传递给子指令时父指令控制器未定义

我在这里问了一般性问题这个帖子 https://stackoverflow.com/questions/42814530/pass-argument-between-parent-and-child-directives。我已经通过工作示例得到了答案；但是，当我尝试使用此示例修改现有代码时，出现错误。 请参阅下面和此中的我的代码笨蛋页面 https://plnkr.co/edit/IYqjYtx2RcHSz06XgGoT?p=preview.

Html

<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.5.3/angular.min.js"></script>
<div ng-app="myApp">
  <tmp-menu ng-disabled="true">
    <tmp-menu-link></tmp-menu-link>
    <tmp-menu-link></tmp-menu-link>
  </tmp-menu>
</div>

JavaScript（AngularJS）：

angular.module('myApp', [])
.controller('MyDirectiveController', MyDirectiveController)
.directive('tmpMenu', function() {
  return {
    restrict: 'AE',
    replace:true,
    transclude:true,
    scope:{
      disabled: '=?ngDisabled'
    },
    controller: 'MyDirectiveController',
    template: '<div>myDirective Disabled: {{ disabled }}<ng-transclude></ng-transclude></div>',
    link: function(scope, element, attrs) {


    }
  };
})
.directive('tmpMenuLink', function() {
  return {
    restrict: 'AE',
    replace:true,
    transclude:true,
    scope:{
    },
    required:'^^tmpMenu',
    template: '<div>childDirective disabled: {{ disabled }}</div>',
    link: function(scope, element, attrs, MyDirectiveCtrl) {
      console.log(MyDirectiveCtrl);

      scope.disabled = MyDirectiveCtrl.isDisabled();

    }
  };
})

function MyDirectiveController($scope) {
  this.isDisabled = function() {
    return $scope.disabled;
  };
}

内部指令tmp菜单链接, 我的指令Ctrl is 不明确的。 这是为什么？

您的代码中有一个拼写错误：

required:'^^tmpMenu',

将其更改为

require:'^^tmpMenu',

检查这个笨蛋

https://plnkr.co/edit/DgyW3OFgr1GyAR8fuATi?p=preview https://plnkr.co/edit/DgyW3OFgr1GyAR8fuATi?p=preview