Flutter 有状态控件

每次都会随机出字符串

image.png

安装依赖 ：english_words: ^3.1.0

在pubspace.yaml添加

dependencies:
  flutter:
    sdk: flutter
  cupertino_icons: ^0.1.2
  english_words: ^3.1.0

终端命令行执行

flutter packges get

代码

import 'package:flutter/material.dart';
import 'package:english_words/english_words.dart';//引入模块

void main() => runApp(new MyApp());//ruanAPP


//2点，创建1.StatefulWidget 表示动态的，2.StatelessWidget 表示 不可变的
class RandomWord extends StatefulWidget{
  @override
  createState() =>new RandomColorState();
}
class RandomColorState extends State<RandomWord>{
  @override
  Widget build(BuildContext context) {
    final wordPair = new WordPair.random();
    return new Text(wordPair.asPascalCase);
  }
}

class MyApp extends StatelessWidget {
  @override
 Widget build(BuildContext context) {
    // TODO: implement build
    return new MaterialApp(
      title: 'ysfhj',
      home: new Scaffold(
        appBar: new AppBar(
          title: new Text('ssss'),
        ),
        body: new Center(
          child: new RandomWord(),//使用它
        ),
      ),
    );
  }
}

送人玫瑰，手留余香。