Tutorial by Topics: objective

VersionRelease Date1.01983-01-012.02007-10-27Modern2014-03-10

For further information, see Apple's documentation on Using Swift with Cocoa and Objective-C.

First introduced in iOS 3.1 as part of the Objective-C runtime, associated objects provide a way to add instance variables to an existing class object (w\o subclassing. This means you'll be able to attach any object to any other object without subclassing. void objc_setAssociatedObject(id o...