使用$scope。$emit和$scope.$on

如何将我的$scope对象从一个控制器发送到另一个使用。$emit和。$on方法?

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

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

这不是我想的那样。$emit和$on如何工作?

当前回答

你必须使用$rootScope在同一个应用程序的控制器之间发送和捕获事件。下面是一个工作示例。

app.controller('firstCtrl', function($scope, $rootScope) {        
        function firstCtrl($scope) {
        {
            $rootScope.$emit('someEvent', [1,2,3]);
        }
}

app.controller('secondCtrl', function($scope, $rootScope) {
        function secondCtrl($scope)
        {
            $rootScope.$on('someEvent', function(event, data) { console.log(data); });
        }
}

链接到$scope对象的事件只在所有者控制器中工作。控制器之间的通信是通过$rootScope或Services完成的。

2016-01-10 07:01:39

其他回答

下面的代码显示了两个子控制器，事件从它们向上分派到父控制器(rootScope)

<body ng-app="App">

    <div ng-controller="parentCtrl">

        <p>City : {{city}} </p>
        <p> Address : {{address}} </p>

        <div ng-controller="subCtrlOne">
            <input type="text" ng-model="city" />
            <button ng-click="getCity(city)">City !!!</button>
        </div>

        <div ng-controller="subCtrlTwo">

            <input type="text" ng-model="address" />
            <button ng-click="getAddrress(address)">Address !!!</button>

        </div>

    </div>

</body>

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

// parent controller
App.controller('parentCtrl', parentCtrl);

parentCtrl.$inject = ["$scope"];

function parentCtrl($scope) {

    $scope.$on('cityBoom', function(events, data) {
        $scope.city = data;
    });

    $scope.$on('addrBoom', function(events, data) {
        $scope.address = data;
    });
}

// sub controller one

App.controller('subCtrlOne', subCtrlOne);

subCtrlOne.$inject = ['$scope'];

function subCtrlOne($scope) {

    $scope.getCity = function(city) {

        $scope.$emit('cityBoom', city);    
    }
}

// sub controller two

App.controller('subCtrlTwo', subCtrlTwo);

subCtrlTwo.$inject = ["$scope"];

function subCtrlTwo($scope) {

    $scope.getAddrress = function(addr) {

        $scope.$emit('addrBoom', addr);   
    }
}

http://jsfiddle.net/shushanthp/zp6v0rut/

2015-05-08 14:36:56

这是我的函数:

$rootScope.$emit('setTitle', newVal.full_name);

$rootScope.$on('setTitle', function(event, title) {
    if (scope.item) 
        scope.item.name = title;
    else 
        scope.item = {name: title};
});

2014-09-11 10:37:05

最简单的方法:

超文本标记语言

  <div ng-app="myApp" ng-controller="myCtrl"> 

        <button ng-click="sendData();"> Send Data </button>

    </div>

JavaScript

    <script>
        var app = angular.module('myApp', []);
        app.controller('myCtrl', function($scope, $rootScope) {
            function sendData($scope) {
                var arrayData = ['sam','rumona','cubby'];
                $rootScope.$emit('someEvent', arrayData);
            }

        });
        app.controller('yourCtrl', function($scope, $rootScope) {
            $rootScope.$on('someEvent', function(event, data) {
                console.log(data); 
            }); 
        });
    </script>

2017-06-19 09:31:06

作用域可用于将事件传播、分派到作用域的子对象或父对象。

$emit -将事件传播到父节点。$broadcast -向儿童传播事件。监听事件的方法，由$emit和$broadcast传播。

index . html示例:

<div ng-app="appExample" ng-controller="EventCtrl">
      Root(Parent) scope count: {{count}}
  <div>
      <button ng-click="$emit('MyEvent')">$emit('MyEvent')</button>
      <button ng-click="$broadcast('MyEvent')">$broadcast('MyEvent')</button><br>

      Childrent scope count: {{count}} 
  </div>
</div>

示例app.js:

angular.module('appExample', [])
.controller('EventCtrl', ['$scope', function($scope) {
  $scope.count = 0;
  $scope.$on('MyEvent', function() {
    $scope.count++;
  });
}]);

在这里你可以测试代码: http://jsfiddle.net/zp6v0rut/41/

2017-03-22 14:59:56

<!DOCTYPE html>
<html>

<head>
<script src= "http://ajax.googleapis.com/ajax/libs/angularjs/1.3.14/angular.min.js"></script>
<script>
var app = angular.module('MyApp',[]);
app.controller('parentCtrl',function($scope){
  $scope.$on('MyEvent',function(event,data){    
    $scope.myData = data;
  });
 });

app.controller('childCtrl',function($scope){
  $scope.fireEvent = function(){ 
  $scope.$emit('MyEvent','Any Data');
  }  
 });
</script>
</head>
<body ng-app="MyApp">
<div ng-controller="parentCtrl" ng-model="myName">

{{myData}}

 <div ng-controller="childCtrl">
   <button ng-click="fireEvent()">Fire Event</button>
 </div>

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

2015-04-13 13:25:38

使用$scope。$emit和$scope.$on

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