我也有同样的问题，但当我在互联网上冲浪时，我明白$http返回默认的承诺，然后我可以在返回“数据”后使用“然后”。看看代码:

 app.service('myService', function($http) {
       this.getData = function(){
         var myResponseData = $http.get('test.json').then(function (response) {
            console.log(response);.
            return response.data;
          });
         return myResponseData;

       }
});    
 app.controller('MainCtrl', function( myService, $scope) {
      // Call the getData and set the response "data" in your scope.  
      myService.getData.then(function(myReponseData) {
        $scope.data = myReponseData;
      });
 });

我真的不喜欢这样一个事实，因为“承诺”的做事方式，使用$http的服务的消费者必须“知道”如何解包响应。

我只是想调用一些东西并得到数据，类似于旧的$scope。items = Data.getData();方法，现在已弃用。

我尝试了一段时间，没有想出一个完美的解决方案，但这是我最好的办法(Plunker)。它可能对某人有用。

app.factory('myService', function($http) {
  var _data;  // cache data rather than promise
  var myService = {};

  myService.getData = function(obj) { 
    if(!_data) {
      $http.get('test.json').then(function(result){
        _data = result.data;
        console.log(_data);  // prove that it executes once
        angular.extend(obj, _data);
      }); 
    } else {  
      angular.extend(obj, _data);
    }
  };

  return myService;
}); 

然后控制器:

app.controller('MainCtrl', function( myService,$scope) {
  $scope.clearData = function() {
    $scope.data = Object.create(null);
  };
  $scope.getData = function() {
    $scope.clearData();  // also important: need to prepare input to getData as an object
    myService.getData($scope.data); // **important bit** pass in object you want to augment
  };
});

我已经发现了一些缺陷

You have to pass in the object which you want the data added to, which isn't an intuitive or common pattern in Angular getData can only accept the obj parameter in the form of an object (although it could also accept an array), which won't be a problem for many applications, but it's a sore limitation You have to prepare the input object $scope.data with = {} to make it an object (essentially what $scope.clearData() does above), or = [] for an array, or it won't work (we're already having to assume something about what data is coming). I tried to do this preparation step IN getData, but no luck.

尽管如此，它提供了一种模式，可以删除控制器的“promise unwrap”样板文件，当您想在多个地方使用从$http获得的某些数据，同时保持其DRY时，这种模式可能很有用。

我认为更好的方式是这样的:

服务:

app.service('FruitsManager',function($q){

    function getAllFruits(){
        var deferred = $q.defer();

        ...

        // somewhere here use: deferred.resolve(awesomeFruits);

        ...

        return deferred.promise;
    }

    return{
        getAllFruits:getAllFruits
    }

});

在控制器中，你可以简单地使用:

$scope.fruits = FruitsManager.getAllFruits();

Angular会自动把解析后的awesomfruits放到$scope.fruits中。

这里有一个Plunk，可以做你想要的:http://plnkr.co/edit/TTlbSv?p=preview

其思想是直接使用承诺及其“then”函数来操作和访问异步返回的响应。

app.factory('myService', function($http) {
  var myService = {
    async: function() {
      // $http returns a promise, which has a then function, which also returns a promise
      var promise = $http.get('test.json').then(function (response) {
        // The then function here is an opportunity to modify the response
        console.log(response);
        // The return value gets picked up by the then in the controller.
        return response.data;
      });
      // Return the promise to the controller
      return promise;
    }
  };
  return myService;
});

app.controller('MainCtrl', function( myService,$scope) {
  // Call the async method and then do stuff with what is returned inside our own then function
  myService.async().then(function(d) {
    $scope.data = d;
  });
});

这里有一个稍微复杂一点的版本，它缓存了请求，所以您只在第一次发出请求(http://plnkr.co/edit/2yH1F4IMZlMS8QsV9rHv?p=preview):

app.factory('myService', function($http) {
  var promise;
  var myService = {
    async: function() {
      if ( !promise ) {
        // $http returns a promise, which has a then function, which also returns a promise
        promise = $http.get('test.json').then(function (response) {
          // The then function here is an opportunity to modify the response
          console.log(response);
          // The return value gets picked up by the then in the controller.
          return response.data;
        });
      }
      // Return the promise to the controller
      return promise;
    }
  };
  return myService;
});

app.controller('MainCtrl', function( myService,$scope) {
  $scope.clearData = function() {
    $scope.data = {};
  };
  $scope.getData = function() {
    // Call the async method and then do stuff with what is returned inside our own then function
    myService.async().then(function(d) {
      $scope.data = d;
    });
  };
});

与此相关，我也遇到过类似的问题，但不是用Angular的get或post，而是用第三方的扩展(在我的例子中是Chrome extension)。 我面临的问题是，Chrome扩展不会返回然后()，所以我无法做到上面的解决方案，但结果仍然是异步的。 因此，我的解决方案是创建一个服务，然后进行回调

app.service('cookieInfoService', function() {
    this.getInfo = function(callback) {
        var model = {};
        chrome.cookies.get({url:serverUrl, name:'userId'}, function (response) {
            model.response= response;
            callback(model);
        });
    };
});

然后在控制器中

app.controller("MyCtrl", function ($scope, cookieInfoService) {
    cookieInfoService.getInfo(function (info) {
        console.log(info);
    });
});

希望这篇文章可以帮助其他有同样问题的人。

在将UI绑定到数组时，您需要确保通过将长度设置为0并将数据推入数组来直接更新相同的数组。

而不是这个(设置一个不同的数组引用数据，你的UI不会知道):

 myService.async = function() {
    $http.get('test.json')
    .success(function (d) {
      data = d;
    });
  };

试试这个:

 myService.async = function() {
    $http.get('test.json')
    .success(function (d) {
      data.length = 0;
      for(var i = 0; i < d.length; i++){
        data.push(d[i]);
      }
    });
  };

下面是一个演示，显示了设置一个新数组与清空和添加到现有数组之间的区别。我不能让你的plnkr工作，但希望这对你有用!