Objective-C Runtime Hacking

A short introduction into Objective-C runtime programming.

Transcript

1. [[ObjC runtime] hacking] Błażej Biesiada @_bejo bejo
2. What is Runtime? ObjC Application Assembler C
3. What is Runtime? ObjC Application Assembler C Runtime
4. APIs
5. APIs • NSObject methods • -class • -isKindOfClass: • etc. ...
6. APIs • NSObject methods • -class • -isKindOfClass: • etc. ... • Runtime functions • objc_lookUpClass • class_getName • etc. ...
7. Demo http://github.com/bejo/BBBRuntimeNavigator
8. Your own root objects NS_ROOT_CLASS @interface KRKObject { Class!isa; } @end
9. So... how does KVO work?
10. So... how does KVO work? • objc_registerClassPair
11. So... how does KVO work? • objc_registerClassPair • class_setSuperclass
12. So... how does KVO work? • objc_registerClassPair • class_setSuperclass • class_addMethod
13. Associative References
14. Associative References • objc_setAssociatedObject
15. Associative References • objc_setAssociatedObject • objc_getAssociatedObject
16. Associative References • objc_setAssociatedObject • objc_getAssociatedObject • Google: associative references category
18. • Objective-C Runtime Programming Guide • Objective-C Runtime Reference • Friday Q&A by Mike Ash
19. Thanks!