深拷贝，浅拷贝，原来如此

Posted 2022-10-23 ZHZMAREN

Cat *cat = [[Cat alloc]init];
        Persion *p = [[Persion alloc]init];
        NSLog(@"%p",cat);
        NSMutableString *string = [NSMutableString stringWithFormat:@"汉斯哈哈哈"];
        cat.c_name = string;
        cat.s_name = string;
        NSLog(@"%p",string);

        [string appendString:@"   hans "];
        NSLog(@"%p==%p==%@",cat,cat.c_name,cat.c_name);
        NSLog(@"%p==%p==%@",cat,cat.s_name,cat.s_name);
        p.c_cat = cat;
        NSLog(@"%p====%@====%@",p.c_cat,p.c_cat.c_name,p.c_cat.c_name);
        p.s_cat = cat;

        NSLog(@"%p====%@====%@",p.s_cat,p.s_cat.c_name,p.s_cat.s_name);

打印：

2017-06-28 16:09:16.090239 anvTest[707:130115] 0x1767b910
2017-06-28 16:09:16.091070 anvTest[707:130115] 0x1767bd00
2017-06-28 16:09:16.091517 anvTest[707:130115] 0x1767b910==0x1767bd60==汉斯哈哈哈
2017-06-28 16:09:16.091639 anvTest[707:130115] 0x1767b910==0x1767bd00==汉斯哈哈哈   hans
2017-06-28 16:09:16.091773 anvTest[707:130115] 0x1767ba20====(null)====(null)
2017-06-28 16:09:16.091858 anvTest[707:130115] 0x1767b910====汉斯哈哈哈====汉斯哈哈哈   hans