類型錯誤：無法讀取屬性 '然後' 未定義

Question

我Service.js

appnService.factory('LocationService', function(){ 

var currentLocation = { 
    latitude:"", 
    longitude:"" 
} 

return { 
    GetLocation : function(){ 
    return navigator.geolocation.getCurrentPosition(function(pos){ 
      currentLocation.latitude = pos.coords.latitude; 
      currentLocation.longitude= pos.coords.longitude; 
      return currentLocation; 
    }); 
    } 
}; 

}); 

我控制器

appne.controller('NewObservationCtrl',function($scope,$state,LocationService) {  
LocationService.GetLocation().then(function(data){ 
console.log(data); 
}); 
}); 

但即時得到錯誤

類型錯誤：無法讀取屬性 '然後'在控制器中未定義

請幫忙

Answer 1

navigator.geolocation.getCurrentPosition(function() {}) return undefined。如果你想答應你必須解決延遲的對象與位置值

.factory('LocationService', function ($q) { 

var currentLocation = { 
    latitude: "", 
    longitude: "" 
} 

return { 
    GetLocation: function() { 
     var d = $q.defer(); 
     navigator.geolocation.getCurrentPosition(function (pos) { 
      currentLocation.latitude = pos.coords.latitude; 
      currentLocation.longitude = pos.coords.longitude; 
      d.resolve(currentLocation); 
     }); 
     return d.promise 
    } 
}; 

});