Question

我想在bootstrap的导航菜单上创建一个scrollspy效果，页面顶部有一个轮播，导航菜单位于轮播的底部。因此，当某人向下滚动时，在他通过导航菜单后，导航菜单将具有导航栏固定顶级类，并且查看器将看到菜单。我今天在这个问题上工作，但我找不到解决方案来解决这个问题。这是我的HTML代码：

<!DOCTYPE html>
<html>
  <head>
    <title>Bootstrap 101 Template</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- Bootstrap -->
    <link href="css/bootstrap.min.css" rel="stylesheet">
    <link href="css/style.css" rel="stylesheet">
    <link href='http://fonts.googleapis.com/css?family=Open+Sans:400,300,700' rel='stylesheet' type='text/css'>
    <script src="https://code.jquery.com/jquery.js"></script>

    <!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
    <!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
    <!--[if lt IE 9]>
      <script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
      <script src="https://oss.maxcdn.com/libs/respond.js/1.3.0/respond.min.js"></script>
    <![endif]-->
  </head>
  <body class="blog">

        <div id="carousel-example-generic" class="carousel slide" data-ride="carousel">
          <!-- Indicators -->
          <ol class="carousel-indicators">
            <li data-target="#carousel-example-generic" data-slide-to="0" class="active"></li>
            <li data-target="#carousel-example-generic" data-slide-to="1"></li>
            <li data-target="#carousel-example-generic" data-slide-to="2"></li>
          </ol>

          <!-- Wrapper for slides -->
          <div class="carousel-inner">
            <div class="item active">
              <img src="images/3.jpg" alt="slide1" style="width:100%">
              <div class="carousel-caption">
                <h3>What therefore god has joined together, Let no man seperate.</h3>
                <p>&ndash; The Bible : Mark 10:9 &ndash;</p>
              </div>
            </div>
            <div class="item">
              <img src="images/4.jpg" alt="slide2" style="width:100%">
              <div class="carousel-caption">
                <h3>Lorem Ipsum Header Dolor Sit Amet</h3>
                <p>&ndash; John Doe &ndash;</p>
              </div>
            </div>
            <div class="item">
              <img src="images/5.jpg" alt="slide3" style="width:100%">
              <div class="carousel-caption">
                <h3>Header Slider 3 Caption Text</h3>
                <p>&ndash; Holy Themeforest : Wordpress Category &ndash;</p>
              </div>
            </div>
          </div>

          <!-- Controls -->
          <a class="left carousel-control" href="#carousel-example-generic" data-slide="prev">
            <span class="glyphicon glyphicon-chevron-left"></span>
          </a>
          <a class="right carousel-control" href="#carousel-example-generic" data-slide="next">
            <span class="glyphicon glyphicon-chevron-right"></span>
          </a>
        </div>

<header>

    <nav class="navbar navbar-default" role="navigation">
          <!-- Brand and toggle get grouped for better mobile display -->
          <div class="navbar-header">
            <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1">
              <span class="sr-only">Toggle navigation</span>
              <span class="icon-bar"></span>
              <span class="icon-bar"></span>
              <span class="icon-bar"></span>
            </button>
            <a class="navbar-brand" href="#">Brand</a>
          </div>

          <!-- Collect the nav links, forms, and other content for toggling -->
          <div class="collapse navbar-collapse" id="bs-example-navbar-collapse-1">
            <ul class="nav navbar-nav navbar-right">
              <li class="active"><a href="#">Our Story</a></li>
              <li><a href="#">Time</a></li>
              <li><a href="#">Events</a></li>
              <li><a href="#">Photos</a></li>
              <li><a href="#">Gifts</a></li>
              <li><a href="#">From the Blog</a></li>
              <li><a href="#">RSVP</a></li>
            </ul>
          </div><!-- /.navbar-collapse -->
        </nav>

    </header>

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    <!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->

    <script src="js/functions.js"></script>
    <!-- Include all compiled plugins (below), or include individual files as needed -->
    <script src="js/bootstrap.min.js"></script>
  </body>
</html>

和functions.js：

// =============== Menu setup =============== //

    // checks if menu should be fixed
        function setup_menu(){
            if( !jQuery('body').hasClass('blog') && !jQuery('body').hasClass('single') && !jQuery('body').hasClass('archive') && !jQuery('body').hasClass('search') ){
                if(!$menu) $menu = jQuery(".navbar");
                if ( jQuery(window).scrollTop() > 200 && !$menu.hasClass("navbar-fixed-top") ){
                    $menu.addClass("navbar-fixed-top");
                } else if(jQuery(window).scrollTop() <= 200 && $menu.hasClass("navbar-fixed-top")) {
                    $menu.removeClass("navbar-fixed-top");
                }

        }

// =============== Menu setup END =============== //

另外，我想创建一个用于滚动到部分的scrollspy效果，如下所示：http://bit.ly/1hrjDZB我该怎么做？

Answer 1

1）在导航元素中添加ID

<nav id="yourID" class="navbar navbar-default" role="navigation">

2）将以下脚本添加到您的站点。

<script>
    function stickyNav() {

        if (window.pageYOffset > 20) {
            var x = document.getElementById('yourID');
            x.className = "navbar navbar-default navbar-fixed-top";
            } 
        else if (window.pageYOffset <= 20) {
            var x = document.getElementById('navigate');
            x.className = "navbar navbar-default";
            }
        }
    window.onload = stickyNav;
</script>

3）在你的身体元素上使用onscroll事件调用该函数。

<body onscroll="stickyNav(this)">

4）将window.pageYOffset的值调整为需要。

*注意：这并没有考虑到您的其他功能＆＃39; if / then语句。根据您的需要调整上述脚本。

如何在bootstrap中滚动后创建一个scrollspy navbar-fixed-top？

1 个答案: