我在 AngularJS 中有两个具有相同 ng-controller 的 div，如何让它们共享信息? [英] I have two divs with the same ng-controller in AngularJS, how can I make them share information?

问题描述

我的 html 代码中有两个不同的 div 标签，它们引用了 AngularJS 中的同一个控制器.我怀疑的是，由于这些 div 不是嵌套的，因此它们每个都有自己的控制器实例，因此两者的数据不同.

<ul><li ng-repeat="alert in alerts"><div class="span4">{{alert.msg}}</div>
<div ng-controller="AlertCtrl"><form ng-submit="addAlert()"><button type="submit" class="btn">添加提醒</button></表单>

我知道这可以通过在第一个 div 中包含按钮来轻松解决，但我觉得这是一个非常干净和简单的示例，可以传达我想要实现的目标.如果我们按下按钮并将另一个对象添加到我们的警报数组中，则更改将不会反映在第一个 div 中.

function AlertCtrl($scope) {$scope.alerts = [{类型:'错误'，msg: '哦，啪！更改一些内容，然后再次尝试提交.}, {类型:'成功'，msg: '干得好！您已成功阅读此重要警报消息.}];$scope.addAlert = function() {$scope.alerts.push({类型:'成功'，msg: "另一个警报！"});};}

解决方案

这是一个很常见的问题.似乎最好的方法是创造服务/价值并在两者之间分享.

mod.service('yourService', function() {this.sharedInfo='默认值';});函数 AlertCtrl($scope, yourService) {$scope.changeSomething = function() {yourService.sharedInfo = '来自一个控制器的另一个值';}$scope.getValue = function() {返回 yourService.sharedInfo;}}

{{getValue()}}
<div ng-controller="AlertCtrl">{{getValue()}}</div>

I have two different div tags in my html code referencing the same controller in AngularJS. What I suspect is that since these divs aren't nested they each have their own instance of the controller, thus the data is different in both.

<div ng-controller="AlertCtrl">
<ul>
    <li ng-repeat="alert in alerts">
        <div class="span4">{{alert.msg}}</div>
    </li>
</ul>
</div>        
<div ng-controller="AlertCtrl">
<form ng-submit="addAlert()">
    <button type="submit" class="btn">Add Alert</button>
</form>
</div>

I know this could easily be fixed by including the button in the first div but I feel this is a really clean and simple example to convey what I am trying to achieve. If we were to push the button and add another object to our alerts array the change will not be reflected in the first div.

function AlertCtrl($scope) {

$scope.alerts = [{
    type: 'error',
    msg: 'Oh snap! Change a few things up and try submitting again.'
}, {
    type: 'success',
    msg: 'Well done! You successfully read this important alert message.'
}];

$scope.addAlert = function() {
    $scope.alerts.push({
        type: 'sucess',
        msg: "Another alert!"
    });
};
}

解决方案

This is a very common question. Seems that the best way is to create a service/value and share between then.

mod.service('yourService', function() {
  this.sharedInfo= 'default value';
});


function AlertCtrl($scope, yourService) {
  $scope.changeSomething = function() {
    yourService.sharedInfo = 'another value from one of the controllers';
  }

  $scope.getValue = function() {
    return yourService.sharedInfo;
  }
}

<div ng-controller="AlertCtrl">{{getValue()}}</div>
<div ng-controller="AlertCtrl">{{getValue()}}</div>

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