Objective-C Runtime

1. Classes

   Covers NSObject, Protocol.

2. Protocols

   Covers NSObjectProtocol.

3. Reference

   Covers Objective-C Runtime, Objective-C Structures, Objective-C Constants, Objective-C Functions.

4. Functions

   Covers objc_copyImageHeaders(_:).

Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.

• Network System
• Network Extension System
• NetworkingDriverKit System
• Notary API Web
• Notification Center App Services
• Now Playing Media
• Observation App Frameworks
• Open Directory System
• OpenGL ES Graphics and Games
• os System
• OSLog System
• PackageDescription Developer Tools