Angularjs:使用子指令设置父指令范围值 [英] Angularjs: set parent directive scope value with child directive

问题描述

我不确定这是不是这样做的方法，但我的目标如下:

• 我有一个父指令
• 在父指令的块内，我有一个子指令，它将从用户那里获得一些输入
• 子指令将在父指令的范围内设置一个值
• 我可以从那里拿走

当然问题是父和子指令是兄弟.所以我不知道如何做到这一点.注意 - 我不想在

中设置数据

小提琴:http://jsfiddle.net/rrosen326/CZWS4/

html:

<parent-dir dir-data="显示此数据"><child-dir></child-dir></parent-dir>

Javascript

var testapp = angular.module('testapp', []);testapp.controller('parentController', ['$scope', '$window', function ($scope, $window) {console.log('parentController scope id = ', $scope.$id);$scope.ctrl_data = "不相关的 ctrl 数据";}]);testapp.directive('parentDir', function factory() {返回 {限制:'非洲经委会'，范围: {ctrl_data: '@'},模板:'<div><b>parentDir scope.dirData:</b>{{dirData}} <div class="offset1" ng-transclude></div>

',替换:假，转置:真实，链接:函数(范围、元素、属性){scope.dirData = attrs.dirData;console.log("parent_dir 作用域:", scope.$id);}};});testapp.directive('childDir', function factory() {返回 {限制:'非洲经委会'，模板:'<h4>开始子指令</h4><input type="text" ng-model="dirData"/></br><div><b>childDir scope.dirData:</b>{{dirData}}</div>',替换:假，转置:假，链接:函数(范围、元素、属性){console.log("child_dir 作用域:", scope.$id);scope.dirData = "不，这个数据！";//默认文本}};});

解决方案

如果你想要那种通信，你需要在 child 指令中使用 require .这将需要父 controller，因此您需要一个 controller 具有您希望子指令使用的功能.

例如:

app.directive('parent', function() {返回 {限制:'E'，转置:真实，模板:'<div>{{message}}<span ng-transclude></span></div>',控制器:功能($范围){$scope.message = "原始父消息"this.setMessage = 函数(消息){$scope.message = 消息；}}}});

控制器在 $scope 中有一条消息，你有一个方法来改变它.

为什么一个在 $scope 中，另一个使用 this?您无法访问子指令中的 $scope，因此您需要在函数中使用 this 以便您的子指令能够调用它.

app.directive('child', function($timeout) {返回 {限制:'E'，要求:'^父母'，链接:函数(范围、元素、属性、父控件){$超时(功能(){parentCtrl.setMessage('我是孩子！')}, 3000)}}})

如您所见，该链接通过 parentCtrl 接收第四个参数(或者，如果有多个，则为一个数组).在这里，我们只需等待 3 秒钟，直到我们调用在父控制器中定义的方法来更改其消息.

在这里直播:http://plnkr.co/edit/72PjQSOlckGyUQnH7zOA?p=preview

I'm not sure this is the way to do this, but my goal is the following:

• I have a parent directive
• Inside the parent directive's block, I have a child directive that will get some input from the user
• The child directive will set a value in the parent directive's scope
• I can take it from there

Of course the problem is that the parent and child directives are siblings. So I don't know how to do this. Note - I do not want to set data in the

Fiddle: http://jsfiddle.net/rrosen326/CZWS4/

html:

<div ng-controller="parentController">
    <parent-dir dir-data="display this data">
        <child-dir></child-dir>
    </parent-dir>
</div>

Javascript

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

testapp.controller('parentController', ['$scope', '$window', function ($scope, $window) {
    console.log('parentController scope id = ', $scope.$id);
    $scope.ctrl_data = "irrelevant ctrl data";
}]);

testapp.directive('parentDir', function factory() {
    return {
        restrict: 'ECA',
        scope: {
            ctrl_data: '@'
        },
        template: '<div><b>parentDir scope.dirData:</b> {{dirData}} <div class="offset1" ng-transclude></div> </div>',
        replace: false,
        transclude: true,
        link: function (scope, element, attrs) {
            scope.dirData = attrs.dirData;
            console.log("parent_dir scope: ", scope.$id);
        }
    };
});

testapp.directive('childDir', function factory() {
    return {
        restrict: 'ECA',
        template: '<h4>Begin child directive</h4><input type="text"  ng-model="dirData" /></br><div><b>childDir scope.dirData:</b> {{dirData}}</div>',
        replace: false,
        transclude: false,
        link: function (scope, element, attrs) {
            console.log("child_dir scope: ", scope.$id);
            scope.dirData = "No, THIS data!"; // default text
        }
    };
});

解决方案

If you want that kind of communication, you need to use require in the child directive. That will require the parent controller so you need a controller there with the functionality you want the children directives to use.

For example:

app.directive('parent', function() {
  return {
    restrict: 'E',
    transclude: true,
    template: '<div>{{message}}<span ng-transclude></span></div>',
    controller: function($scope) {
      $scope.message = "Original parent message"

      this.setMessage = function(message) {
        $scope.message = message;
      }
    }
  }
});

The controller has a message in the $scope and you have a method to change it.

Why one in $scope and one using this? You can't access the $scope in the child directive, so you need to use this in the function so your child directive will be able to call it.

app.directive('child', function($timeout) {
  return {
    restrict: 'E',
    require: '^parent',
    link: function(scope, elem, attrs, parentCtrl) {
      $timeout(function() {
        parentCtrl.setMessage('I am the child!')
      }, 3000)
    }
  }
})

As you see, the link receives a fourth param with the parentCtrl (or if there is more than one, an array). Here we just wait 3 seconds until we call that method we defined in the parent controller to change its message.

See it live here: http://plnkr.co/edit/72PjQSOlckGyUQnH7zOA?p=preview

这篇关于Angularjs:使用子指令设置父指令范围值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！