CATransformLayer objects are used to create true 3D layer hierarchies, rather than the flattened hierarchy rendering model used by other
Available in iOS 3.0 and later.
Returns the farthest descendant of the receiver in the layer hierarchy (including itself) that contains a specified point.
A point in the coordinate system of the receiver's superlayer.
The layer that contains
nilif the point lies outside the receiver’s bounds rectangle.
Transform layers do not support hit-testing. As a result, you should not send
hitTest:messages to transform layers.