Question

您好我最近使用bootstrap 4 offcanvas模板来构建我的网站

http://v4-alpha.getbootstrap.com/examples/offcanvas/#

现在我想让我的侧边栏跟随用户滚动但引导程序删除了词缀类并建议使用css位置粘贴。我试图这样做并瞄准侧边栏，但它搞砸了布局。以.nav为目标也不起作用

HTML

<div class="container-fluid header navbar-fixed-top">        
    <div class="row">
           <div class="hidden-md-up col-xs-2">
                <button type="button" class="btn btn-secondary" data-toggle="offcanvas"><i class="fa fa-bars"></i></button>
           </div>

           <div class="col-md-12 col-sm-8 col-xs-8">                        
                <img src="images/logo.gif" class="img-fluid center-block" alt="emblem">                        
           </div>
    </div>   
</div><!-- /HEADER -->

<div class="container-fluid">
    <div class="row row-offcanvas row-offcanvas-left">

        <div class="col-md-2 col-sm-2 col-xs-4 sidebar-offcanvas" id="sidebar">
            <ul class="nav nav-stacked">
                <li class="nav-item">
                    <a class="nav-link" href="#home">Home <span class="sr-only">(current)</span></a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#about">About Us</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#area">Locations</a>     
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#deals">Deals</a>     
                </li>                   
                <li class="nav-item">
                    <a class="nav-link" href="#contact">Contact Us</a>
                </li>
            </ul>
        </div><!-- /Navigation -->


            <section id="home">
                <div class="row">

                    <div class="col-md-6 col-md-offset-5 col-sm-8 col-sm-offset-2 col-xs-10 col-xs-offset-1">
                        <img src="images/mazda2.gif" alt="Mazda2" class="img-fluid center-block">
                    </div>

                    <div class="col-md-6 col-md-offset-5 col-xs-12 text-xs-center">                        
                        <h3>Perth, Western Australia</h3>                           
                    </div>

                </div>
            </section><!-- HOME -->

            <section id="about">
                <div class="about-me">
                    <h3>About Us</h3>

                </div>
            </section><!-- ABOUT -->

    </div><!--ROW -->       
</div><!-- CONTAINER-FLUID -->

CSS

 /*
 * Style tweaks
 * --------------------------------------------------
 */
html,
body {
  overflow-x: hidden; /* Prevent scroll on narrow devices */
}
body {
  padding-top: 7em;
  position: relative;
}

/*
 * Off Canvas
 * --------------------------------------------------
 */
@media screen and (max-width: 767px) {
  .row-offcanvas {
    position: relative;
    -webkit-transition: all .25s ease-out;
         -o-transition: all .25s ease-out;
            transition: all .25s ease-out;
  }

   .row-offcanvas-left {
    left: 0;
  }

  .row-offcanvas-right {
    right: 0;
  }

  .row-offcanvas-left
  .sidebar-offcanvas {
  left: -33%; /* 4 columns */
  }

  .row-offcanvas-right
  .sidebar-offcanvas {
    right: -33%; /* 4 columns */
  }

  .row-offcanvas-left.active {
     left: 33%; /* 4 columns */
   }

   .row-offcanvas-right.active {
     right: 33%; /* 4 columns */
   }

   .sidebar-offcanvas {
    position: absolute;
    top: 0;
    width: 33%; /* 4 columns */

  }
}

/*
  * Custom Style
  * --------------------------------------------------
  */

  #sidebar {
    background-color: white;
    position:absolute;
    height:100vh;
 }

  .header {
     background-color: #232323;
 }

 .btn-secondary {
     background-color: #232323;
     border-color: #232323;
     margin-top:0.3em;
 }

 /*
  * HOME
  */

 #home {
   background-color: #434343;
   height: 100vh;
   width: 100vw;
 }

这可能与我的侧边栏画布和侧边栏位置有关。但没有mysidebar位置绝对我的部分内容被推下来。我尝试使用col-x-x类来尝试它，但没有去:(

Answer 1

我认为你应该使用：

@media screen and (min-width: 768px) {
  .sidebar-offcanvas .nav-stacked {
   position: fixed;
   top: 8em;
   width: 33%;
  } 
}

详情了解position: fixed：Affix is not working in Bootstrap 4 alpha

offcanvas-sidebar bootstrap 4粘边栏

1 个答案: