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Objective-C Runtime Hacking

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Avatar for Błażej Biesiada Błażej Biesiada
July 04, 2013
Programming
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Objective-C Runtime Hacking

A short introduction into Objective-C runtime programming.

Avatar for Błażej Biesiada

Błażej Biesiada

July 04, 2013
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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
  17. None

  18. • Objective-C Runtime Programming Guide • Objective-C Runtime Reference •

    Friday Q&A by Mike Ash

  19. Thanks!