AngularJS 在控制器之间共享异步服务数据 [英] AngularJS share asynchronous service data between controllers

问题描述

我知道这个问题在 stackoverflow 中被问过多次，但我找不到正确的答案.

我需要实现的是能够在一个控制器中启动一些异步调用，当结果返回时更新其他控制器中的 $scope.

我知道我应该使用实际执行 $http 内容的共享服务，但我无法更新其他控制器范围.

这是我的代码:

查看

<div class="scroller scroll-pane" frames-scroll-pane><div class="概览">{{帧}}

服务

 angular.module('BrightspotApp.models', []).factory('framesModel', function($http,globals){var api_path = 'clickard/GetClickardById/';var sharedService = {};sharedService.getAsync = 函数(id){sharedService.frames = {};$http.get(globals.serverUrl + api_path + id).成功(功能(数据，状态，标题，配置){sharedService.frames = 数据；}).error(function (data, status, headers, config) {console.log('HTTP 错误');});};返回共享服务；});

控制器

angular.module('BrightspotApp.controllers', [])./*** 顶部菜单控制器*/控制器('菜单控制器'，功能($scope，framesModel){$scope.clicked = false;$scope.toggle = 函数(项目){$scope.clicked = !$scope.clicked;如果($scope.clicked){frameModel.getAsync(1);}};$scope.itemClass = function(item) {返回 $scope.clicked ?活动":未定义；};})./*** 帧控制器*/控制器('framesController'，函数($scope，framesModel){$scope.data = [];$scope.frames = 框架模型；});

这个东西在某种意义上是有效的，当异步调用返回时，它实际上更新了 $scope 并因此更新了 DOM.

但是我需要实现的是在异步完成时获得回调(可能带有 $broadcast)以通知帧控制器，然后控制返回的数据，以便我可以在更新 $scope 之前对其进行操作以及 DOM.

非常感谢您的帮助.

解决方案

是这样的:

$http.get(globals.serverUrl + api_path + id).then(function(result){sharedService.frames = result.data;});

如果您希望 getAsync 方法在调用完成后返回数据，则可以使用 defer:

sharedService.getAsync = function (id) {sharedService.frames = {};var defer = $q.defer();$http.get(globals.serverUrl + api_path + id).然后(功能(结果){sharedService.frames = result.data;defer.resolve(result.data);}).error(function (data, status, headers, config) {console.log('HTTP 错误');});返回 defer.promise;};

I know this issue has been asked several times in stackoverflow, but I couldn't find a proper answer.

What I need to achieve is to be able to initiate some asynchronous call in one controller and when the result returns update the $scope in some other controller.

I understand that I should use a shared service that actually does the $http stuff, but I can't manage to update the other controller scope.

Here is my code:

View

<div class="screens" ng-controller="framesController">
   <div class="scroller scroll-pane" frames-scroll-pane>
         <div class="overview"> 
              {{frames}}                      
         </div>
   </div>
</div>

Service

 angular.module('BrightspotApp.models', []).
    factory('framesModel', function($http,globals){
       var api_path = 'clickard/GetClickardById/'; 
       var sharedService = {};

       sharedService.getAsync = function (id) { 
            sharedService.frames = {};

            $http.get(globals.serverUrl + api_path + id).
                success(function (data, status, headers, config) {
                    sharedService.frames = data;

                }).error(function (data, status, headers, config) {
                    console.log('HTTP error');
                });

        };

        return sharedService;

      });

Controllers

angular.module('BrightspotApp.controllers', []).

/**
* Top menu controller
*/
controller('menuController', function($scope,framesModel){
    $scope.clicked = false;
    $scope.toggle = function (item) {       
        $scope.clicked = !$scope.clicked;
        if ($scope.clicked){
               framesModel.getAsync(1);
        }
    };

    $scope.itemClass = function(item) {
        return $scope.clicked ? 'active' : undefined;
    };
}).
/**
 * Frames controller
 */ 
controller('framesController', function($scope,framesModel){

    $scope.data = [];
    $scope.frames = framesModel;
    });

This thing kind of works in the sense that it actually updates the $scope and consequently the DOM when the async call returns.

But what I need to achieve is to get a callback when the async finishes (maybe with a $broadcast) to notify the frames controller and then to have control over the returned data so that I can manipulate it before updating the $scope and consequently the DOM.

Assistance will be much appreciated.

解决方案

Something like this:

$http.get(globals.serverUrl + api_path + id).then(function(result){
    sharedService.frames = result.data;
});

If you want your getAsync method to return the data when the call has completed then you can use defer:

sharedService.getAsync = function (id) { 
    sharedService.frames = {};
    var defer = $q.defer();
    $http.get(globals.serverUrl + api_path + id).
    then(function(result){
        sharedService.frames = result.data;
        defer.resolve(result.data);
    }).error(function (data, status, headers, config) {
        console.log('HTTP error');
    });
    return defer.promise;
};

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