【自学Flutter】2.1 按钮的使用

2.1 按钮的使用

1.源代码

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget{
  @override
  Widget build(BuildContext context ){
    return MaterialApp(
      title:'Text widget usage',
      home:Scaffold(
          body:
          Center(
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                RaisedButton(
                  onPressed: () => {},
                  child: Text("我是RaiseButton按钮"),
                ),
                FlatButton(
                  onPressed: () => {},
                  child: Text("我是FlatButton按钮"),
                ),
                OutlineButton(
                  onPressed: () => {},
                  child: Text("我是OutlineButton按钮"),
                ),
                IconButton(
                  onPressed: () => {},
                  icon: Icon(Icons.thumb_up),
                )
              ],
            )
          )
      ),
    );
  }
}

2.解释源代码

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget{
  @override
  Widget build(BuildContext context ){
    return MaterialApp(
      title:'Text widget usage',
      home:Scaffold(
          body:
          Center(
            child: Column(
              mainAxisAlignment: MainAxisAlignment.center,
              children: <Widget>[
                RaisedButton(
                  onPressed: () => {}, //如果不写，则按钮为禁用状态
                  child: Text("我是RaiseButton按钮"),
                ),
                FlatButton(
                  onPressed: () => {},
                  child: Text("我是FlatButton按钮"),
                ),
                OutlineButton(
                  onPressed: () => {},
                  child: Text("我是OutlineButton按钮"),
                ),
                IconButton(
                  onPressed: () => {},
                  icon: Icon(Icons.thumb_up),
                )
              ],
            )
          )
      ),
    );
  }
}

3.效果图