1 files changed, 41 insertions, 0 deletions
diff --git a/Xamarin.Forms.Platform.MacOS/Controls/NavigationChildPageWrapper.cs b/Xamarin.Forms.Platform.MacOS/Controls/NavigationChildPageWrapper.cs
new file mode 100644
index 00000000..a0e6dd41
--- /dev/null
+++ b/Xamarin.Forms.Platform.MacOS/Controls/NavigationChildPageWrapper.cs
@@ -0,0 +1,41 @@
+using System;
+using Foundation;
+
+namespace Xamarin.Forms.Platform.MacOS
+{
+	internal class NavigationChildPageWrapper : NSObject
+	{
+		bool _disposed;
+
+		public NavigationChildPageWrapper(Page page)
+		{
+			Page = page;
+			Page.PropertyChanged += PagePropertyChanged;
+			Identifier = Guid.NewGuid().ToString();
+		}
+
+		protected override void Dispose(bool disposing)
+		{
+			if (disposing && !_disposed)
+			{
+				_disposed = true;
+				if (Page != null)
+					Page.PropertyChanged -= PagePropertyChanged;
+				Page = null;
+			}
+			base.Dispose(disposing);
+		}
+
+		void PagePropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
+		{
+			if (e.PropertyName == NavigationPage.HasNavigationBarProperty.PropertyName
+				|| e.PropertyName == Page.TitleProperty.PropertyName
+				|| e.PropertyName == NavigationPage.HasBackButtonProperty.PropertyName)
+				Platform.NativeToolbarTracker.UpdateToolBar();
+		}
+
+		public string Identifier { get; set; }
+
+		public Page Page { get; private set; }
+	}
+}
+\ No newline at end of file