angularJS $broadcast和$on
发布时间:2020-12-17 07:26:01 所属栏目:安全 来源:网络整理
导读:有没有办法让$broadcast在初始化阶段将变量传播到$on? div ng-app='test' div ng-controller='testCtrl' span{{testContent}}/span /div div ng-controller="testCtrl2" input type='text' ng-change="updateContent()" ng-model="testContent2" / /div/div
有没有办法让$broadcast在初始化阶段将变量传播到$on?
<div ng-app='test'> <div ng-controller='testCtrl'> <span>{{testContent}}</span> </div> <div ng-controller="testCtrl2"> <input type='text' ng-change="updateContent()" ng-model="testContent2" /> </div> </div> var app = angular.module('test',[]); app.factory('sharedContent',function ($rootScope) { var standardContent; var resizeProportion; return { setStandardContent: function (newStandardContent) { standardContent = newStandardContent; $rootScope.$broadcast('updateContent'); console.log('broadcast'); },getStandardContent: function () { return standardContent; },setResizeProportion: function (newResizeProportion) { $rootScope.$broadcast('updateResizeProportion'); },} }); app.run(function (sharedContent) { sharedContent.setStandardContent('haha'); }); function testCtrl($scope,sharedContent) { $scope.testContent; $scope.$on('updateContent',function () { console.log('receive'); $scope.testContent = sharedContent.getStandardContent(); }); } function testCtrl2($scope,sharedContent) { $scope.testContent2 = 'test'; $scope.updateContent = function () { sharedContent.setStandardContent($scope.testContent2); }; } 示例小提琴:http://jsfiddle.net/jiaming/NsVPe/ 当输入发生变化时,跨度将显示该值,这是由于ng-change功能引起的. 但是,在初始化阶段,值“haha”未传播到$scope.testContent,因此在第一个运行时未显示任何内容.有没有办法让值“haha”出现在第一个运行时? 谢谢.
只需使用$timeout函数提供一点延迟.只需更新工厂中的代码即可开始工作.
请参考以下代码了解工厂: app.factory('sharedContent',function ($rootScope,$timeout) { var standardContent; var resizeProportion; return { setStandardContent: function (newStandardContent) { standardContent = newStandardContent; $timeout(function(){ $rootScope.$broadcast('updateContent'); },0) console.log('broadcast'); },} }); (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |