这只是其中几种简单的方法，后续会补充，请持续关注

这是完整dome代码，直接复制放入main.dart就可以了

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
        theme: ThemeData(
          primarySwatch: Colors.red,
        ),
        home: Scaffold(
          appBar: AppBar(
            title: Text("text实例dome"),
          ),
          body: Center(
            child: Column(
              //垂直居中
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                Icon(Icons.person),
                SizedBox(
                  height: 10,
                ),
                //可以互交的icon
                IconButton(icon: Icon(Icons.error), onPressed: () {}),
                SizedBox(
                  height: 10,
                ),
                RaisedButton(
                  onPressed: () {},
                  child: Text("RaisedButton"),
                )
              ],
            ),
          ),
        ));
  }
}