Update ItemsViewLayout.cs (#6583)

Unsubscribe from PropertyChanged during Dispose() on ItemsViewLayout (iOS).

diff --git a/Xamarin.Forms.Platform.iOS/CollectionView/ItemsViewLayout.cs b/Xamarin.Forms.Platform.iOS/CollectionView/ItemsViewLayout.cs
index 0d41d81..21f398a 100644 (file)
--- a/Xamarin.Forms.Platform.iOS/CollectionView/ItemsViewLayout.cs
+++ b/Xamarin.Forms.Platform.iOS/CollectionView/ItemsViewLayout.cs
@@ -51,7 +51,7 @@ namespace Xamarin.Forms.Platform.iOS
                        {
                                if (_itemsLayout != null)
                                {
-                                       _itemsLayout.PropertyChanged += LayoutOnPropertyChanged;
+                                       _itemsLayout.PropertyChanged -= LayoutOnPropertyChanged;
                                }
                        }