public static void SetBinding(this UIView view, string propertyName, BindingBase bindingBase, string updateSourceEventName = null)
{
var binding = bindingBase as Binding;
//This will allow setting bindings from Xaml by reusing the MarkupExtension
updateSourceEventName = updateSourceEventName ?? binding?.UpdateSourceEventName;
if (!IsNullOrEmpty(updateSourceEventName))
{
NativeBindingHelpers.SetBinding(view, propertyName, bindingBase, updateSourceEventName);
return;
}
NativeViewPropertyListener nativePropertyListener = null;
if (bindingBase.Mode == BindingMode.TwoWay)
{
nativePropertyListener = new NativeViewPropertyListener(propertyName);
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);
}
public static void SetBinding(this UIView view, string propertyName, BindingBase bindingBase, string updateSourceEventName = null)
{
var binding = bindingBase as Binding;
//This will allow setting bindings from Xaml by reusing the MarkupExtension
updateSourceEventName = updateSourceEventName ?? binding?.UpdateSourceEventName;
if (!IsNullOrEmpty(updateSourceEventName))
{
NativeBindingHelpers.SetBinding(view, propertyName, bindingBase, updateSourceEventName);
return;
}
NativeViewPropertyListener nativePropertyListener = null;
if (bindingBase.Mode == BindingMode.TwoWay) {
nativePropertyListener = new NativeViewPropertyListener(propertyName);
view.AddObserver(nativePropertyListener, propertyName, 0, IntPtr.Zero);
}
NativeBindingHelpers.SetBinding(view, propertyName, bindingBase, nativePropertyListener);
}