Angular 我如何才能获得在canActivate上进行验证的承诺的价值？

我需要获取返回的值

this.isJwtValid（）

，但当前它没有返回

promise

结果的值，代码继续流动而不停止，我需要在此行中获取此

promise

的结果：

let token = this.isJwtValid() //I need get the value of the promise in this line

继续我的逻辑

我怎么做

这是我的代码：

export class verificarToken implements CanActivate {
  constructor(private router: Router, private storage: Storage) {}

  async isJwtValid() {
    const jwtToken: any = await this.storage.get("token");
    console.log(jwtToken); /// this is showed second
    if (jwtToken) {
      try {
        return JSON.parse(atob(jwtToken.split(".")[1]));
      } catch (e) {
        return false;
      }
    }
    return false;
  }

  canActivate(ruta: ActivatedRouteSnapshot, estado: RouterStateSnapshot) {

    let token = this.isJwtValid(); //I need get the value of token here
    if(token) {
      console.log(token) // this is showed first
      if (ruta.routeConfig.path == "login") {
        this.router.navigate(["/tabs/tab1"]);
      }
      return true;
    }
    this.storage.clear();
    this.router.navigate(["/login"]);
    return false;
  }
}

---

CanActivate可以返回承诺、可观察或价值， 所以你可以这样做

canActivate(ruta: ActivatedRouteSnapshot, estado: RouterStateSnapshot) {

    return this.isJwtValid().then(token => {

            if (token) {
                console.log(token) // this is showed first
                if (ruta.routeConfig.path == "login") {
                    this.router.navigate(["/tabs/tab1"]);

                    return true;
                }
                this.storage.clear();
                this.router.navigate(["/login"]);
                return false;
            });
    }
}

---

canActivate也可以回报承诺。因此，请使用async/await

async canActivate(ruta: ActivatedRouteSnapshot, estado: RouterStateSnapshot) {

    let token = await this.isJwtValid(); //I need get the value of token here
    if(token) {
      console.log(token) // this is showed first
      if (ruta.routeConfig.path == "login") {
        this.router.navigate(["/tabs/tab1"]);
      }
      return true;
    }
    this.storage.clear();
    this.router.navigate(["/login"]);
    return false;
  }
}
``