应用程序启动后,Ionic 2重定向到另一个页面

Question

我想在localStorage上已经有令牌时将页面重定向到主页(覆盖登录页面).怎么做？我在app.component.ts上的构造函数()上有以下代码,但它在请求完成之前首先显示登录

statusBar.backgroundColorByHexString('#D32F2F');
      splashScreen.hide();
      if(localStorage.getItem('token')){
        authProvider.silent_login().subscribe(res => {
          console.log(res);
          if(res.error==0){
            this.rootPage = HomePage;
          }
        })
      }

Answer 1

你能不能

    @ViewChild(Nav) nav: Nav;
    rootPage: any = null; // Initialize it as null
    pages: Array<{title: string, component: any}>;

    constructor(public platform: Platform, 
                public statusBar: StatusBar, 
                public splashScreen: SplashScreen,
                public commonProvider: CommonProvider) {

        this.commonProvider.retrieve("is_login").then(loggedIn => {
            // Assign the right page after checking the status
            this.rootPage = loggedIn ? TabsPage : SigninPage;
        });
     }