Sets the class object used to create the font manager to the given class.
- macOS 10.0+
The new font manager factory class, which should be a subclass of
NSFont class object receives a
shared message, it creates an instance of
a, if no instance already exists. Your font manager class should implement
init as its designated initializer. The default font manager factory is
This method must be invoked before your application’s main nib file is loaded, such as in the application delegate’s