我有这个轮询函数,每10000毫秒轮询数据,这很好,但我需要能够从外部访问变量,以便我可以使用splice
函数。
服务代码:
'use strict';
//service to get data for analytics page
angular
.module ('myApp')
.factory('Analyticshistory', function ($resource) {
return $resource('analytics_history.json',{}, {'query': {method: 'GET', isArray: false}});
});
控制器代码:
'use strict';
angular
.module('myApp')
.controller('analyticshistoryCtrl', ['$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'
}
}]);
我在这里做错了什么?
非常感谢您的帮助
答案 0 :(得分:1)
看起来像poller.get是异步调用。所以当你调用dataToSplice.splice(0,5)时; dataToSplice中可能没有数据。
这就是为什么拼接不能在promise.then()
之外工作的原因//在轮询器外面我想访问数据并将它们拼接到// 将它们传递给ng-grid dataToSplice.splice(0,5); //这不是 work $ scope.myData.splice(0,5); //这个不能正常工作
现在你有两个选择 -
继续您的选择方式1
或设置一个单独的事件处理程序(这可以在同一个Controller或另一个控制器中完成)并在pollerAnalyticsHistory.promise中调用$ emit。然后
查看我关于如何处理事件的帖子(通过$ on和$ emit) Angular Js newbie - link in a controller view that triggers another controller action
编辑:(这应该有用) -
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): 点击此处:http://plnkr.co/edit/xkQM7NA91JlmHcxat0Qn?p=preview
编辑(2014年8月18日): 忘了解开听众的束缚。 plunk更新。
答案 1 :(得分:0)
您可以在服务中使用$ rootscope.broadcast,然后通过$ scope.on在控制器中监听它。