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並前往https://googleflutter.com/flutter-snackbar-example/

Flutter SnackBar Tutorial

So that, when we want to display a SnackBar, we can access the Scaffold current state using the _scaffoldKey. main.dart import 'package:flutter/material.dart'; ...

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查詢 「Flutter currentState」的人也找了：

  1. Flutter GlobalKey
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  2. Flutter GlobalKey currentState null
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  3. Flutter GlobalKey context
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  4. Flutter State class
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  5. Flutter key
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  6. Flutter get current state from widget
    7.
  7. Flutter Form
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  8. Flutter Navigator
    9.