Problems animating UIView alpha

Question

I\'m trying to apply a fade to an UIView I created programmatically on the top of another.

[UIView animateWithDuration:0.5 animations:^(void) {
    [self.vie         


        

Answer 1

I had exactly the same problem, and none of the suggestions worked for me. I overcame the problem by using the layer opacity instead. This is the code for showing the layer (using Xamarin, but you'll get the idea):

        //Enter the view fading
        zoomView.Layer.Opacity = 0;

        UIApplication.SharedApplication.KeyWindow.RootViewController.View.Add(zoomView);

        UIView.AnimateNotify(
            0.15, // duration
            () => { zoomView.Layer.Opacity = 1.0f },
            (finished) => { }
        );

And this is for fading out the same zoomView

UIView.AnimateNotify(
                0.15, // duration
                () => { zoomView.Layer.Opacity = 0; },
                (finished) =>
                {
                    if (finished)
                    {
                        zoomView.RemoveFromSuperview();
                    }
                }
            );