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2023-07-07 05:00:00

一个AngularJS控制器可以调用另一个控制器吗?

是否可以让一个控制器使用另一个控制器?

例如:

这个HTML文档只是打印MessageCtrl控制器在MessageCtrl .js文件中传递的消息。

<html xmlns:ng="http://angularjs.org/">
<head>
    <meta charset="utf-8" />
    <title>Inter Controller Communication</title>
</head>
<body>
    <div ng:controller="MessageCtrl">
        <p>{{message}}</p>
    </div>

    <!-- Angular Scripts -->
    <script src="http://code.angularjs.org/angular-0.9.19.js" ng:autobind></script>
    <script src="js/messageCtrl.js" type="text/javascript"></script>
</body>
</html>

控制器文件包含以下代码:

function MessageCtrl()
{
    this.message = function() { 
        return "The current date is: " + new Date().toString(); 
    };
}

它只是打印当前日期;

如果我要添加另一个控制器DateCtrl，它将日期以特定格式返回给MessageCtrl，将如何进行此操作?DI框架似乎与xmlhttprequest和访问服务有关。

当前回答

下面是两个控制器共享服务数据的单页示例:

<!doctype html>
<html ng-app="project">
<head>
    <title>Angular: Service example</title>
    <script src="http://code.angularjs.org/angular-1.0.1.js"></script>
    <script>
var projectModule = angular.module('project',[]);

projectModule.factory('theService', function() {  
    return {
        thing : {
            x : 100
        }
    };
});

function FirstCtrl($scope, theService) {
    $scope.thing = theService.thing;
    $scope.name = "First Controller";
}

function SecondCtrl($scope, theService) {   
    $scope.someThing = theService.thing; 
    $scope.name = "Second Controller!";
}
    </script>
</head>
<body>  
    <div ng-controller="FirstCtrl">
        <h2>{{name}}</h2>
        <input ng-model="thing.x"/>         
    </div>

    <div ng-controller="SecondCtrl">
        <h2>{{name}}</h2>
        <input ng-model="someThing.x"/>             
    </div>
</body>
</html>

也在这里:https://gist.github.com/3595424

2012-09-02 06:51:53

其他回答

下面是一个与Angular JS无关的发布-订阅方法。

搜索参数控制器

//Note: Multiple entities publish the same event
regionButtonClicked: function () 
{
        EM.fireEvent('onSearchParamSelectedEvent', 'region');
},

plantButtonClicked: function () 
{
        EM.fireEvent('onSearchParamSelectedEvent', 'plant');
},

搜索选择控制器

//Note: It subscribes for the 'onSearchParamSelectedEvent' published by the Search Param Controller
localSubscribe: function () {
        EM.on('onSearchParamSelectedEvent', this.loadChoicesView, this);

});


loadChoicesView: function (e) {

        //Get the entity name from eData attribute which was set in the event manager
        var entity = $(e.target).attr('eData');

        console.log(entity);

        currentSelectedEntity = entity;
        if (entity == 'region') {
            $('.getvalue').hide();
            this.loadRegionsView();
            this.collapseEntities();
        }
        else if (entity == 'plant') {
            $('.getvalue').hide();
            this.loadPlantsView();
            this.collapseEntities();
        }


});

事件管理器

myBase.EventManager = {

    eventArray:new Array(),


    on: function(event, handler, exchangeId) {
        var idArray;
        if (this.eventArray[event] == null) {
            idArray = new Array();
        } else { 
            idArray = this.eventArray[event];
        }
        idArray.push(exchangeId);
        this.eventArray[event] = idArray;

        //Binding using jQuery
        $(exchangeId).bind(event, handler);
    },

    un: function(event, handler, exchangeId) {

        if (this.eventArray[event] != null) {
            var idArray = this.eventArray[event];
            idArray.pop(exchangeId);
            this.eventArray[event] = idArray;

            $(exchangeId).unbind(event, handler);
        }
    },

    fireEvent: function(event, info) {
        var ids = this.eventArray[event];

        for (idindex = 0; idindex < ids.length; idindex++) {
            if (ids[idindex]) {

                //Add attribute eData
                $(ids[idindex]).attr('eData', info);
                $(ids[idindex]).trigger(event);
            }
        }
    }
};

全球

var EM = myBase.EventManager;
2014-02-21 14:10:28

控制器之间有多种通信方式。

最好的可能是共享服务:

function FirstController(someDataService) 
{
  // use the data service, bind to template...
  // or call methods on someDataService to send a request to server
}

function SecondController(someDataService) 
{
  // has a reference to the same instance of the service
  // so if the service updates state for example, this controller knows about it
}

另一种方法是在作用域上释放事件:

function FirstController($scope) 
{
  $scope.$on('someEvent', function(event, args) {});
  // another controller or even directive
}

function SecondController($scope) 
{
  $scope.$emit('someEvent', args);
}

在这两种情况下，您也可以与任何指令通信。

2012-02-23 05:59:47

下面是两个控制器共享服务数据的单页示例:

<!doctype html>
<html ng-app="project">
<head>
    <title>Angular: Service example</title>
    <script src="http://code.angularjs.org/angular-1.0.1.js"></script>
    <script>
var projectModule = angular.module('project',[]);

projectModule.factory('theService', function() {  
    return {
        thing : {
            x : 100
        }
    };
});

function FirstCtrl($scope, theService) {
    $scope.thing = theService.thing;
    $scope.name = "First Controller";
}

function SecondCtrl($scope, theService) {   
    $scope.someThing = theService.thing; 
    $scope.name = "Second Controller!";
}
    </script>
</head>
<body>  
    <div ng-controller="FirstCtrl">
        <h2>{{name}}</h2>
        <input ng-model="thing.x"/>         
    </div>

    <div ng-controller="SecondCtrl">
        <h2>{{name}}</h2>
        <input ng-model="someThing.x"/>             
    </div>
</body>
</html>

也在这里:https://gist.github.com/3595424

2012-09-02 06:51:53

如果你正在寻找触发和广播事件来共享数据或跨控制器调用函数，请查看这个链接:并通过zbynour检查答案(答案具有最大投票)。我引用了他的答案!!

如果firstCtrl的作用域是secondCtrl作用域的父作用域，你的代码应该通过在firstCtrl中用$broadcast替换$emit来工作:

function firstCtrl($scope){
    $scope.$broadcast('someEvent', [1,2,3]);
}

function secondCtrl($scope){
    $scope.$on('someEvent', function(event, mass) {console.log(mass)});
}

如果你的作用域之间没有父子关系，你可以将$rootScope注入到控制器中，并将事件广播到所有的子作用域(也就是secondCtrl)。

function firstCtrl($rootScope){
    $rootScope.$broadcast('someEvent', [1,2,3]);
}

最后，当你需要从子控制器向上分派事件到作用域时，你可以使用$scope.$emit。如果firstCtrl作用域是secondCtrl作用域的父作用域:

function firstCtrl($scope){
    $scope.$on('someEvent', function(event, data) { console.log(data); });
}

function secondCtrl($scope){
    $scope.$emit('someEvent', [1,2,3]);
}
2014-10-15 13:26:05

有一个方法不依赖于服务$broadcast或$emit。它并不适用于所有情况，但如果你有两个相关的控制器可以抽象成指令，那么你可以在指令定义中使用require选项。这是ngModel和ngForm最可能的通信方式。你可以使用它在嵌套的指令控制器之间通信，或者在同一个元素上。

对于父母/孩子的情况，使用方法如下:

<div parent-directive>
  <div inner-directive></div>
</div>

在父指令中，使用要调用的方法，你应该在this(而不是$scope)上定义它们:

controller: function($scope) {
  this.publicMethodOnParentDirective = function() {
    // Do something
  }
}

在子指令定义上，你可以使用require选项，这样父控制器就被传递给了链接函数(这样你就可以从子指令的作用域调用它上的函数)。

require: '^parentDirective',
template: '<span ng-click="onClick()">Click on this to call parent directive</span>',
link: function link(scope, iElement, iAttrs, parentController) {
  scope.onClick = function() {
    parentController.publicMethodOnParentDirective();
  }
}

以上内容可以在http://plnkr.co/edit/poeq460VmQER8Gl9w8Oz?p=preview上看到

兄弟指令的用法类似，但两个指令都在同一个元素上:

<div directive1 directive2>
</div>

用于在directive1上创建一个方法:

controller: function($scope) {
  this.publicMethod = function() {
    // Do something
  }
}

在directive2中，可以使用require选项调用，这将导致siblingController被传递给link函数:

require: 'directive1',
template: '<span ng-click="onClick()">Click on this to call sibling directive1</span>',
link: function link(scope, iElement, iAttrs, siblingController) {
  scope.onClick = function() {
    siblingController.publicMethod();
  }
}

这可以在http://plnkr.co/edit/MUD2snf9zvadfnDXq85w?p=preview上看到。

它的用途是什么?

Parent: Any case where child elements need to "register" themselves with a parent. Much like the relationship between ngModel and ngForm. These can add certain behaviour that can affects models. You might have something purely DOM based as well, where a parent element needs to manage the positions of certain children, say to manage or react to scrolling. Sibling: allowing a directive to have its behaviour modified. ngModel is the classic case, to add parsers / validation to ngModel use on inputs.

2013-12-27 13:16:15

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