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並前往https://flutteragency.com/how-to-display-snackbar-in-flutter/

How to Display SnackBar In Flutter

Create a Custom function like below: void showInSnackBar(String value) { _scaffoldKey.currentState.showSnackBar(new SnackBar(content: new Text(value))); }.

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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
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  7. Flutter Form
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  8. Flutter Navigator
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