Angularjs如何从外部访问的数据范围 [英] Angularjs how to access scope data from outside

问题描述

我有民调数据中的每10000ms这是很好的，但是我需要能够从外部访问的变量，这样我可以用这个轮询功能拼接功能。

I have this poller function that polls data every 10000ms which is fine, however I need to be able to access variable from outside so that I can use splice function.

code服务：

'use strict';
//service to get data for analytics page
angular
    .module ('myApp')
    .factory('Analyticshistory', function ($resource) {
        return $resource('analytics_history.json',{}, {'query': {method: 'GET', isArray: false}});
      });

code的控制器：

code for controller:

   'use strict';
    angular
        .module('myApp')
        .controller('analyticshistoryCtrl', ['$scope', 'poller', 'Analyticshistory', function ($scope, poller, Analyticshistory) {

            var dataToSplice;
            var pollerAnalyticsHistory;
            pollerAnalyticsHistory = poller.get (Analyticshistory, {delay: 10000});
            pollerAnalyticsHistory.promise.then (null, null, function (data) {


                //this works fine but it splices 
                //data every 10000ms which is not good
                $scope.myData = data.analytics.splice(0,5);


               //I'm trying this to access this outside
               $scope.myData = data.analytics;
               dataToSplice = $scope.myData;

              });

             //outside the poller here I want to access data and splice them
             //to pass them into to ng-grid
             dataToSplice.splice(0,5);//this does not work
             $scope.myData.splice(0,5);//this doe not work either


             $scope.gridOptions = {
                data: 'myData',
                columnDefs: 'columns'
             }
 }]);

我在做什么错在这里？

what am I doing wrong here?

非常感谢帮助

PLUNKER： http://plnkr.co/edit/ui279rL9JZvxgUJXlkLB?p=preVIEW

推荐答案

看起来像poller.get是一个异步调用。所以你的时候调用dataToSplice.splice（0,5）;数据可能不是present那里dataToSplice

looks like poller.get is an asynchronous call . So by the time you call dataToSplice.splice(0,5); data may not be present there in dataToSplice.

这就是为什么拼接不起作用外promise.then的原因（）

Thats the reason why splice doesn't work outside promise.then()

//轮询这里外我想访问数据，并且它们拼接//对
  它们传递到到NG-电网dataToSplice.splice（0,5）; //这不
  工作$ scope.myData.splice（0,5）; //这母鹿也不行

//outside the poller here I want to access data and splice them //to pass them into to ng-grid dataToSplice.splice(0,5);//this does not work $scope.myData.splice(0,5);//this doe not work either

现在你有两个选择 -

Now you have two options -

1. 继续与你正在做的是选择的方式1

1. continue with the way you are doing as option 1

或设置一个单独的事件处理程序（可以在同一个控制器或其他控制器完成），并调用$放出里面pollerAnalyticsHistory.promise.then

or setup a separate event handler (this can be done in same Controller or another controller) and call $emit inside pollerAnalyticsHistory.promise.then

看我的岗位上如何处理事件（通过$ $和发射）
<一href=\"http://stackoverflow.com/questions/25301581/angular-js-newbie-link-in-a-controller-view-that-triggers-another-controller-a/25305951#25305951\">Angular JS新手 - 在控制器视图链接触发另一个控制器动作

Look at my post on how to handle events (through $on and $emit) Angular Js newbie - link in a controller view that triggers another controller action

编辑：（这应该工作） -

Edit : (this should work) -

angular
    .module('myApp')
    .controller('analyticshistoryCtrl', ['$rootScope', '$scope', 'poller', 'Analyticshistory', function ($rootScope, $scope, poller, Analyticshistory) {


$rootScope.$on("SpliceHandler", function(evt, next, current) {
           $scope.myData.splice(0,5);
}

pollerAnalyticsHistory.promise.then (null, null, function (data) {

           //I'm trying this to access this outside
           $scope.myData = data.analytics;
           dataToSplice = $scope.myData;

$scope.$emit("SpliceHandler");
}

}]);    

编辑（2014年8月16日）：
看看这里： http://plnkr.co/edit/xkQM7NA91JlmHcxat0Qn?p=$p $ PVIEW

编辑（2014年8月18日）：
忘了取消绑定监听器。普拉克更新。

Edit(8/18/2014) : forgot to unbind the listener. plunk updated.

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