backingType
The window’s backing store type.
Declaration
var backingType: NSWindow.BackingStoreType { get set }Discussion
The possible values for this property are described in NSWindow.BackingStoreType. You can set the property only to switch a buffered window to retained or vice versa; you can’t change the backing type to or from nonretained after initializing a NSWindow object (an error is generated if you attempt to do so).