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1.instance的isa指向类对象class
2.class的isa指向meta-class
3.meta-class的ISA指向基类(nsobject)的meta-class
4.类对象class的superclass指向父类的class,如果没有父类,superclass指针为nil
5.meate-class的superclass 指向父类的meta-class
6、基类(nsobject)的meta-class的superclass指向基类的class
1.instance的isa指向类对象class
2.class的isa指向meta-class
3.meta-class的ISA指向基类(nsobject)的meta-class
4.类对象class的superclass指向父类的class,如果没有父类,superclass指针为nil
5.meate-class的superclass 指向父类的meta-class
6、基类(nsobject)的meta-class的superclass指向基类的class
本文标题:ISA和super class 指向
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