引导静态到固定导航栏在滚动时跳跃

Question

解决这个问题有点麻烦。 我有一个引导导航栏，当查看器滚动经过顶部的徽标时，它会从静态变为固定。一切正常，除了导航栏到达顶部时，它会跳下丢失前几行内容。谁能帮我解决这个问题？

html

<div id="logo">
    <div class="container">
        <div class="row">
            <div class="col-md-12">
                <h1>BIG,</h1>
                <h1>BIG LOGO!</h1>
            </div>
        </div>
    </div>
</div>    

<div id="nav-wrapper">
    <div id ="nav" class="navbar navbar-inverse navbar-static-top">
      <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>
          <a class="navbar-brand" href="#">Project name</a>
        </div>
        <div id="navbar" class="collapse navbar-collapse">
          <ul class="nav navbar-nav">
            <li class="active"><a href="#">Home</a></li>
            <li><a href="#about">About</a></li>
            <li><a href="#contact">Contact</a></li>
          </ul>
        </div><!--/.nav-collapse -->
      </div>
    </nav>
</div>    

css

#nav.affix {
    position: fixed;
    top: 0;
    width: 100%
}

java

$(function() {
    $('#nav-wrapper').height($("#nav").height());

    $('#nav').affix({
        offset: { top: $('#nav').offset().top }
    });
});

Check the JSFIDDLE example

谢谢大家！

Answer 1

$(function() {
    $('#nav-wrapper').height($("#nav").height());

    $('#nav').affix({
        offset: { top: $('#nav').offset().top }
    });

    $('#nav').on('affixed.bs.affix', function () {
        $('#content').css({"margin-top": "100px"})
    });
});

https://jsfiddle.net/yyLbgh98/1/