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flutter如何拆分不同文件WIDGET，然后各WIDGET可以相互调用？

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flutter如何拆分不同文件WIDGET，然后各WIDGET可以相互调用？

比如，我一个文件是main.dart，代码太多了，我想把一些共用的代码另组成一个新文件widget，然后在main.dart中去调用各widget文件，我会在main.dart 中import各widget文件可以实现，但在各widget文件中怎样能调用main.dart中的变量或请求数据呢？


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provider bloc等等 状态管理
https://book.flutterchina.clu...


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