03.Flutter之使用外部包

Flutter之使用外部包

1.打开pubspec.yaml,并添加english_words外部包依赖可以在 https://pub.dartlang.org/flutter/ 上找到english_words软件包以及其他许多开源软件包

dependencies:
  flutter:
    sdk: flutter

  cupertino_icons: ^0.1.2
  english_words: ^3.1.0

2.点击Packages get下载并导入english_words外部包依赖

3.在lib/main.dart中引入english_words

import 'package:flutter/material.dart';
import 'package:english_words/english_words.dart';

4.使用 english words 包生成文本来替换字符串“Hello World”

import 'package:flutter/material.dart';
import 'package:english_words/english_words.dart';

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

class MyApp extends StatelessWidget {

  @override
  Widget build(BuildContext context) {
    final wordPair = new WordPair.random();
    return new MaterialApp(
      title: 'Welecom to Flutter',
      home: new Scaffold(
        appBar: new AppBar(
          title: new Text('Welecom to Flutter'),
        ),
        body: new Center(
//          child: new Text('Hello World'),
            child: new Text(wordPair.asPascalCase),
        ),
      ),
    );
  }

}

5.运行结果