Angularjs 使用ng hide/ng show隐藏导航栏

我不能让这个导航栏只显示其中一个导航栏，它同时显示两个导航栏。我做错了什么

    <!-- Logged in -->
    <div ng-show="loggedIn">
      Navbar logged in
    </div>

    <!-- Logged out-->
    <div ng-hide="!loggedIn">
      Navbar logged out
    </div>

  </div>
</nav>

视图：

    <!-- Logged in -->
    <div ng-show="loggedIn">
      Navbar logged in
    </div>

    <!-- Logged out-->
    <div ng-hide="!loggedIn">
      Navbar logged out
    </div>

  </div>
</nav>

删除ng隐藏的“！”：

    <!-- Logged in -->
    <div ng-show="loggedIn">
      Navbar logged in
    </div>

    <!-- Logged out-->
    <div ng-hide="!loggedIn">
      Navbar logged out
    </div>

  </div>
</nav>

<!-- Logged out-->
<div ng-hide="loggedIn">
  Navbar logged out
</div>

导航栏注销

删除ng隐藏的“！”：

    <!-- Logged in -->
    <div ng-show="loggedIn">
      Navbar logged in
    </div>

    <!-- Logged out-->
    <div ng-hide="!loggedIn">
      Navbar logged out
    </div>

  </div>
</nav>

<!-- Logged out-->
<div ng-hide="loggedIn">
  Navbar logged out
</div>

导航栏注销

您需要更新条件

    <!-- Logged in -->
    <div ng-show="loggedIn">
      Navbar logged in
    </div>

    <!-- Logged out-->
    <div ng-hide="!loggedIn">
      Navbar logged out
    </div>

  </div>
</nav>

<div ng-hide="!loggedIn">

到

    <!-- Logged in -->
    <div ng-show="loggedIn">
      Navbar logged in
    </div>

    <!-- Logged out-->
    <div ng-hide="!loggedIn">
      Navbar logged out
    </div>

  </div>
</nav>

---

您需要更新条件

    <!-- Logged in -->
    <div ng-show="loggedIn">
      Navbar logged in
    </div>

    <!-- Logged out-->
    <div ng-hide="!loggedIn">
      Navbar logged out
    </div>

  </div>
</nav>

<div ng-hide="!loggedIn">

到

    <!-- Logged in -->
    <div ng-show="loggedIn">
      Navbar logged in
    </div>

    <!-- Logged out-->
    <div ng-hide="!loggedIn">
      Navbar logged out
    </div>

  </div>
</nav>

---

如果要以更好的性能修复此问题，不需要在DOM中保留隐藏的导航栏，可以使用：

    <!-- Logged in -->
    <div ng-show="loggedIn">
      Navbar logged in
    </div>

    <!-- Logged out-->
    <div ng-hide="!loggedIn">
      Navbar logged out
    </div>

  </div>
</nav>

<!-- Logged in -->
<div ng-if="loggedIn">
  Navbar logged in
</div>

<!-- Logged out-->
<div ng-if="!loggedIn">
  Navbar logged out
</div>

导航栏已登录
导航栏注销

如果要以更好的性能修复此问题，不需要在DOM中保留隐藏的导航栏，可以使用：

    <!-- Logged in -->
    <div ng-show="loggedIn">
      Navbar logged in
    </div>

    <!-- Logged out-->
    <div ng-hide="!loggedIn">
      Navbar logged out
    </div>

  </div>
</nav>

<!-- Logged in -->
<div ng-if="loggedIn">
  Navbar logged in
</div>

<!-- Logged out-->
<div ng-if="!loggedIn">
  Navbar logged out
</div>

导航栏已登录
导航栏注销