如何使用$ q从AngularJS服务返回已解决的承诺？ [英] How to return a resolved promise from an AngularJS Service using $q?

问题描述

我的服务是：

myApp.service('userService', [
  '$http', '$q', '$rootScope', '$location', function($http, $q, $rootScope, $location) {
    var deferred;
    deferred = $q.defer();
    this.initialized = deferred.promise;
    this.user = {
      access: false
    };
    this.isAuthenticated = function() {
      this.user = {
        first_name: 'First',
        last_name: 'Last',
        email: '[e-mail]',
        access: 'institution'
      };
      return deferred.resolve();
    };
  }
]);

我在 config 中调用它文件来自：

I'm calling this in my config file via:

myApp.run([
  '$rootScope', 'userService', function($rootScope, userService) {
    return userService.isAuthenticated().then(function(response) {
      if (response.data.user) {
        return $rootScope.$broadcast('login', response.data);
      } else {
        return userService.logout();
      }
    });
  }
]);

然而，它抱怨然后不是一个功能。我不回复已解决的承诺吗？

However, it complains that then is not a function. Aren't I returning the resolved promise?

推荐答案

从您的服务方式：

function serviceMethod() {
    return $timeout(function() {
        return {
            property: 'value'
        };
    }, 1000);
}

在您的控制器中：

serviceName
    .serviceMethod()
    .then(function(data){
        //handle the success condition here
        var x = data.property
    });

这篇关于如何使用$ q从AngularJS服务返回已解决的承诺？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！