问通过带参数的指令调用控制器函数

EN

<div ng-app="component">
  <div ng-controller="ctrl">
    <span ng-repeat="i in myarray">
     <span  customattr  whattodo="addVal">{{i}}</span>
    </span>
  </div>

   function ctrl($scope) {
      $scope.myarray = [1];
      $scope.addVal = function (value) {
          $scope.myarray.push(value);
      }
   }

angular.module('component', []).directive('customattr', function () {
  return {
      restrict: 'A',
      link: function (scope, element, attrs) {
          var myVar = 5;
          scope.$apply(attrs.whattodo);
      } 
  }; 
});