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並前往https://droidyue.com/blog/2022/03/06/flutter-tabcontroller-listener-called-multiple-times/

Flutter TabController 多次调用，导致切换异常问题 - 技术小黑屋

Flutter 中，TabController 是连接TabBar 与TabBarView 的纽带，处理选中状态时必 ... initState(); _tabController = TabController(vsync: this, ...

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