Fix issue with ListView wrong top padding in iOS 15 (#14671)

Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue14664.cs

@@ -0,0 +1,50 @@
+using Xamarin.Forms.CustomAttributes;
+using Xamarin.Forms.Internals;
+
+#if UITEST
+using Xamarin.UITest;
+using NUnit.Framework;
+using Xamarin.Forms.Core.UITests;
+#endif
+
+namespace Xamarin.Forms.Controls.Issues
+{
+	[Preserve(AllMembers = true)]
+	[Issue(IssueTracker.Github, 14664, "[Bug] ImageButton.Aspect Property is always Fill",
+		PlatformAffected.iOS)]
+#if UITEST
+	[NUnit.Framework.Category(UITestCategories.ListView)]
+	[NUnit.Framework.Category(UITestCategories.ManualReview)]
+#endif
+	public class Issue14664 : TestContentPage
+	{
+		protected override void Init()
+		{
+			var layout = new Grid
+			{
+				BackgroundColor = Color.Red
+			};
+
+			var listView = new ListView
+			{
+				BackgroundColor = Color.Green,
+				ItemsSource = new string[]
+				{
+					"Item 1",
+					"Item 2",
+					"Item 3",
+					"Item 4",
+					"Item 5",
+					"Item 6",
+					"Item 7",
+					"Item 8",
+					"Item 9"
+				}
+			};
+
+			layout.Children.Add(listView);
+
+			Content = layout;
+		}
+	}
+}

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

@@ -1786,6 +1786,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Issue10101.xaml.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue13818.xaml.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)FrameBackgroundIssue.xaml.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Issue14664.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue14192.xaml.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue14505.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue14505-II.cs" />

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

@@ -271,6 +271,9 @@ protected override void OnElementChanged(ElementChangedEventArgs<ListView> e)
 					_tableViewController = new FormsUITableViewController(e.NewElement, _usingLargeTitles);
 					SetNativeControl(_tableViewController.TableView);
 
+					if (Forms.IsiOS15OrNewer)
+						_tableViewController.TableView.SectionHeaderTopPadding = new nfloat(0);
+
 					_backgroundUIView = _tableViewController.TableView.BackgroundView;
 
 					_insetTracker = new KeyboardInsetTracker(_tableViewController.TableView, () => Control.Window, insets => Control.ContentInset = Control.ScrollIndicatorInsets = insets, point =>