用vscode创建第一个flutter项目
今天教大家
用vscode创建第一个项目
创建新项目
在安装了 Flutter 扩展的 VS Code 中，通过选择View ▸ Command Palette...或在 macOS 上按Command-Shift-P或在 Linux 或 Windows 上按Control-Shift-P打开命令面板。在面板中输入Flutter: New并按Return。
默认第一个。直接按return
这个时候选择一个文件夹创建。
然后返回这个界面。给自己的项目命名。
这个就是创建后的项目结构
启动调试
运行-启动调试
我没有连真机，所以显示的是我安装的浏览器
然后直接运行，VSCode 只需要按 F5 快捷键就行了。
然后你就可以看到 VSCode 弹出一个框让你选择运行项目的环境：
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老铁，听我说，选 “ Dart & Flutter ” 就对了。
然后稍等一下吧，项目会编译，然后自动生成内容，其实就是 Dart 转换成 JavaScript 的过程。
Dart 原本就是（谷歌）想代替 JavaScript 而发明的，可以转换成 JavaScript 代码。
感觉 Dart 走了曲线救国的方式，终于走到这步 —— 代替 JavaScript。
最后，你会看到你系统默认的浏览器会弹出一个新的窗口来运行你的项目。（感觉刚开始有点慢吧。。。。）
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下面我们来看看项目的目录：
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web/index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<script defer src="main.dart.js" type="application/javascript"></script>
</head>
<body>
</body>
</html>
web/main.dart
// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'package:flutter_web_ui/ui.dart' as ui;
import 'package:aaaaaaa/main.dart' as app;
main() async {
await ui.webOnlyInitializePlatform();
app.main();
}
lib/main.dart
import 'package:flutter_web/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatelessWidget {
MyHomePage({Key key, this.title}) : super(key: key);
final String title;
@override
Widget build(BuildContext context) {
// The Flutter framework has been optimized to make rerunning build methods
// fast, so that you can just rebuild anything that needs updating rather
// than having to individually change instances of widgets.
return Scaffold(
appBar: AppBar(
title: Text(title),
),
body: Center(
// Center is a layout widget. It takes a single child and positions it
// in the middle of the parent.
child: Column(
// Column is also layout widget. It takes a list of children and
// arranges them vertically. By default, it sizes itself to fit its
// children horizontally, and tries to be as tall as its parent.
//
// Invoke "debug painting" (choose the "Toggle Debug Paint" action
// from the Flutter Inspector in Android Studio, or the "Toggle Debug
// Paint" command in Visual Studio Code) to see the wireframe for each
// widget.
//
// Column has various properties to control how it sizes itself and
// how it positions its children. Here we use mainAxisAlignment to
// center the children vertically; the main axis here is the vertical
// axis because Columns are vertical (the cross axis would be
// horizontal).
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text(
'Hello, World!',
),
],
),
), // This trailing comma makes auto-formatting nicer for build methods.
);
}
}
本文就大致介绍到这里吧，不管怎么说 Flutter 跑在 Web 上面而且不是试验性质的，是正式版的，这是令人多么激动无比啊，我也情不自禁为其写下一篇相关文章。