在服务中处理 $http 响应

我最近发布了我面临的问题的详细描述here在这样。因为我无法发送实际的$http请求时，我使用超时来模拟异步行为。在 @Gloopy 的帮助下，从我的模型到视图的数据绑定工作正常

现在，当我使用$http代替$timeout（本地测试），我可以看到异步请求成功并且data我的服务中充满了 json 响应。但是，我的观点没有更新。

更新了普朗克here

这是一个可以做你想要的事情的 Plunk：http://plnkr.co/edit/TTlbSv?p=preview

这个想法是，您直接使用 Promise 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;
  });
});

这是一个稍微复杂的版本，它会缓存请求，因此您只需第一次执行（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;
    });
  };
});