如何等待从服务角度2

Question

响应这是我的代码

canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): boolean { 
    let isAuthenticated: boolean = false 
    this.authServiceLocal.isAuthenticated().then(response => isAuthenticated = response) 

    if(isAuthenticated){ 
     return true 
    } 

    // not logged in so redirect to login page with the return url 
    this.router.navigate(['/login'], { queryParams: { returnUrl: state.url }}); 
    return false 

    } 

我想等待服务的响应然后检查isAuthenticated 我正在从服务器真假值的值如预期的那样，在API调用中没有问题。

Answer 1

您可以等待响应，一旦数据available.Change代码以下

canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Promise<any> { 
     let isAuthenticated: boolean = false; 
     let result = new EventEmitter<boolean>(); 
     return this.authServiceLocal.isAuthenticated().then(response => {isAuthenticated = response; 
    if(isAuthenticated){ 

     } 
     else { 
      this.router.navigate(['/login'], { queryParams: { returnUrl: state.url }}); 
     result.emit(false); 
     result.complete(); 

     } 

     // not logged in so redirect to login page with the return url 

    }) 
    return result; 
     }