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objective-c - 前值class声明是什么?有什么好处?
迷茫
2017-05-02 09:25:43
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老师今天上课讲解c,不小心提到了前值class声明, 没有听懂?谁能帮忙解释解释?
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迷茫
业精于勤，荒于嬉;行成于思，毁于随。
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