)
+		{
+			Navigation.PushModalAsync(new Issue13258_ModalPage());
+		}
+
+		void PushModalWithBackground_Clicked(System.Object sender, System.EventArgs e)
+		{
+			Navigation.PushModalAsync(new Issue13258_ModalPage()
+			{
+				BackgroundColor = Color.Red,
+			});
+		}
+
+		protected override void OnAppearing()
+		{
+			System.Diagnostics.Debug.WriteLine("Issue13258 OnAppearing");
+			base.OnAppearing();
+		}
+
+		protected override void OnDisappearing()
+		{
+			System.Diagnostics.Debug.WriteLine("Issue13258 OnDisappearing");
+			base.OnDisappearing();
+		}
+
+		public class Issue13258_ModalPage : ContentPage
+		{
+			public Issue13258_ModalPage()
+			{
+				Title = "Issue13258 ModalPage";
+
+				var stackLayout = new StackLayout()
+				{
+					VerticalOptions = LayoutOptions.Center,
+				};
+
+				var button = new Button()
+				{
+					Text = "PopModal",
+					VerticalOptions = LayoutOptions.Center,
+				};
+				button.Clicked += (sender, e) => {
+					Navigation.PopModalAsync();
+				};
+
+				stackLayout.Children.Add(button);
+
+				Content = stackLayout;
+			}
+
+			protected override void OnAppearing()
+			{
+				System.Diagnostics.Debug.WriteLine("Issue13258_ModalPage OnAppearing");
+				base.OnAppearing();
+			}
+
+			protected override void OnDisappearing()
+			{
+				System.Diagnostics.Debug.WriteLine("Issue13258_ModalPage OnDisappearing");
+				base.OnDisappearing();
+			}
+		}
+	}
+}

Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Xamarin.Forms.Controls.Issues.Shared.projitems

@@ -59,6 +59,9 @@
     <Compile Include="$(MSBuildThisFileDirectory)Issue12344.xaml.cs">
       <DependentUpon>Issue12344.xaml</DependentUpon>
     </Compile>
+    <Compile Include="$(MSBuildThisFileDirectory)Issue13258.xaml.cs">
+      <DependentUpon>Issue13258.xaml</DependentUpon>
+    </Compile>
     <Compile Include="$(MSBuildThisFileDirectory)Issue12246.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue12429.xaml.cs">
       <DependentUpon>Issue12429.xaml</DependentUpon>
@@ -2604,6 +2607,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
     </EmbeddedResource>
+    <EmbeddedResource Include="$(MSBuildThisFileDirectory)Issue13258.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:UpdateDesignTimeXaml</Generator>
+    </EmbeddedResource>
   </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Include="$(MSBuildThisFileDirectory)Issue2447.xaml">