Despite the compiler warning, this code:
CGRect cr = [[self.layer presentationLayer] frame];
NSLog( @"%.1f %.1f", CGRectGetMidX( cr ), CGRectGetMidY( cr ) );
gives me just what I hoped for. I have the animation delegate start a
timer when the animation begins, and the timer calls the above code
every 0.1 seconds. I get a nice list of updated centre positions for
the subview as it moves through the superview.
So now I guess I should make the superview controller the delegate for
the animations in both the subviews, and have it test their changing
positions however-often is needed to get the desired result.
Thanks again for the advice; it seems to be exactly what I needed!
dkj
On 23-Nov-08, at 9:54 , DKJ wrote:
Now I'm getting a very odd result. In the code for a UIView I have
this:
CALayer *theLayer = self.layer;
id pLayer = [theLayer presentationLayer];
The first line is fine, but for the second I get a compiler warning:
no '-presentationLayer' method found
I'm looking at the CALayer docs, which has this:
- (id)presentationLayer
Return Value
A layer instance representing the current presentation layer.
Any idea what's going on? (I'm also puzzled why this method would
return an id.)
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