我为什么可以这样说:
NSString *test;
test = @"stack";
test = @"overflow";
如果没有问题,<代码>NSString就不应被改变?
页: 1 你没有改变这些声明背后的基本面貌,你重新创造/使用新的品牌。 点人本身可以像你所希望的那样经常改变,但这种变化并非万能。
扼杀物体不可变。 你们只是把要点改变为不同的方向。
在你的法典中,你只是“针对”旧价值,并创立了一个新的护法,用“流出”加以填补。
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