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当我尝试将 mixin 附加到颤振状态时,我想像我们在小部件继承中所做的那样覆盖状态的构建功能,但是,每次我尝试这样做时。它给了我一个错误。
有谁知道如何在 Mixins 中覆盖状态的构建功能?还是实际上不允许?如果不允许,那为什么?
非常感谢!