The delegate of the file manager object.
- iOS 2.0+
- macOS 10.5+
- tvOS 9.0+
- watchOS 2.0+
It is recommended that you assign a delegate to the file manager object only if you allocated and initialized the object yourself. Avoid assigning a delegate to the shared file manager obtained from the
The default value of this property is
nil. When assigning a delegate to this property, your object must conform to the