Touch Gesture on a CALayer

Question

I am doing some drawing on a CALayer and want to be able to have the user single tap different parts of the drawing and trigger a response. I tried looking into gesture recognizers, and it seems that they need to be tied to a UIView. Any idea how I can get my desired behavior using CALayers?

Answer 1

You need a responder to be able to respond to touches. From the view that is hosting this layer (at some point in your tree this needs to be true) you can use -[CALayer hitTest:] to try to find the deepest sublayer that will respond to you.