var contents: Any?
An object that provides the contents of the layer. Animatable.
var contentsRect: CGRect
The rectangle, in the unit coordinate space, that defines the portion of the layer’s contents that should be used. Animatable.
var contentsCenter: CGRect
The rectangle that defines how the layer contents are scaled if the layer’s contents are resized. Animatable.
func display()
Reloads the content of this layer.
func draw(in: CGContext)
Draws the layer’s content using the specified graphics context.
