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Merge pull request ChenYilong#40 from HaloWang/master
文本订正
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01《招聘一个靠谱的iOS》面试题参考答案/《招聘一个靠谱的iOS》面试题参考答案(上).md

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@@ -1493,7 +1493,7 @@ objc在向一个对象发送消息时,runtime库会根据对象的isa指针找
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类的实例变量 |
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- 根对象就是NSobject,它的superclass指针指向nil
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- 根对象就是NSObject,它的superclass指针指向nil
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- 类对象既然称为对象,那它也是一个实例。类对象中也有一个isa指针指向它的元类(meta class),即类对象是元类的实例。元类内部存放的是类方法列表,根元类的isa指针指向自己,superclass指针指向NSObject类。
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