Use NavigatorKey #730
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Use NavigatorKey #730
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Abstract
navigatorKeyをglobalに持っておいて、そこからcontextを取り出すことによりrebuild後でそのWidgetのcontextが存在しない。みたいな問題を回避できることを知ったので使用する
ref: https://stackoverflow.com/questions/56280736/alertdialog-without-context-in-flutter
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