angular同一个页面多个controller值传递

<div ng-controller="ParentCtrl">                  //父级  
    <div ng-controller="SelfCtrl">                //自己  
        <a ng-click="click()">click me</a>  
        <div ng-controller="ChildCtrl"></div>     //子级  
    </div>  
    <div ng-controller="BroCtrl"></div>           //平级  
</div> 

phonecatControllers.controller('SelfCtrl', function($scope) {      $scope.click = function () {          $scope.$broadcast('to-child', 'child');          $scope.$emit('to-parent', 'parent');      }  });    phonecatControllers.controller('ParentCtrl', function($scope) {      $scope.$on('to-parent', function(d,data) {          console.log(data);         //父级能得到值      });      $scope.$on('to-child', function(d,data) {          console.log(data);         //子级得不到值      });  });    phonecatControllers.controller('ChildCtrl', function($scope){      $scope.$on('to-child', function(d,data) {          console.log(data);         //子级能得到值      });      $scope.$on('to-parent', function(d,data) {          console.log(data);         //父级得不到值      });  });    phonecatControllers.controller('BroCtrl', function($scope){      $scope.$on('to-parent', function(d,data) {          console.log(data);        //平级得不到值      });      $scope.$on('to-child', function(d,data) {          console.log(data);        //平级得不到值      });  }); 

用$broadcast赋的值，只能子级能得到值，父级得不到，用$emit赋的值，只能父级得到值，子级得不到。平级都得不到值