diff options
Diffstat (limited to 'Xamarin.Forms.Platform.iOS/Extensions/UIViewExtensions.cs')
| -rw-r--r-- | Xamarin.Forms.Platform.iOS/Extensions/UIViewExtensions.cs | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/Xamarin.Forms.Platform.iOS/Extensions/UIViewExtensions.cs b/Xamarin.Forms.Platform.iOS/Extensions/UIViewExtensions.cs index eab88e81..4c3eed98 100644 --- a/Xamarin.Forms.Platform.iOS/Extensions/UIViewExtensions.cs +++ b/Xamarin.Forms.Platform.iOS/Extensions/UIViewExtensions.cs @@ -37,9 +37,31 @@ namespace Xamarin.Forms.Platform.iOS } NativeViewPropertyListener nativePropertyListener = null; - if (bindingBase.Mode == BindingMode.TwoWay) { + if (bindingBase.Mode == BindingMode.TwoWay) + { nativePropertyListener = new NativeViewPropertyListener(propertyName); - view.AddObserver(nativePropertyListener, propertyName, 0, IntPtr.Zero); + try + { + //TODO: We need to figure a way to map the value back to the real objectiveC property. + //the X.IOS camelcase property name won't work + var key = new Foundation.NSString(propertyName.ToLower()); + var valueKey = view.ValueForKey(key); + if (valueKey != null) + { + view.AddObserver(nativePropertyListener, key, Foundation.NSKeyValueObservingOptions.New, IntPtr.Zero); + } + } + catch (Foundation.MonoTouchException ex) + { + nativePropertyListener = null; + if (ex.Name == "NSUnknownKeyException") + { + System.Diagnostics.Debug.WriteLine("KVO not supported, try specify a UpdateSourceEventName instead."); + return; + } + throw ex; + } + } NativeBindingHelpers.SetBinding(view, propertyName, bindingBase, nativePropertyListener); |