绝对＆＃39;绝对＆＃39;定位元素的行为就好像它们是固定的一样

时间：2018-05-24 14:13:21

标签： html css twitter-bootstrap fixed absolute

我试图熟悉Bootstrap，以便为作业建立一个响应式网站，并将我的设计基于this template。

我已经用我的网站的登陆屏幕替换了主体内容，其中涉及背景图像的旋转木马（带有字幕），以及页面中心的网站徽标。除了上面的文字，导航栏保持不变。

页面上的所有内容都包含在wrapper div中，其中包含侧栏的sidebar导航，以及页面内容其余部分的content div。内容div内部是bg div（包含轮播，包括其指示符和标题），hdr div（包含演示中显示的切换侧边栏按钮）和body div（包含徽标）。

理想情况下，我希望content div中的所有内容都表现得好像已经修复了＃39;我希望在滚动网页时，徽标，背景，旋转木马指示符，标题等保留在视口中。但是，我无法将位置设置为“固定”状态。因为它打破了导航栏。

目前，我还将bg div设置为绝对位置＆＃39;这样，当导航栏展开或折叠时，轮播字幕/指示符仍保留在页面的中心。因此，不仅我的元素不会像我希望的那样保持固定，当以较低分辨率查看网页时，页面底部还有大量的空白。

以下是我网站的代码。

＆＃13;
＆＃13; 
/*
    DEMO STYLE
*/
@import "https://fonts.googleapis.com/css?family=Poppins:300,400,500,600,700";

body {
    font-family: 'Poppins', sans-serif;
    background: #fafafa;
}

img {
    display: block;
    max-width: 100%;
    height: auto;
}

p {
    font-family: 'Poppins', sans-serif;
    font-size: 1.1em;
    font-weight: 300;
    line-height: 1.7em;
    color: #999;
}

a, a:hover, a:focus {
    color: inherit;
    text-decoration: none;
    transition: all 0.3s;
}

.navbar {
    padding: 15px 10px;
    background: #fff;
    border: none;
    border-radius: 0;
    margin-bottom: 40px;
    box-shadow: 1px 1px 3px rgba(0, 0, 0, 0.1);
}

.navbar-btn {
    box-shadow: none;
    outline: none !important;
    border: none;
}

.line {
    width: 100%;
    height: 1px;
    border-bottom: 1px dashed #ddd;
    margin: 40px 0;
}

i, span {
    display: inline-block;
}

.carousel-item {
  height: 100vh;
  min-height: 300px;
  background: no-repeat center center scroll;
  -webkit-background-size: cover;
  -moz-background-size: cover;
  -o-background-size: cover;
  background-size: cover;
}

.sticky {
  position: fixed;
  top: 0;
  width: 100%;
}

.sticky + .content {
  padding-top: 60px;
}

.carousel-caption h3 {
    font-size: 2.5vw;
}

.carousel-caption p {
    font-size: 1.5vw;
}

.carousel-indicators {
    position: absolute;
    margin-right: auto;
    margin-left: auto;
}

.carousel-caption {
    position: absolute;
    margin-right: auto;
    margin-left: auto;
}

/* ---------------------------------------------------
    SIDEBAR STYLE
----------------------------------------------------- */
.wrapper {
    display: flex;
    align-items: stretch;
}

#sidebar {
    min-width: 250px;
    max-width: 250px;
    background: #7386D5;
    color: #fff;
    transition: all 0.3s;
}

#sidebar.active {
    min-width: 80px;
    max-width: 80px;
    text-align: center;
}

#sidebar.active .sidebar-header h3, #sidebar.active .CTAs {
    display: none;
}

#sidebar.active .sidebar-header strong {
    display: block;
}

#sidebar ul li a {
    text-align: left;
}

#sidebar.active ul li a {
    padding: 20px 10px;
    text-align: center;
    font-size: 0.85em;
}

#sidebar.active ul li a i {
    margin-right:  0;
    display: block;
    font-size: 1.8em;
    margin-bottom: 5px;
}

#sidebar.active ul ul a {
    padding: 10px !important;
}

#sidebar.active a[aria-expanded="false"]::before, #sidebar.active a[aria-expanded="true"]::before {
    top: auto;
    bottom: 5px;
    right: 50%;
    -webkit-transform: translateX(50%);
    -ms-transform: translateX(50%);
    transform: translateX(50%);
}

#sidebar .sidebar-header {
    padding: 20px;
    background: #6d7fcc;
}

#sidebar .sidebar-header strong {
    display: none;
    font-size: 1.8em;
}

#sidebar ul.components {
    padding: 20px 0;
    border-bottom: 1px solid #47748b;
}

#sidebar ul li a {
    padding: 10px;
    font-size: 1.1em;
    display: block;
}
#sidebar ul li a:hover {
    color: #7386D5;
    background: #fff;
}
#sidebar ul li a i {
    margin-right: 10px;
}

#sidebar ul li.active > a, a[aria-expanded="true"] {
    color: #fff;
    background: #6d7fcc;
}


a[data-toggle="collapse"] {
    position: relative;
}

a[aria-expanded="false"]::before, a[aria-expanded="true"]::before {
    content: '\f078';
    display: block;
    position: absolute;
    right: 20px;
    font-family: FontAwesome;
    font-size: 0.6em;
}
a[aria-expanded="true"]::before {
    content: '\f077';
}


ul ul a {
    font-size: 0.9em !important;
    padding-left: 30px !important;
    background: #6d7fcc;
}

ul.CTAs {
    padding: 20px;
}

ul.CTAs a {
    text-align: center;
    font-size: 0.9em !important;
    display: block;
    border-radius: 5px;
    margin-bottom: 5px;
}

a.download {
    background: #fff;
    color: #7386D5;
}

a.article, a.article:hover {
    background: #6d7fcc !important;
    color: #fff !important;
}



/* ---------------------------------------------------
    CONTENT STYLE
----------------------------------------------------- */
#content {
    padding: 0;
    min-height: 100vh;
    transition: all 0.3s;
    position: relative;
    width: auto;
    height: auto;
}

#hdr {
    position: relative;
    z-index: 100;
    padding: 20px;
}

#bg {
    position: fixed;
    top: 0;
    left: 0;
    z-index: -100;
    width: 100%;
    height: 100%;
}

#body {
    height: 84%;
}

#logo {
    position: relative;
    width: 30%;
    height: 30%;
    top: 5%;
    margin-top: auto;
    margin-left: auto;
    margin-right: auto;
}

/* ---------------------------------------------------
    MEDIAQUERIES
----------------------------------------------------- */
@media (max-width: 768px) {
    #sidebar {
        min-width: 80px;
        max-width: 80px;
        text-align: center;
        margin-left: -80px !important ;
    }
    a[aria-expanded="false"]::before, a[aria-expanded="true"]::before {
        top: auto;
        bottom: 5px;
        right: 50%;
        -webkit-transform: translateX(50%);
        -ms-transform: translateX(50%);
        transform: translateX(50%);
    }
    #sidebar.active {
        margin-left: 0 !important;
    }

    #sidebar .sidebar-header h3, #sidebar .CTAs {
        display: none;
    }

    #sidebar .sidebar-header strong {
        display: block;
    }

    #sidebar ul li a {
        padding: 20px 10px;
    }

    #sidebar ul li a span {
        font-size: 0.85em;
    }
    #sidebar ul li a i {
        margin-right:  0;
        display: block;
    }

    #sidebar ul ul a {
        padding: 10px !important;
    }

    #sidebar ul li a i {
        font-size: 1.3em;
    }
    #sidebar {
        margin-left: 0;
    }
    #sidebarCollapse span {
        display: none;
    }
}
＆＃13; 
<!DOCTYPE html>

<html lang=en>

    <head>
        <meta charset="utf-8">
        <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.1.0/css/bootstrap.min.css" integrity="sha384-9gVQ4dYFwwWSjIDZnLEWnxCjeSWFphJiwGPXr1jddIhOegiu1FwO5qRGvFXOdJZ4" crossorigin="anonymous">
        <link rel=stylesheet type=text/css href="style.css">
        <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.0.10/css/all.css" integrity="sha384-+d0P83n9kaQMCwj8F4RJB66tzIwOKmrdb46+porD/OvrJ+37WqIM7UoBtwHO6Nlg" crossorigin="anonymous">
        <link href="https://maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css" rel="stylesheet">
        <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
        <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.0/umd/popper.min.js" integrity="sha384-cs/chFZiN24E4KMATLdqdvsezGxaGsi4hLGOzlXwp5UZB1LY//20VyM2taTB4QvJ" crossorigin="anonymous"></script>
        <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.1.0/js/bootstrap.min.js" integrity="sha384-uefMccjFJAIv6A+rW+L4AHf99KvxDjWSu1z9VI8SKNVmz4sk7buKt/6v9KI65qnm" crossorigin="anonymous"></script>
    </head>
    
    <body>



        <div class="wrapper">
            <!-- Sidebar Holder -->
            <nav id="sidebar">
                <div class="sidebar-header">
                    <h3>Website</h3>
                    <strong>W</strong>
                </div>

                <ul class="list-unstyled components">
                    <li class="active">
                        <a href="#homeSubmenu" data-toggle="collapse" aria-expanded="false">
                            <i class="fas fa-home"></i>
                            Home
                        </a>
                        <ul class="collapse list-unstyled" id="homeSubmenu">
                            <li><a href="#">Home 1</a></li>
                            <li><a href="#">Home 2</a></li>
                            <li><a href="#">Home 3</a></li>
                        </ul>
                    </li>
                    <li>
                        <a href="#">
                            <i class="fas fa-briefcase"></i>
                            About
                        </a>
                        <a href="#pageSubmenu" data-toggle="collapse" aria-expanded="false">
                            <i class="fas fa-newspaper"></i>
                            Pages
                        </a>
                        <ul class="collapse list-unstyled" id="pageSubmenu">
                            <li><a href="#">Page 1</a></li>
                            <li><a href="#">Page 2</a></li>
                            <li><a href="#">Page 3</a></li>
                        </ul>
                    </li>
                    <li>
                        <a href="#">
                            <i class="fas fa-link"></i>
                            Portfolio
                        </a>
                    </li>
                    <li>
                        <a href="#">
                            <i class="fas fa-paperclip"></i>
                            FAQ
                        </a>
                    </li>
                    <li>
                        <a href="#">
                            <i class="fas fa-at"></i>
                            Contact
                        </a>
                    </li>
                </ul>

                <ul class="list-unstyled CTAs">
                    <li><a href="https://bootstrapious.com/tutorial/files/sidebar.zip" class="download">Download source</a></li>
                    <li><a href="https://bootstrapious.com/p/bootstrap-sidebar" class="article">Back to article</a></li>
                </ul>
            </nav>
            
            <!-- Page Content Holder -->
            <div id="content" class="container-fluid" style="width:100%;overflow:hidden;">
                <div id="bg" style="width:100% !important;position:absolute;">
                    <div id="carouselExampleIndicators" class="carousel slide" data-ride="carousel">
                        <ol class="carousel-indicators">
                          <li data-target="#carouselExampleIndicators" data-slide-to="0" class="active"></li>
                          <li data-target="#carouselExampleIndicators" data-slide-to="1"></li>
                          <li data-target="#carouselExampleIndicators" data-slide-to="2"></li>
                        </ol>
                    <div class="carousel-inner" role="listbox">
                      <div class="carousel-item active" style="background-image: url('https://www.publicdomainpictures.net/pictures/170000/velka/red-purple-pattern-background.jpg');">
                        <div class="carousel-caption">
                          <h3>First Slide</h3>
                          <p>This is a description for the first slide.</p>
                        </div>
                      </div>
                      <div class="carousel-item" style="background-image: url('https://www.publicdomainpictures.net/pictures/140000/velka/cool-calm-green-water-background.jpg');">
                        <div class="carousel-caption">
                          <h3>Second Slide</h3>
                          <p>This is a description for the second slide.</p>
                        </div>
                      </div>
                      <div class="carousel-item" style="background-image: url('https://www.publicdomainpictures.net/pictures/170000/velka/blue-brush-strokes-background.jpg');">
                        <div class="carousel-caption">
                          <h3>Third Slide</h3>
                          <p>This is a description for the third slide.</p>
                        </div>
                      </div>
                    </div>
                  </div>
                </div>
                
                <div id="hdr">
                    <nav class="navbar navbar-default" style="background-color:rgba(0,0,0,0);">
                    <div class="container-fluid">

                        <div class="navbar-header">
                            <button type="button" id="sidebarCollapse" class="btn btn-info navbar-btn">
                                <i class="fas fa-align-left"></i>
                                <span>Toggle Sidebar</span>
                            </button>
                        </div>

                    </div>
                    </nav>
                </div>
                
                <div id="body" class="container-fluid">  
                    <img id="logo" src="https://upload.wikimedia.org/wikipedia/commons/a/ab/Logo_TV_2015.png">
                </div>
                
            </div>
        </div>

         <script type="text/javascript">
             $(document).ready(function () {
                 $('#sidebarCollapse').on('click', function () {
                     $('#sidebar').toggleClass('active');
                 });
             });
         </script>
    </body>
    
</html>
＆＃13;
＆＃13;
＆＃13;

我该怎么办？

0 个答案:

没有答案
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