如何獲得，而回調響應使用$ http.post方法angularjs

Question

I try to throw error modal window when the gps not enable. perhaps it's enabled then it will call servcie callback using $http.post method. But without gps function it's working and return promises fine. if use GPS method above the post method then i got some error like "Uncaught TypeError: Cannot read property 'then' of undefined" What's wrong with my code. Anyone can give me some idea..

服務工廠工廠使用GPS探測器函數中：

.service('DataServiceFactory', function($http, $rootScope){   //dynamic $http JSON Data Passing service 
      return{ 
       serviceDataReq : function(reqUrl, reqData){ 
        cordova.plugins.diagnostic.isGpsLocationEnabled(function(enabled){ 
         if(enabled == 1){ 
          return $http.post(reqUrl, reqData); 
         }else{ 
          $rootScope.ErrorMsg = "Please Turn On your GPS location.."; 
          $('#ErrorModal').modal('show'); 
         } 
        }, function(error){ 
         $rootScope.ErrorMsg = "GPS location Error : "+error; 
         $('#ErrorModal').modal('show'); 
        }) 
       } 
      } 
     }) 

在控制器：

DataServiceFactory.serviceDataReq($rootScope.primaryLiveServiceApiUrl, angular.toJson($scope.LoginAuthReq)).then(function(response) { 

}, function(error){ 

}); 

Answer 1

我現在沒有cordova的例子來測試你的代碼，但看着它，我會說，如果設備沒有GPS功能ilities，你的服務方法沒有回覆承諾。

我會做這樣的事情：

.service('DataServiceFactory', function($q, $http, $rootScope){   //dynamic $http JSON Data Passing service 
     return { 
      serviceDataReq: function(reqUrl, reqData){ 
       var deferred = $q.defer(); 
       cordova.plugins.diagnostic.isGpsLocationEnabled(function(enabled){ 
        if(enabled == 1){ 
         deferred.resolve($http.post(reqUrl, reqData)); 
        }else{ 
         $rootScope.loaded = false; 
         $rootScope.ErrorMsg = "Please Turn On your GPS location.."; 
         $('#ErrorModal').modal('show'); 
         deferred.reject("Please Turn On your GPS location.."); 
        } 
       }, function(error){ 
        $rootScope.ErrorMsg = "GPS location Error : "+error; 
        $('#ErrorModal').modal('show'); 
        deferred.reject("GPS location Error : "+error); 
       }); 
       return deferred.promise; 
      } 
      }; 
    })