angularjs - Angular $rootScope.$on 未定义

Question

我的 Controller 中有以下内容。

$rootScope.$on('progressbarEvent', function (event, data) {
    $rootScope.progresscurrent = data.currentprogress;
    console.log('Event listening: ' + $rootScope.progresscurrent);
});

I have this in a factory service.
   $rootScope.$emit('progressbarEvent', dataFactory.currentprogress);

$on 返回未定义。有谁知道这是什么原因吗？

我的 Controller 是:

app.controller('indexcontroller', ['$rootScope','$scope', '$http', 'dataFactory',
       function ($scope,$http,$rootScope, dataFactory) {

Answer 1

依赖项的顺序必须与其声明的数组一致:

app.controller('indexcontroller', ['$rootScope','$scope', '$http', 'dataFactory',
   function ($rootScope, $scope, $http, dataFactory) {