从屏幕底部弹出一个小弹出窗口使用啥 Widget Flutter

Posted 2023-03-12

【中文标题】从屏幕底部弹出一个小弹出窗口使用啥 Widget Flutter

【英文标题】：What Widget to use for a small Pop Up from the bottom of the screen Flutter从屏幕底部弹出一个小弹出窗口使用什么 Widget Flutter

【发布时间】：2021-06-03 02:43:42

【问题描述】：

我正在尝试在按下某些东西时从屏幕底部弹出一个小的弹出屏幕，虽然没有被定向到另一个 dart 文件，但之前的屏幕可以变暗并被看到。我已尝试搜索该小部件，但找不到我正在寻找的那个。

图片举例说明我的意思。

【参考方案1】：

为此使用模态底页。请关注this link或查看here的文档

例如

import 'package:flutter/material.dart';

void main() => runApp(const MyApp());

/// This is the main application widget.
class MyApp extends StatelessWidget 
  const MyApp(Key? key) : super(key: key);

  static const String _title = 'Flutter Code Sample';

  @override
  Widget build(BuildContext context) 
    return MaterialApp(
      title: _title,
      home: Scaffold(
        appBar: AppBar(title: const Text(_title)),
        body: const MyStatelessWidget(),
      ),
    );
  


/// This is the stateless widget that the main application instantiates.
class MyStatelessWidget extends StatelessWidget 
  const MyStatelessWidget(Key? key) : super(key: key);

  @override
  Widget build(BuildContext context) 
    return Center(
      child: ElevatedButton(
        child: const Text('showModalBottomSheet'),
        onPressed: () 
          showModalBottomSheet<void>(
            context: context,
            builder: (BuildContext context) 
              return Container(
                height: 200,
                color: Colors.amber,
                child: Center(
                  child: Column(
                    mainAxisAlignment: MainAxisAlignment.center,
                    mainAxisSize: MainAxisSize.min,
                    children: <Widget>[
                      const Text('Modal BottomSheet'),
                      ElevatedButton(
                        child: const Text('Close BottomSheet'),
                        onPressed: () => Navigator.pop(context),
                      )
                    ],
                  ),
                ),
              );
            ,
          );
        ,
      ),
    );