autoresizingMask
A bitmask defining how the layer is resized when the bounds of its superlayer changes.
Declaration
var autoresizingMask: CAAutoresizingMask { get set }Discussion
If your app does not use a layout manager or constraints to handle layout changes, you can assign a value to this property to adjust the layer’s size in response to changes in the superlayer’s bounds. For a list of possible values, see CAAutoresizingMask.
The default value of this property is kCALayerNotSizable.