Question

大家好我想跟着这个Example并为我的网站做同样的事情，但是我不能让我的导航栏工作并按照屏幕关闭。我已经尝试了很多但不确定发生了什么。

HTML：

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- The above 3 meta tags *must* come first in the head; any other head content must come *after* these tags -->
    <title>Bootstrap 101 Template</title>

    <!-- Bootstrap -->
    <link href="css/bootstrap.min.css" rel="stylesheet">
    <link href="css/custom.css" rel="stylesheet">

  </head>
  <body>
    <div class="parallax">
        <div class="avater" style="background-image: url('Images/Pic1.jpg');background-size: cover;"></div>
            <div class="info1">
                <h1>Hero</h1>
                <h2>Play play play</h2>
         </div>
    </div>
     <nav class="navbar navbar-default">
      <div class="container">
        <div class="navbar-header">
          <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false" aria-controls="navbar">
            <span class="sr-only">Toggle navigation</span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
            <span class="icon-bar"></span>
          </button>
        </div>
        <div id="navbar" class="navbar-collapse collapse">
          <ul class="nav navbar-nav">
            <li class="active"><a href="#">Home</a></li>
            <li><a href="#about">Section 1</a></li>
            <li><a href="#contact">Section 2</a></li>
            <li><a href="#contact">Section 3</a></li>
          </ul>
        </div><!--/.nav-collapse -->
      </div>
    </nav>

    <div class="section">
    <h1> Section 1 <h1>
    </div>      

    <div class="section2">
    <h1> Section 2 <h1>
    </div>      

        <div class="section3">
    <h1> Section 3 <h1>
    </div>      










    <!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
    <!-- Include all compiled plugins (below), or include individual files as needed -->
    <script src="js/bootstrap.min.js"></script>
    <script>
   $(document).ready(function(){
       $(window).bind('scroll', function() {
       var navHeight = $( window ).height() - 70;
             if ($(window).scrollTop() > navHeight) {
                 $('navbar').addClass('fixed');
             }
             else {
                 $('navbar').removeClass('fixed');
             }
        });
    });
</script>
  </body>
</html>

CSS：

    body {
        font-family: 'Open Sans', sans-serif, Arial;
        font-size: 16px;
        color: #6D6D6D;
        background-color: #F5F5F5;
        font-weight: 300;
    }

    h1,h2,h3,h4,h5,h6 {
        font-family: 'Montserrat', sans-serif, Arial;
        padding-bottom: 5px;
        color: #373432;
        line-height: 1em;
        font-weight: normal;
    }

    a {
        text-decoration: none;
        outline: none;
    }

    /* Header  */
    .parallax {
        background-image: url("../Images/back1.jpg");
        min-height: 700px;
        background-attachment: fixed;
        background-position: center;
        background-repeat: no-repeat;
        background-size: cover;
        padding: 100px 20px;
    }

    .avater {
        width: 260px;
        height: 260px;
        border-radius: 50%;
        position: relative;
        cursor: default;
        box-shadow: inset 0 0 0 0 rgba(200, 95, 66, 0.4), inset 0 0 0 16px rgba(255, 255, 255, 0.16), 0 1px 2px rgba(0, 0, 0, 0.1);
        margin: 0 auto;

    }

    .info1 {
        text-align: center;
        margin-top: 40px;
    }

    .info1 > h1 {
        font-size: 60px;
        color: #FFFFFF;
    }

    .info1 > h2 {
        color: #FFFFFF;
        font-size: 30px;
    }


    /* Navbar  */

.fixed {
    position: fixed; 
    top: 0; 
    height: 70px; 
    z-index: 1;
}
.navbar {
    margin-bottom: 0px;
    left: 0;
    top: 0;
    width: 100%;
    list-style: none;
    height: 70px; 
}
.navbar-nav {
    float: none;
    margin: 0;
    text-align: center;
}
.navbar-nav > li {
    float: none;
    display: inline-block;
}
.navbar-nav > li > a {
    line-height: 38px;
}
.navbar-nav > li > a.active {
    background-color: #E7E7E7;
}
.navbar-default .navbar-nav > li > a:hover,
.navbar-default .navbar-nav > li > a:focus {
    color: #333333;
    background-color: #E7E7E7;
}

.navbar-toggle {
    background-color: #000000;
    background-image: none;
    border-radius: 4px;
    float: right;
    margin-bottom: 8px;
    margin-right: 15px;
    margin-top: 18px;
    padding: 9px 10px;
    position: relative;

}
.navbar-inverse .navbar-toggle .icon-bar {
    background-color: #2DCC70;
}
.navbar-default .navbar-toggle:hover,
.navbar-default .navbar-toggle:focus {
    background-color: #000000;
}
.navbar-inverse .navbar-collapse,
.navbar-inverse .navbar-form {
    border-color: transparent;
}

    .section{
        background-color:Red;
        height: 1000px;
        margin: 0;
    }

    .section h1 {
        margin: 0;
    }

    .section2{
        background-color:blue;
        height: 1000px;
            margin: 0;
    }

    .section3{
        background-color:Black;
        height: 1000px;
            margin: 0;
    }

如果我更改var navHeight = $（window）.height（） - 70;到277它工作正常但是如果我让屏幕变小，它会直接向上拍摄而不等待它真的很奇怪对此事的任何帮助都会很棒

谢谢

Answer 1

道歉。我试图修复你的代码，而不是给你一个不同的解决方案。这没有跳跃。

var $window = $(window),
        $el = $('nav'),
        elTop = $el.offset().top;

      $window.scroll(function() {
        $el.toggleClass('navbar-fixed-top', $window.scrollTop() > elTop);
      });

Navbar没有保持固定

1 个答案: