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angularjs - 使用隔离范围时从指令调用控制器的功能？

问题描述

我想调用Controllerfrom的一个函数Directive，它是为了验证。但是当我使用隔离范围时，我对如何从指令中调用它有点困惑。这是指令的代码：-

App.directive('test',function(){
    return{
    require: "ngModel",
     scope:{
         a:"=",
         b:"=",
         c:'=',
         d:'='
            },
         link: function(scope, element, attributes,modelVal )
            {
            modelVal.$validators.test= function(val)
              {
                return false;
               //isolated scope values will make if condition true or false.
               if(scope.a=="true"){
                //I need to call a function of controller here. But how can 
                //i call that function from directive? this is my problem
                         } 
               }
             scope.$watch("a", function()
               {
                    modelVal.$validate();
                });

         }//end of link function;
      }//end of return;
});//end of directive;

Function在我的controller，我想我不需要写controller code。在我的 html 中，我将此指令称为：

     <test a="1" b="2" c="3" d="4" ng-model="abc"></test>

我需要做哪些更改directive才能调用controller functionwhich is $scope.testFunction()？

标签： angularjsangularjs-scopeangular-directiveisolated-scope

解决方案

var module = angular.module('myModule', []);

module.controller('TestController', function($scope){
  $scope.text = 'test';
  
  // Will be invoked from 'test' directive
  $scope.alertMe = function(text){
    alert(text);
  };
});

module.directive('test', function(){
  return {
    restrict: 'E',
    template: '<input ng-model="text" ng-change="onChange(text)" />',
    scope: {
      text: '='
    },
    link: function(scope, elem, attr){
      scope.onChange = function(text){
      
      // Invoking parent controller function
       scope.$parent.alertMe(text);
      }
    }
  }
})
<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script>
<body>

<div ng-app="myModule" ng-controller="TestController">
 
<test text="text"></test>

</div>
</body>
</html>

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