Framework

Objective-C Runtime

Gain low-level access to the Objective-C runtime and the Objective-C root types.

Overview

The Objective-C Runtime module APIs define the base of the Objective-C language. These APIs include:

  • Types such as the NSObject class and the NSObjectProtocol protocol that provide the root functionality of most Objective-C classes

  • Functions and data structures that comprise the Objective-C runtime, which provides support for the dynamic properties of the Objective-C language

You typically don't need to use this module directly.

Topics

Classes

class NSObject

The root class of most Objective-C class hierarchies, from which subclasses inherit a basic interface to the runtime system and the ability to behave as Objective-C objects.

Protocols

protocol NSObjectProtocol

The group of methods that are fundamental to all Objective-C objects.

Enumerations

enum objc_AssociationPolicy

Type to specify the behavior of an association.

Beta Software

This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.

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