Angularjs通过指令监听ng-repeat渲染完成后执行脚本的方法

//要循环的数据
$scope.data = [
 {
  str: 'a'
 },
 {
  str: 'b'
 },
 {
  str: 'c'
 }
]
//自定义指令repeatFinish
app.directive('repeatFinish',function(){
 return {
  link: function(scope,element,attr){
   console.log(scope.$index)
   if(scope.$last == true){
    console.log('ng-repeat执行完毕')
   }
  }
 }
})
<div id="box">
 <span ng-repeat="item in data" repeat-finish>{{item.str}}</span>
</div>

<div id="box">
 <span ng-repeat="item in data" repeat-finish＝"renderFinish()">{{item.str}}</span>
</div>

app.directive('repeatFinish',function(){
 return {
  link: function(scope,element,attr){
   console.log(scope.$index)
   if(scope.$last == true){
    console.log('ng-repeat执行完毕')
    scope.$eval( attr.repeatFinish )
   }
  }
 }
})
//controller里对应的处理函数
$scope.renderFinish = function(){
 console.log('渲染完之后的操作')
}

app.directive('repeatFinish',function(){
 return {
  link: function(scope,element,attr){
   console.log(scope.$index)
   if(scope.$last == true){
    console.log('ng-repeat执行完毕')
    //向父控制器传递事件
    scope.$emit('to-parent');
    //向子控制器传递事件
    scope.$broadcast('to-child');
   }
  }
 }
})
//父控制器中监听事件
$scope.$on('to-parent',function(){
 //父控制器执行操作
})

//子控制器中监听事件
$scope.$on('to-child',function(){
 //子控制器执行操作
})