Block keyboard for iOS 15 time picker (#14690)

* Block keyboard for iOS 15 time picker

* Update TimePickerRenderer.cs

Xamarin.Forms.Platform.iOS/Forms.cs

@@ -40,6 +40,7 @@ public static class Forms
 		static bool? s_isiOS12OrNewer;
 		static bool? s_isiOS13OrNewer;
 		static bool? s_isiOS14OrNewer;
+		static bool? s_isiOS15OrNewer;
 		static bool? s_respondsTosetNeedsUpdateOfHomeIndicatorAutoHidden;
 
 		internal static bool IsiOS9OrNewer
@@ -103,6 +104,16 @@ internal static bool IsiOS14OrNewer
 			}
 		}
 
+		internal static bool IsiOS15OrNewer
+		{
+			get
+			{
+				if (!s_isiOS15OrNewer.HasValue)
+					s_isiOS15OrNewer = UIDevice.CurrentDevice.CheckSystemVersion(15, 0);
+				return s_isiOS15OrNewer.Value;
+			}
+		}
+
 
 		internal static bool RespondsToSetNeedsUpdateOfHomeIndicatorAutoHidden
 		{

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

@@ -56,6 +56,12 @@ protected override void Dispose(bool disposing)
 				{
 					_picker.RemoveFromSuperview();
 					_picker.ValueChanged -= OnValueChanged;
+
+					if (Forms.IsiOS15OrNewer)
+					{
+						_picker.EditingDidBegin -= PickerEditingDidBegin;
+					}
+
 					_picker.Dispose();
 					_picker = null;
 				}
@@ -91,6 +97,11 @@ protected override void OnElementChanged(ElementChangedEventArgs<TimePicker> e)
 						_picker.PreferredDatePickerStyle = UIKit.UIDatePickerStyle.Wheels;
 					}
 
+					if (Forms.IsiOS15OrNewer)
+					{
+						_picker.EditingDidBegin += PickerEditingDidBegin;
+					}
+
 					var width = UIScreen.MainScreen.Bounds.Width;
 					var toolbar = new UIToolbar(new RectangleF(0, 0, width, 44)) { BarStyle = UIBarStyle.Default, Translucent = true };
 					var spacer = new UIBarButtonItem(UIBarButtonSystemItem.FlexibleSpace);
@@ -162,6 +173,11 @@ void OnStarted(object sender, EventArgs eventArgs)
 			ElementController.SetValueFromRenderer(VisualElement.IsFocusedPropertyKey, true);
 		}
 
+		void PickerEditingDidBegin(object sender, EventArgs eventArgs)
+		{
+			_picker.ResignFirstResponder();
+		}
+
 		void OnValueChanged(object sender, EventArgs e)
 		{
 			if (Element.OnThisPlatform().UpdateMode() == UpdateMode.Immediately)