angularjs – 如果父项具有ng-if,则Angular ng-show不起作用

栏目: JavaScript · 发布时间: 5年前

内容简介：翻译自：https://stackoverflow.com/questions/20884786/angular-ng-show-not-working-if-parent-has-ng-if

我有一个视图,其中父div具有ng-if,并且一些子元素具有ng-show.当嵌套在具有ng-if的元素下时,ng-show似乎无法正常工作.这是一个Angular bug还是我做错了什么？ See this plunker

HTML：

<!-- with ng-if on the parent div, the toggle doesn't work -->
    <div ng-if="true">
      <div>
          visibility variable: {{showIt}}
      </div>
      <div ng-show="!showIt">
          <a href="" ng-click="showIt = true">Show It</a>
      </div>
      <div ng-show="showIt">
        This is a dynamically-shown div.
        <a href="" ng-click="hideIt()">Hide it</a>
      </div>
    </div>

    <br/><br/>

    <!-- with ng-show on the parent div, it works -->
    <div ng-show="true">
      <div>
          visibility variable: {{showIt}}
      </div>
      <div ng-show="!showIt">
          <a href="" ng-click="showIt = true">Show It</a>
      </div>
      <div ng-show="showIt">
        This is a dynamically-shown div.
        <a href="" ng-click="hideIt()">Hide it</a>
      </div>
    </div>

JavaScript：

scope.hideIt = function () {
  scope.showIt = false;
};

谢谢,

安迪

与ng-show不同,ng-if指令创建一个新范围.

因此,如果在子范围内而不是在主范围上设置showIt属性,则在ng内部编写showIt = true.

要修复它,请使用$parent访问父作用域上的属性：

<div ng-if="true">
   <div>
       visibility variable: {{showIt}}
   </div>
   <div ng-show="!showIt">
       <a href="" ng-click="$parent.showIt = true">Show It</a>
   </div>
   <div ng-show="showIt">
     This is a dynamically-shown div.
     <a href="" ng-click="hideIt()">Hide it</a>
   </div>
 </div>

演示 Plunker .

翻译自：https://stackoverflow.com/questions/20884786/angular-ng-show-not-working-if-parent-has-ng-if

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