一.实例：

- (void)printClassRelationshipWithObject:(id)objc{
    NSLog(@"*********************************************");

    NSLog(@"\n实例对象地址 - %p %@",objc,objc);
    NSLog(@"\n类对象地址 - %p %@",[objc class],[objc class]);
    NSLog(@"\n父类对象地址 - %p %@",[objc superclass],[objc superclass]);
     NSLog(@"\n元类对象地址 - %p %@",object_getClass(object_getClass(objc)),object_getClass(object_getClass(objc)));
    NSLog(@"\n元类的父类对象地址 - %p %@",[object_getClass(objc) superclass],[object_getClass(objc) superclass]);
    NSLog(@"\n根元类对象地址 - %p %@",object_getClass(object_getClass(objc)),object_getClass(object_getClass(objc)));
    NSLog(@"\n根元类的父类对象地址 - %p %@",[object_getClass(object_getClass(objc)) superclass],[object_getClass(object_getClass(objc)) superclass]);
    NSLog(@"\n根根元类对象地址 - %p %@",object_getClass(object_getClass(object_getClass(objc))),object_getClass(object_getClass(object_getClass(objc))));
    NSLog(@"\n根根元类的父类对象地址 - %p %@",[object_getClass(object_getClass(object_getClass(objc))) superclass],[object_getClass(object_getClass(object_getClass(objc))) superclass]);
    NSLog(@"*********************************************");

}

7A74DD67B72E20DC4B6DAA4E1784C18D.jpg

二、由实例的结果,我们总结出实例对象-类对象-元类之间的关系:

3554D633-B2DB-47BB-8AE5-BC418D451FD8.png