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从AngularJS中的指令调用父控制器的方法

angularjs-directive angularjs

Sam · 技术社区 · 13 年前

继我之前 question ,我现在正试图从指令中调用父控制器上的一个方法。我得到一个未定义的参数。我是这样做的:

<body ng-app="myApp" ng-controller="MainCtrl">
  <span>{{mandat.rum}}</span>
  <span>{{mandat.surname}}</span>
<input type="text" ng-model="mandat.person.firstname" />
<my-directive mandate-person="mandat.person" updateparent="updatePerson()" >

  </my-directive>
</body>

以及脚本:

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

    app.controller('MainCtrl', function ($scope) {
        $scope.mandat = { name: "John", surname: "Doe", person: { id: 1408, firstname: "sam" } };
        $scope.updatePerson = function(person) {
            alert(person.firstname);
          $scope.mandat.person = person;   
        }
    });


    app.directive('myDirective', function () {
        return {
            restrict: 'E',
            template: "<div><span>{{mandatePerson.id}}<span><input type='text' ng-model='mandatePerson.firstname' /><button ng-click='updateparent({person: mandatePerson})'>click</button></div>",
            replace: true,
            scope: { mandatePerson: '=', updateparent: '&' }
            }
        }
    )

当updatePerson方法被调用时,person是未定义的。

jsfiddle在这里: http://jsfiddle.net/graphicsxp/Z5MBf/7/

4 回复 | 直到 9 年前

Ajay Singh Beniwal 13 年前

只需简单地更改您的html如下

<my-directive mandate-person="mandat.person" updateparent="updatePerson(person)" >

      </my-directive>

你没有通过updatePerson传递“person”,这就是它不起作用的原因

Ziv Weissman 8 年前

访问控制器方法意味着从指令控制器/链接/作用域访问父作用域上的方法。

如果指令是共享/继承父作用域,那么只调用父作用域方法是非常直接的。

当您想要从隔离指令范围访问父范围方法时,只需要做少量的工作。

很少有选项(可能比下面列出的更多)可以从隔离指令范围调用父范围方法或监视父范围变量( 选项#6 特别是)。

笔记我用过的 link function 在这些示例中,但您可以使用 directive controller 以及基于需求。

选项#1。 通过对象文字和从指令html模板

index.html

<!DOCTYPE html>
<html ng-app="plunker">

  <head>
    <meta charset="utf-8" />
    <title>AngularJS Plunker</title>
    <script>document.write('<base href="' + document.location + '" />');</script>
    <link rel="stylesheet" href="style.css" />
    <script data-require="angular.js@1.3.x" src="https://code.angularjs.org/1.3.9/angular.js" data-semver="1.3.9"></script>
    <script src="app.js"></script>
  </head>

  <body ng-controller="MainCtrl">
    <p>Hello {{name}}!</p>

    <p> Directive Content</p>
    <sd-items-filter selected-items="selectedItems" selected-items-changed="selectedItemsChanged(selectedItems)" items="items"> </sd-items-filter>


    <P style="color:red">Selected Items (in parent controller) set to: {{selectedItemsReturnedFromDirective}} </p>

  </body>

</html>

itemfilterTemplate.html

<select ng-model="selectedItems" multiple="multiple" style="height: 200px; width: 250px;" ng-change="selectedItemsChanged({selectedItems:selectedItems})" ng-options="item.id as item.name group by item.model for item in items | orderBy:'name'">
  <option>--</option>
</select>

app.js

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

app.directive('sdItemsFilter', function() {
  return {
    restrict: 'E',
    scope: {
      items: '=',
      selectedItems: '=',
      selectedItemsChanged: '&'
    },
    templateUrl: "itemfilterTemplate.html"
  }
})

app.controller('MainCtrl', function($scope) {
  $scope.name = 'TARS';

  $scope.selectedItems = ["allItems"];

  $scope.selectedItemsChanged = function(selectedItems1) {
    $scope.selectedItemsReturnedFromDirective = selectedItems1;
  }

  $scope.items = [{
    "id": "allItems",
    "name": "All Items",
    "order": 0
  }, {
    "id": "CaseItem",
    "name": "Case Item",
    "model": "PredefinedModel"
  }, {
    "id": "Application",
    "name": "Application",
    "model": "Bank"
    }]

});

工作plnkr: http://plnkr.co/edit/rgKUsYGDo9O3tewL6xgr?p=preview

选项#2。通过对象文字和从指令链接/作用域

索引html

<!文档类型html>
<html ng app=“plunker”>

<头部>
<meta字符集=“utf-8”/>
<标题>AngularJS Plunker</标题>
<脚本>document.write('<base href=“'+document.location+'”/>')</脚本>
<链接rel=“stylesheet”href=“style.css”/>
<脚本数据要求=“angular.js@1.3.x“src=”https://code.angularjs.org/1.3.9/angular.js“data semver=”1.3.9“></script>
<script src=“app.js”></脚本>
</头部>

<body ng controller=“MainCtrl”>
<p>您好{{name}}</p>

<p>指令内容</p>
<sd项目筛选所选项目=“selectedItems”所选项目已更改=“selectedItemsChanged(selectedItems)”项目=“items”></sd项目筛选器>


<P style=“color:红色”>所选项目(在父控制器中)设置为:{{selectedItemsReturnedFromDirective}}</p>

</身体>

</html>

itemfilterTemplate.html

<select ng-model="selectedItems" multiple="multiple" style="height: 200px; width: 250px;" 
 ng-change="selectedItemsChangedDir()" ng-options="item.id as item.name group by item.model for item in items | orderBy:'name'">
  <option>--</option>
</select>

应用程序.js

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

app.directive('sdItemsFilter', function() {
  return {
    restrict: 'E',
    scope: {
      items: '=',
      selectedItems: '=',
      selectedItemsChanged: '&'
    },
    templateUrl: "itemfilterTemplate.html",
    link: function (scope, element, attrs){
      scope.selectedItemsChangedDir = function(){
        scope.selectedItemsChanged({selectedItems:scope.selectedItems});  
      }
    }
  }
})

app.controller('MainCtrl', function($scope) {
  $scope.name = 'TARS';

  $scope.selectedItems = ["allItems"];

  $scope.selectedItemsChanged = function(selectedItems1) {
    $scope.selectedItemsReturnedFromDirective = selectedItems1;
  }

  $scope.items = [{
    "id": "allItems",
    "name": "All Items",
    "order": 0
  }, {
    "id": "CaseItem",
    "name": "Case Item",
    "model": "PredefinedModel"
  }, {
    "id": "Application",
    "name": "Application",
    "model": "Bank"
    }]
});

工作plnkr: http://plnkr.co/edit/BRvYm2SpSpBK9uxNIcTa?p=preview

选项#3。通过函数引用和指令html模板

索引html

<!DOCTYPE html>
<html ng-app="plunker">

  <head>
    <meta charset="utf-8" />
    <title>AngularJS Plunker</title>
    <script>document.write('<base href="' + document.location + '" />');</script>
    <link rel="stylesheet" href="style.css" />
    <script data-require="angular.js@1.3.x" src="https://code.angularjs.org/1.3.9/angular.js" data-semver="1.3.9"></script>
    <script src="app.js"></script>
  </head>

  <body ng-controller="MainCtrl">
    <p>Hello {{name}}!</p>

    <p> Directive Content</p>
    <sd-items-filter selected-items="selectedItems" selected-items-changed="selectedItemsChanged" items="items"> </sd-items-filter>


    <P style="color:red">Selected Items (in parent controller) set to: {{selectedItemsReturnFromDirective}} </p>

  </body>

</html>

itemfilterTemplate.html

<select ng-model="selectedItems" multiple="multiple" style="height: 200px; width: 250px;" 
 ng-change="selectedItemsChanged()(selectedItems)" ng-options="item.id as item.name group by item.model for item in items | orderBy:'name'">
  <option>--</option>
</select>

应用程序.js

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

app.directive('sdItemsFilter', function() {
  return {
    restrict: 'E',
    scope: {
      items: '=',
      selectedItems:'=',
      selectedItemsChanged: '&'
    },
    templateUrl: "itemfilterTemplate.html"
  }
})

app.controller('MainCtrl', function($scope) {
  $scope.name = 'TARS';

  $scope.selectedItems = ["allItems"];

  $scope.selectedItemsChanged = function(selectedItems1) {
    $scope.selectedItemsReturnFromDirective = selectedItems1;
  }

  $scope.items = [{
    "id": "allItems",
    "name": "All Items",
    "order": 0
  }, {
    "id": "CaseItem",
    "name": "Case Item",
    "model": "PredefinedModel"
  }, {
    "id": "Application",
    "name": "Application",
    "model": "Bank"
    }]
});

工作plnkr: http://plnkr.co/edit/Jo6FcYfVXCCg3vH42BIz?p=preview

选项#4。通过函数引用和指令链接/作用域

索引html

<!DOCTYPE html>
<html ng-app="plunker">

  <head>
    <meta charset="utf-8" />
    <title>AngularJS Plunker</title>
    <script>document.write('<base href="' + document.location + '" />');</script>
    <link rel="stylesheet" href="style.css" />
    <script data-require="angular.js@1.3.x" src="https://code.angularjs.org/1.3.9/angular.js" data-semver="1.3.9"></script>
    <script src="app.js"></script>
  </head>

  <body ng-controller="MainCtrl">
    <p>Hello {{name}}!</p>

    <p> Directive Content</p>
    <sd-items-filter selected-items="selectedItems" selected-items-changed="selectedItemsChanged" items="items"> </sd-items-filter>


    <P style="color:red">Selected Items (in parent controller) set to: {{selectedItemsReturnedFromDirective}} </p>

  </body>

</html>

itemfilterTemplate.html

<select ng-model="selectedItems" multiple="multiple" style="height: 200px; width: 250px;" ng-change="selectedItemsChangedDir()" ng-options="item.id as item.name group by item.model for item in items | orderBy:'name'">
  <option>--</option>
</select>

应用程序.js

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

app.directive('sdItemsFilter', function() {
  return {
    restrict: 'E',
    scope: {
      items: '=',
      selectedItems: '=',
      selectedItemsChanged: '&'
    },
    templateUrl: "itemfilterTemplate.html",
    link: function (scope, element, attrs){
      scope.selectedItemsChangedDir = function(){
        scope.selectedItemsChanged()(scope.selectedItems);  
      }
    }
  }
})

app.controller('MainCtrl', function($scope) {
  $scope.name = 'TARS';

  $scope.selectedItems = ["allItems"];

  $scope.selectedItemsChanged = function(selectedItems1) {
    $scope.selectedItemsReturnedFromDirective = selectedItems1;
  }

  $scope.items = [{
    "id": "allItems",
    "name": "All Items",
    "order": 0
  }, {
    "id": "CaseItem",
    "name": "Case Item",
    "model": "PredefinedModel"
  }, {
    "id": "Application",
    "name": "Application",
    "model": "Bank"
    }]

});

工作plnkr: http://plnkr.co/edit/BSqx2J1yCY86IJwAnQF1?p=preview

选项#5:通过ng模型和双向绑定,您可以更新父作用域变量。 因此,在某些情况下,您可能不需要调用父作用域函数。

索引html

<!DOCTYPE html>
<html ng-app="plunker">

  <head>
    <meta charset="utf-8" />
    <title>AngularJS Plunker</title>
    <script>document.write('<base href="' + document.location + '" />');</script>
    <link rel="stylesheet" href="style.css" />
    <script data-require="angular.js@1.3.x" src="https://code.angularjs.org/1.3.9/angular.js" data-semver="1.3.9"></script>
    <script src="app.js"></script>
  </head>

  <body ng-controller="MainCtrl">
    <p>Hello {{name}}!</p>

    <p> Directive Content</p>
    <sd-items-filter ng-model="selectedItems" selected-items-changed="selectedItemsChanged" items="items"> </sd-items-filter>


    <P style="color:red">Selected Items (in parent controller) set to: {{selectedItems}} </p>

  </body>

</html>

itemfilterTemplate.html

<select ng-model="selectedItems" multiple="multiple" style="height: 200px; width: 250px;" 
 ng-options="item.id as item.name group by item.model for item in items | orderBy:'name'">
  <option>--</option>
</select>

应用程序.js

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

app.directive('sdItemsFilter', function() {
  return {
    restrict: 'E',
    scope: {
      items: '=',
      selectedItems: '=ngModel'
    },
    templateUrl: "itemfilterTemplate.html"
  }
})

app.controller('MainCtrl', function($scope) {
  $scope.name = 'TARS';

  $scope.selectedItems = ["allItems"];

  $scope.items = [{
    "id": "allItems",
    "name": "All Items",
    "order": 0
  }, {
    "id": "CaseItem",
    "name": "Case Item",
    "model": "PredefinedModel"
  }, {
    "id": "Application",
    "name": "Application",
    "model": "Bank"
    }]
});

工作plnkr: http://plnkr.co/edit/hNui3xgzdTnfcdzljihY?p=preview

选项6:通过 $watch 和 $watchCollection 它是双向绑定 items 在以上所有示例中,如果在父作用域中修改了项,则指令中的项也将反映这些更改。

如果您想从父作用域中观察其他属性或对象,可以使用 $手表 和 $watchCollection系列 如下所示

html格式

<!DOCTYPE html>
<html ng-app="plunker">

<head>
  <meta charset="utf-8" />
  <title>AngularJS Plunker</title>
  <script>
    document.write('<base href="' + document.location + '" />');
  </script>
  <link rel="stylesheet" href="style.css" />
  <script data-require="angular.js@1.3.x" src="https://code.angularjs.org/1.3.9/angular.js" data-semver="1.3.9"></script>
  <script src="app.js"></script>
</head>

<body ng-controller="MainCtrl">
  <p>Hello {{user}}!</p>
  <p>directive is watching name and current item</p>
  <table>
    <tr>
      <td>Id:</td>
      <td>
        <input type="text" ng-model="id" />
      </td>
    </tr>
    <tr>
      <td>Name:</td>
      <td>
        <input type="text" ng-model="name" />
      </td>
    </tr>
    <tr>
      <td>Model:</td>
      <td>
        <input type="text" ng-model="model" />
      </td>
    </tr>
  </table>

  <button style="margin-left:50px" type="buttun" ng-click="addItem()">Add Item</button>

  <p>Directive Contents</p>
  <sd-items-filter ng-model="selectedItems" current-item="currentItem" name="{{name}}" selected-items-changed="selectedItemsChanged" items="items"></sd-items-filter>

  <P style="color:red">Selected Items (in parent controller) set to: {{selectedItems}}</p>
</body>

</html>

脚本app.js

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

app.directive('sdItemsFilter', function() {
  return {
    restrict: 'E',
    scope: {
      name: '@',
      currentItem: '=',
      items: '=',
      selectedItems: '=ngModel'
    },
    template: '<select ng-model="selectedItems" multiple="multiple" style="height: 140px; width: 250px;"' +
      'ng-options="item.id as item.name group by item.model for item in items | orderBy:\'name\'">' +
      '<option>--</option> </select>',
    link: function(scope, element, attrs) {
      scope.$watchCollection('currentItem', function() {
        console.log(JSON.stringify(scope.currentItem));
      });
      scope.$watch('name', function() {
        console.log(JSON.stringify(scope.name));
      });
    }
  }
})

 app.controller('MainCtrl', function($scope) {
  $scope.user = 'World';

  $scope.addItem = function() {
    $scope.items.push({
      id: $scope.id,
      name: $scope.name,
      model: $scope.model
    });
    $scope.currentItem = {};
    $scope.currentItem.id = $scope.id;
    $scope.currentItem.name = $scope.name;
    $scope.currentItem.model = $scope.model;
  }

  $scope.selectedItems = ["allItems"];

  $scope.items = [{
    "id": "allItems",
    "name": "All Items",
    "order": 0
  }, {
    "id": "CaseItem",
    "name": "Case Item",
    "model": "PredefinedModel"
  }, {
    "id": "Application",
    "name": "Application",
    "model": "Bank"
  }]
});

有关指令的详细解释,您可以随时参考AngularJs文档。

prava 11 年前

有两种方法,我们可以称之为使用 & 和 = .

如果我正在使用 = 对于scope属性 然后

ng-click='updateparent({person: mandatePerson})'

将更改为

ng-click='updateparent(mandatePerson)'

在指令中,

updateparent="updatePerson()"

将更改为

updateparent="updatePerson"

这里不需要提及参数,它们将作为引用传递给控制器的函数定义。

使用 & 在其他答案中进行了解释。

Ruslanas BalÄiÅ«nas 9 年前

这是另一种模式(适用于 角度1.5 ).

angular.module('module', [])

    .controller('MyController', function() {

        var self = this;
        self.msg = 0;
        // implement directive event listener interface
        this.onEvent = function(arg) {
            self.msg++;
        };
    })

    .directive('myDirective', function() {
        return {
          scope: {
            data: '=',
            handler: '='
          },
          template: '<button ng-click="handler.onEvent(data)">Emit event</button>'
        }
    });

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.6/angular.min.js"></script>


<div ng-app="module" ng-controller="MyController as ctrl">
<my-directive handler="ctrl" data="'...received'"></my-directive>
  {{ctrl.msg}}
</div>