Hi - I'm having trouble getting Core Animation to animate a UIButton appearing 
on my parent view. My old code did this:

<create button>
[self.view addSubview:newButton];

The button appeared straight away and works fine. Now, I'm trying to animate 
the appearance of this button and I just can't seem to get it working. Whatever 
I try the button appears straight away, just like the line above. I've tried 
numerous snippets of sample code, none of them work. My current code looks like 
this:

<create button>
[UIView transitionWithView:self.view duration:1.0 
options:UIViewAnimationOptionTransitionCurlUp animations:^{ [self.view 
addSubview:newButton]; } completion:nil];

I'm obviously doing something wrong here, can anyone point me in the right 
direction ?

Thanks - I'm new to CA, so please bare with me 
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