Access AngularJs directive variable inside controller

问题

I'm little bit new to Angularjs. What I want is access "$scope.myVar" variable inside 'myController' controller. It would be great help if you can provide a solution.

angular.module('myDirective', [])
        .controller('myController', ['$scope', function ($scope) {
               
            }])
        .directive('myDirective', function () {           
            return {
                scope: {
                    myVar: '='                  
                },
                controller: function ($scope) {  
                    $scope.myVar = 'xyz';
                    alert($scope.myVar);
                }
            };
        });

<html lang="en-US">  
    <script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
    <script type="text/javascript" src="newjavascript.js"></script>
    <body ng-app="myDirective">   
        <div ng-controller="myController">
            <my-directive></my-directive>>
        </div>
    </body>
</html>

回答1:

You just create a myVar variable in your controller and pass it to the directive using my-var attribute.

In your myController, Define myVar as

$scope.myVar= "Hello"

I your DOM, pass it to the directive as

<my-directive my-var="myVar"></my-directive>

Since you are using two way binding, any changes made to myVar by the directive are available in your controller.

You can put a watch on myVar to track the changes.

回答2:

angular.module('myDirective', [])
        .controller('myController', ['$scope', function ($scope) {
               $scope.show = function() {
                   alert($scope.myVar);
               }; 
            }])
        .directive('myDirective', function () {           
            return {
                scope: {
                    myVar: '='                  
                },
                controller: function ($scope) {  
                    $scope.myVar = 'xyz';
                    alert($scope.myVar);
                    $scope.$parent.myVar = $scope.myVar; // here you can access the controller scope by using $parent
                }
             };
        });

来源：https://stackoverflow.com/questions/34304809/access-angularjs-directive-variable-inside-controller

标签

angularjs

angularjs-directive

angularjs-controller