$locationChangeSuccess 与 $stateChangeSuccess

Question

使用 angular-ui-router，$on监听事件变化时$locationChangeSuccess  能监听到，$stateChangeSuccess 监听不到，是什么原因；代码如下：.run(['$rootScope','$location', function($rootScope, $location) {  $rootScope.$on('$stateChangeSuccess', function(newV) {//****这是无效的          $rootScope.path = $location.path();  });        $rootScope.$on('$locationChangeSuccess', function(newV) {          $rootScope.path = $location.path();  });}])