Flutter SnackBar 對話訊息

 

import 'package:flutter/material.dart';
import 'package:untitled/Constants.dart';

class detailpage extends StatelessWidget{
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: appBackgroundGreyColor,
      body: _detailpage(),
    );
  }
}

class _detailpage extends StatelessWidget{
  Widget build(BuildContext context) {
    return Center(
      child: RaisedButton(
        child: Text("Return"),
        onPressed: () {
          final snackBar = new SnackBar(content: new Text('顯示 SnackBar 訊息'));
          Scaffold.of(context).showSnackBar(snackBar);
        },
      ),
    );
  }
}