javascript - 输入 radio ng-model 毕竟没有更新

Question

我试图解决一个难题，为什么输入 [radio] 控件的 ng-model 没有按我预期的那样设置。 加载页面后，所有 radio 都会正确启动。单击不同的控件会更改 radioVal 变量 - 它的值呈现在页面中。

问题是它看起来只发生在 DOM 中。当我调试代码时，$scope.radioVal 总是一样的…… modalDialog 的隔离范围不包含 radioVal 属性。

radio ng-model 是在哪个范围内创建的？它是它的不同实例吗？

---

可以找到工作代码here on jsfiddle .

---

我的 html 代码是:

<div ng-app = "app"> 
 <div ng-controller="mainCtrl">         
   <a ng-click="showModalDlg()">Click me</a>
   <br/><br/>
   <modal-dialog show="showModal" action="actionFun">                        
    <form>
      <input type="radio" ng-model="radioVal" value="1">One<br/>
      <input type="radio" ng-model="radioVal" value="nothing changes me">Two<br/>
      <input type="radio" ng-model="radioVal" value="3">Three<br/>
          <br/><br/>
          The model changes in the DOM as expected: <b>radioVal = {{radioVal | json}}</b>
          <br/>
          but by pressing the Action button you can see that the model has not been modified. 
    </form>                        
    <a class="button" action>Action</a>                     
    </modal-dialog>
   </div>
</div>

我的 Angular 代码:

angular.module('common', [])
    .controller('mainCtrl', ['$scope', function($scope){

        $scope.showModal = false;
        $scope.radioVal = "nothing changes me";

        $scope.showModalDlg = function() {
           $scope.showModal = !$scope.showModal;
        };

        $scope.actionFun = function() {
           console.log('actionFun ...' + $scope.radioVal);
        };        

    }]).directive('modalDialog',
        function () {
            return {
               restrict: 'E',
               scope: {
                  show: '=',
                  action: '&',
               },
               replace: true,
               transclude: true,
               link: function (scope, element, attrs) {

                        scope.hideModal = function () {
                           scope.show = false;
                           scope.$apply();
                        };

                        $('a[hide]', element).on('click', function(){
                           scope.hideModal();
                        });

                        $('a[action]', element).on('click', function(){
                           console.log('There is no radioVal in isolated scope either ... ' + scope.radioVal);
                           scope.action()();
                           scope.hideModal();
                        });
                  },
            template: '<div class=\'ng-modal\' ng-show=\'show\'><div class=\'ng-modal-overlay\'></div><div class=\'ng-modal-dialog\' ng-style=\'dialogStyle\'><div class=\'ng-modal-dialog-content\' ng-transclude></div></div></div>'
        }
    });

  angular.module('app', ['common'])

Answer 1

始终在 ng-model 中放置一个点

您目前正在尝试将原语传递给嵌套范围，这将破坏双向绑定(bind)。但是，如果您传递一个对象，它将保持对原始对象的引用

简单地改变:

$scope.radioVal = "nothing changes me";

收件人:

 $scope.myModel={radioVal : "nothing changes me"};

并在 ng-model 中使用点

<input  ng-model="myModel.radioVal">

更改继承，因此更改绑定(bind)。

DEMO