How to Key-Value-Observe the rotation of a CALayer?
- by HelloMoon
I can access the value like this:
NSNumber* rotationZ = [myLayer valueForKeyPath:@"transform.rotation.z"];
But for some reason, if I try to KV-observe that key path, I get a compiler error. First, this is how I try to do it:
[myLayer addObserver:self forKeyPath:@"transform.rotation.z" options:0 context:nil];
The compiler tells me:
***…
