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並前往https://coderedirect.com/questions/197808/flutter-how-to-check-if-sliver-appbar-is-expanded-or-collapsed

Flutter How to check if Sliver AppBar is expanded or collapsed?

height = 80.0, it actually means sliver appbar is collapsed. Here is a full example: import 'package:flutter/material.dart'; void main() => runApp(MaterialApp( ...

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