Flutter ConfirmDialog 對話視窗

 

enum ConfirmAction { ACCEPT, CANCEL }

Future<ConfirmAction?> confirmDialog(BuildContext context) async {
  /*
  Sample:
        onPressed: () async {
          final ConfirmAction? action = await confirmDialog(context);
          print("你選擇：$action");
        },
  */
  return showDialog<ConfirmAction>(
    context: context,
    barrierDismissible: false, //控制點擊對話框以外的區域是否隱藏對話框
    builder: (BuildContext context) {
      return AlertDialog(
        title: Text('確認取消對話視窗'),
        content: const Text('內容訊息'),
        actions: <Widget>[
          FlatButton(
            child: const Text('確認'),
            onPressed: () {
              Navigator.of(context).pop(ConfirmAction.ACCEPT);
            },
          ),
          FlatButton(
            child: const Text('取消'),
            onPressed: () {
              Navigator.of(context).pop(ConfirmAction.CANCEL);
            },
          )
        ],
      );
    },
  );
}

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: () async {

          final ConfirmAction? action = await confirmDialog(context);
          print("你選擇：$action");

          Navigator.pop(context);
        },
      ),
    );
  }
}