ionic2如何升级到最新版本、配置开发环境

//解决安装后新建出现的bug
npm uninstall -g ionic
npm uninstall -g corodva
 
npm install -g ionic cordova

ionic plugin add cordova-plugin-crosswalk-webview

ionic run android

@NgModule({
  declarations: [
    MyApp,
    TabsPage,
    LoginPage
  ],
  imports: [
    IonicModule.forRoot(MyApp, {
      backButtonIcon: ‘arrow-back‘,
      iconMode: ‘ios‘,
      pageTransition: ‘ios‘,
      tabbarPlacement: ‘bottom‘,
      backButtonText: ‘返回‘
      }, {}
    )],
  bootstrap: [IonicApp],
  entryComponents: [
    LoginPage,
    MyApp,
    TabsPage
  ],
  providers: [UserService,AppConfigService,{provide: ErrorHandler, useClass: IonicErrorHandler}]
})

<button ion-button (click)="loginFn()"  color="danger" block default >
  立即登录
</button>

@Component({
  templateUrl: ‘login.html‘,
  selector: ‘login-page‘,
})

  "scripts": {
    "release": "ionic-app-scripts build --prod", //调用angular2提供的AOT，加快浏览器客户端编译，不过文件也许变大，可以使用服务器zigb压缩
  }  

//找到 node_modules//@ionic/app-scripts/dist/dev-server/http-server.js文件
//搜索proxyMiddleware,用http-proxy-middleware替换proxy-middleware
var proxyMiddleware = require(‘http-proxy-middleware‘);
 
//搜索proxy.proxyNoAgent，替换下面的语句
47                //if (proxy.proxyNoAgent) {
48                //    opts.agent = false;
49                //}
50                //opts.rejectUnauthorized = !(proxy.rejectUnauthorized === false);
51                app.use(proxy.path, proxyMiddleware({
52                  target: proxy.proxyUrl,
53                  changeOrigin: true
54                }));
55                //app.use(proxy.path, proxyMiddleware(opts));

@mixin addAppImage($imagePath) {
  background-image: url("../images/" + $imagePath);
}