2

为什么需要为子控制器的 $scope 属性定义一个属性?

HTML 元素上的这个 ng-class 有效:

app.controller("mainController",['$anchorScroll','$scope','$location',function($anchorScroll,$scope,$location){
$scope.forms={};
}]);

app.controller("modalController",['$scope',function($scope){
  $scope.forms.contactForm = false;
  $scope.forms.toggleContactForm = function(){
        $scope.forms.contactForm = !$scope.forms.contactForm;
  }
}]);

<body ng-controller="mainController">
   <div ng-class="{hidden:!forms.contactForm}" id="contactForm" ng-controller="modalController"></div>
</body>

这个 ng-class 不会:

app.controller("mainController",['$anchorScroll','$scope','$location',function($anchorScroll,$scope,$location){
}]);

app.controller("modalController",['$scope',function($scope){
  $scope.contactForm = false;
  $scope.toggleContactForm = function(){
        $scope.contactForm = !$scope.contactForm;
  }
}]);

<body ng-controller="mainController">
    <div ng-class="{hidden:!contactForm}" id="contactForm" ng-controller="modalController"></div>
</body>
4

1 回答 1

4

因为在第一种情况下,您$scope.forms通过引用值访问(两个控制器都指向内存中的相同值),而在第二种情况下,您只需在子控制器中创建一个布尔原语,在这种情况下,父级完全不知道它(反之亦然)。

于 2013-08-07T03:54:53.897 回答