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georgetso
V2EX  ›  iDev

研究 associationObject 的时候发现一个奇怪的现象，求解释

  •   
  •   georgetso · Sep 19, 2015 · 1870 views
    This topic created in 4025 days ago, the information mentioned may be changed or developed.
    代码地址 http://pan.baidu.com/s/1o6BvfsQ

    奇怪的地方是对象的地址不同
    2015-09-19 13:31:15.306 test[80165:2126493] -[TestObj init] TestObj 0x7fff59b4fa98
    2015-09-19 13:31:15.309 test[80165:2126493] -[TestObj dealloc] TestObj 0x7fff59b500f8

    求高人解释
  • testobj
  • 13:31:15
  • 2015-09-19
  • test
    2 replies  •  2015-09-19 14:06:05 +08:00
    ibcker
        1
    ibcker  
       Sep 19, 2015   ❤️ 1
    NSLog (@"%s %@ %p", __PRETTY_FUNCTION__, self.class, &self );
    改为
    NSLog (@"%s %@ %p", __PRETTY_FUNCTION__, self.class, self );
    ibcker
        2
    ibcker  
       Sep 19, 2015
    给你写个例子，再不明白就没办法了···google 关键词：指针的指针··

    TestObj *obj = [TestObj new];

    NSLog (@"obj->%p",obj );
    NSLog (@"&obj->%p",&obj );

    TestObj *obj2 = obj;
    NSLog (@"obj2->%p",obj2 );
    NSLog (@"&obj2->%p",&obj2 );
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