twitter-bootstrap - Bootstrap navbar - 从移动设备中删除固定标题

Question

如何将标题更改为不针对移动设备固定，但针对 md 和 lg 屏幕尺寸固定？

例如，您可以将导航类更改为；

手机:<nav class="navbar navbar-default" role="navigation">
桌面:<nav class="navbar navbar-default navbar-fixed-top" role="navigation">
??

<nav class="navbar navbar-default navbar-fixed-top" role="navigation">
    <div class="container">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#navbar-brand-centered">
        <span class="sr-only">Toggle navigation</span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
      </button>
      <div class="navbar-brand navbar-brand-centered">Brand</div>
    </div>
    <div class="collapse navbar-collapse" id="navbar-brand-centered">
      <ul class="nav navbar-nav">
        <li><a href="#">Link</a></li>
        <li><a href="#">Link</a></li>
        <li><a href="#">Link</a></li>
      </ul>
      <ul class="nav navbar-nav navbar-right">
        <li><a href="#">Link</a></li>
        <li><a href="#">Link</a></li>
        <li><a href="#">Link</a></li>           
      </ul>
    </div><!-- /.navbar-collapse -->
  </div><!-- /.container-fluid -->
</nav>

Answer 1

您想与移动设备或较小的屏幕尺寸隔离吗？有区别。如果你想要后者:

HTML:

<nav class="navbar navbar-default navbar-static-top" role="navigation">

CSS:

@media (min-width:992px) {

    body {padding-top:HEIGHTOFNAVBAR}
    .navbar-static-top {position:fixed;top:0;right:0;left:0;}

}

如果您想真正避免在移动设备上进行固定导航，您可以使用 javascript 来判断设备是否是触摸的。

/* --------------- SUPPORTS TOUCH OR NOT for IOS, Android, and Windows Mobile --------------- */
/*! Detects touch support and adds appropriate classes to html and returns a JS object  |  Copyright (c) 2013 Izilla Partners Pty Ltd  | http://www.izilla.com.au / Licensed under the MIT license  |  https://coderwall.com/p/egbgdw */
var supports = (function() {
    var d = document.documentElement,
        c = "ontouchstart" in window || navigator.msMaxTouchPoints;
    if (c) {
        d.className += " touch";
        return {
            touch: true
        }
    } else {
        d.className += " no-touch";
        return {
            touch: false
        }
    }
})();

然后就可以使用 HTML(同上):

<nav class="navbar navbar-default navbar-static-top" role="navigation">

CSS

  .no-touch body {padding-top:HEIGHTOFNAVBAR}
  .no-touch .navbar-static-top {position:fixed;top:0;right:0;left:0;}