Flutter进阶—质感设计之模态底部面板

模态底部面板是菜单或对话框的替代方案，可防止用户与其他控件进行互动，可以使用showModalBottomSheet函数创建和显示模态底部面板。

import 'package:flutter/material.dart';

class MyApp extends StatelessWidget {

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text('底部面板')
      ),
      body: new Center(
        child: new RaisedButton(
          child: new Text('显示底部面板'),
          onPressed: () {
            // showModalBottomSheet<T>：显示模态质感设计底部面板
            showModalBottomSheet<Null>(context:context, builder:(BuildContext context) {
              return new Container(
                child: new Padding(
                  padding: const EdgeInsets.all(32.0),
                  child: new Text(
                    '这是模态底部面板，点击任意位置即可关闭',
                    textAlign: TextAlign.center,
                    style: new TextStyle(
                      color: Theme.of(context).accentColor,
                      fontSize: 24.0
                    )
                  )
                )
              );
            });
          }
        )
      )
    );
  }
}

void main() {
  runApp(new MaterialApp(
    title: 'Flutter Demo',
    home: new MyApp()
  ));
}