Question

我只是尝试在Angular JS中创建一个服务，它成功调用函数$ http.get并返回值。但是，该值不会插入范围变量中。问题：出了什么问题？

 angular.module('starter.controllers', [])
.factory('UserService', function($http) {
var data;   
      return{
          getData: function($http) {
              return  $http.get('http://www.website.com/call12').
                    success(function(response) {
                     /// console.log(JSON.stringify(response));
                      userData=response.data;
                            return userData;

                   }).error(function(data, status, headers, config) {
                     // log error
                    });

          }
    }
 })


 .controller('AppCtrl', function($scope, $ionicModal,    $interval,$http,$rootScope,UserService) {

$scope.formData={};
 $scope.userData={};

$scope.myCtrl= function(UserService,$http,$rootScope) {

  UserService.getData($http).then(function(data,$rootScope) {
$scope.userData = data;

 $scope.fullName =  data.name;  
 $scope.balance =  data.balance;

   }}

  $scope.formData.playerName= $scope.userData.name; // $scope.userData is undefined

 $scope.myCtrl(UserService,$http);
 })

模板

<form ng-submit="submit_editpw()" ng-controller="AppCtrl">  
<pre>userData : {{userData}}</pre> //retuns data
<pre>name: {{fullName}}</pre> //returns empty
</form>

Answer 1

您没有使用异步getData方法。由于这是promise object，您应该使用其then方法：

UserService.getData().then(function(data) {
    $scope.userData = data;
});

还要确保getData返回一个承诺：

getData: function () {
    return $http.get('http://m.sepakbola.cc/index.php/id/user/call12').success(function (response) {
        userData = response.data;
        return userData;
    }).error(function (data, status, headers, config) {
        // log error
    });
}

Answer 2

在服务中将promise作为响应返回，并在控制器中使用promise success回调将值赋给userData

 angular.module('starter.controllers', [])
.factory('UserService', function($http) {
var data;   
      return{
          getData: function() {
                  return $http.get('http://www.website123.com/call12');
          }
    }
 })


 .controller('AppCtrl', function($scope, $ionicModal, interval,$http,$rootScope,UserService) {
      $scope.myCtrl= function(UserService,$http) {
      $scope.userData={};

      UserService.getData().success(function(reponse) {
          $scope.userData=response.data;
      });

}

在Angular JS中使用服务无法返回范围值

2 个答案: