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 NSObject 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

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.

Protocol

Protocols

NSObject

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

Reference

Objective-C Runtime

Describes the macOS Objective-C runtime library support functions and data structures.

Objective-C Structures
Objective-C Constants
Objective-C Functions
Objective-C Data Types