0

大家好，我在滚动时无法保持原位，基本上使其“固定”。我已将 CSS 设置为固定，如下所示，但当我滚动时标题仍然消失。

网页

 <title>Final Test</title>

  <meta name="viewport" content="width=device-width, initial-scale=1.0" />

  <script>
    window.open    = function(){};
    window.print   = function(){};
    // Support hover state for mobile.
    if (false) {
      window.ontouchstart = function(){};
    }
  </script>


<body>


**<div class="fixed">   
  <h1>Packit<br>

    <style>
  .col-group {
  overflow: hidden;
}
.col-group > div {
  padding: 1em;
}

@media screen and (min-width: 44em) {
  .col-group > div {
    float: left;
    width: 50%;
  }
  .col-group > div:nth-child(odd) {
    clear: left;
  }
}

@media screen and (min-width: 50em) {
  .col-group > div {
    float: left;
    width: 33.3333333%;
  }
  .col-group > div:nth-child(3n+1) {
    clear: left;
  }
  .col-group > div:nth-child(odd) {
    clear: none;
  }
}

@media screen and (min-width: 70em) {
  .col-group > div {
    width: 20%;
  }
  .col-group > div:nth-child(odd), .col-group > div:nth-child(3n+1) {
    clear: none;
  }
}body h1 {
    font-size: 12em;
}
  body h1 {
    font-size: 3em;
}
  body h1 {
    font-size: 16em;
}
  body h1 {
    font-size: 16px;
}
  body h1 {
    font-size: 12px;
}
  </style>

  <link href="../Documents/Unnamed Site 2/stylesheet2.css" rel="stylesheet" type="text/css">

Hi there. We are here to help.</h1> 
</div>**

CSS 页面

/*
colors
red: #e51837; rgb(229,24,55)
gray: #808080;
*/

/************Reset**************/
* { 
    -moz-box-sizing: border-box; 
    -webkit-box-sizing: border-box; 
    box-sizing: border-box; 
}
html, body, div, object, iframe, fieldset { 
    margin: 0; 
    padding: 0; 
    border: 0;
} 

input, select
{
    width: 120px;
}

ol, ul { 
    list-style: none;
    margin: 0;
    padding: 0;
} 
table { 
    border-collapse: collapse; 
    border-spacing: 0; 
}
header, footer, nav, section, article, hgroup, figure {
    display: block; 
}
legend {
    display: none;
}
/************End Reset**************/

/************Global**************/
.fixed
{   position:fixed;
    top:0;
    left:0;
    width:100%;
    margin:0 auto;
}

.form
{   position:fixed;
    margin: auto;
    width: auto;
    line-height: 1;
}

body {
    background: #fff;
    color: #000;
    font: 100%/1.4 "HelveticaNeue", "Helvetica", "Arial", sans-serif;
    padding: 0;
    -webkit-text-size-adjust: none;
}
a {
    color: #808080;
    text-decoration: none;
}
a:hover, a:focus {
    color: #e51837;
}
p {
    margin: 0 0 1em;
}
img, object, video {
    max-width: 100%;
    border: 0;
}
a img {
    border: 0;
    outline: 0;
}
h1 {

    font-size: 3em;
    line-height: 1;
    letter-spacing: -0.02em;
    margin-bottom: 0.2em;

}
h2 {
    font-size: 2em;
    line-height: 1.1;
    margin-bottom: 0.2em;
}
h3 {
    font-weight: normal;
    line-height: 1.1;
    padding-bottom: 0.4em;
    border-bottom: 1px solid #ccc;
}
h1 a, h2 a, h3 a {
    display: block;
    color: #000;
}
h1 a:hover, h2 a:hover, h3 a:hover {
    color: #e51837;
}
blockquote {
    border-left: 0.5em solid #ddd;
    padding-left: 1em;
    margin-left: 1em;
}
small {
    color: #e51837;
}
input[type=search] {
    -webkit-appearance: none;
    border-radius: 0;
}
::-webkit-input-placeholder {
    color: #808080;
}
:-moz-placeholder {  
    color: #808080;
}
/************End Global**************/

/************Classes**************/
.inactive {
    color: #ddd;
}
/************End Classes**************/

/************Structure**************/
.container {
    max-width: 70em;
    margin: 0 auto;
    padding: 0 1em;
    overflow: hidden;
}
div[role=main] {
    padding-bottom: 1em;
}

/*Footer*/
footer[role=contentinfo] {
    color: #fff;
    background: #000;
    margin: 0 -1em;
    position: fixed;
    z-index: 2;
}
footer[role=contentinfo] > div {

    max-width: 70em;
    padding: 0 1em;
    margin: 0 auto;
    overflow: hidden;
}
footer[role=contentinfo] p {
    margin: 0;
}
footer[role=contentinfo] .nav li a {
    display: block;
    border-bottom: 1px solid #808080;
    padding: 1em;
    margin: 0 -1em;
}
footer[role=contentinfo] a {
    display: inline-block;
    padding: 0.5em 0;
}
footer[role=contentinfo] a.nav-home {
    color: #fff;
}
footer[role=contentinfo] .f-rga {
    padding: 0.6em 0;
}
footer[role=contentinfo] img {
    max-width: 4.4em;
    display: inline-block;
    margin-bottom: -0.22em;
}
/*End Footer*/

/*Grid*/
.grid {
    margin: 0 -1em;
    overflow: hidden;
}
.grid:target {
    -webkit-animation: fadeout 5s 1 ease-out;
    -moz-animation: fadeout 5s 1 ease-out; 
    -o-animation: fadeout 5s 1 ease-out;
    animation: fadeout 5s 1 ease-out; 
}
.grid > h2 {
    margin-left: 0.45em;
}
.grid > section {
    padding: 1em 1em 0.5em;
}
.grid > section:target {
    -webkit-animation: fadeout 5s 1 ease-out;
    -moz-animation: fadeout 5s 1 ease-out; 
    -o-animation: fadeout 5s 1 ease-out;
    animation: fadeout 5s 1 ease-out; 
}
.grid ul {
    overflow: hidden;
}
.grid ul li {
    margin-bottom: 0.3em;
}
.featured:after {
    content: "*";
    color: #e51837;
}

/*Fluid*/
.fluid {
    display: block;
    margin: 0 auto;
    max-width: 40em;
}

/*Homepage*/
.home h1 {
    margin-bottom: 0.2em;
}
.intro {
    font-size: 1.8em;
    line-height: 1.2;
    margin: 0 auto;
}
.intro a:hover ,.intro a:focus {
    color: #000;
    border-bottom-color: #000;
}

.ani {
    position: relative;
    height: 15em;
    margin: 1em 0 0;
    width: 100%;
    z-index: 0;
}
.ani div {
    width: 100%;
}
.ani div b {
    display: block;
    position: absolute;
    top: 5%;
    right: 5%;
    bottom: 5%;
    left: 5%;
    background: rgba(229,24,55,0.22);
}


/*Patterns*/
.mod {
    padding: 1em;
}
.pattern {
    background: #f7f7f7;
    border-bottom: 1px solid #808080;
    margin-bottom: 1em;
    overflow: hidden;
}
.pattern-description h1 {
    font-size: 3.4em;
    margin-bottom: 0.5em;
}
.pattern-description {
    max-width: 40em;
    margin: 0 auto;
}
.pattern-description ul, .pattern-description ol {
    margin-bottom: 2em;
}
.pattern-description li {
    margin-bottom: 1em;
}


/*Blog*/
/*Blog Header*/
.blog .container {
    max-width: 62em;
}
.blog header[role=banner] {
    overflow: hidden;
    margin-bottom: 2em;
    padding: 2em 0 1em;
    border-bottom: 1px solid #000;
}
.blog-logo {
    font-weight: normal;
    font-size: 1.2em;
    margin: 0 0 1em;
}
.blog-logo img {
    width: 3.3em;
}
.blog-logo a {
    color: #000;
}
.search-form {
    width: 100%;
    margin-bottom: 1em;
}
.search-field {
    width: 100%;
    padding: 0.5em 0;
    border: 0;
    border-bottom: 1px solid #808080;
    outline: none;
}
.search-field:focus {
    background: #e51837;
    color: #fff;
}
.search-field:focus::-webkit-input-placeholder {
   color: #fff;
}

.search-field:focus :-moz-placeholder {  
   color: #fff; 
}

.blog .nav {
    clear: both;
}
.blog .nav a {
    display: block;
    font-weight: bold;
    color: #000;
}
.blog .nav a:hover {
    color: #e51837;
}

/*Posts*/
.posts ol > li {
    padding-bottom: 1em;
    border-bottom: 1px solid #ccc;
    margin-bottom: 1em;
    overflow: hidden;
} 
.posts h2 {
    font-size: 1.4em;
    margin: 0.28em 0 0.1em;
    font-weight: normal;
}
.posts h2 a {
    color: #000;
}
.posts h2 a:hover, .posts h2 a:focus {
    color: #e51837;
}
.permalink {
    display: block;
    font-size: 0.8em;
    margin-bottom: 1.2em;
}
.post-body a {
    border-bottom: 1px solid #ccc;
}
.posts blockquote {
    margin: 0 0 1em;
    color: #666;
    border-left: 0.25em solid #ccc;
    padding-left: 1em;
}
.tags {
    float: left;
}
.tags li {
    display: inline-block;
    font-size: 0.8em;
    margin-right: 0.5em;
}

.posts ol > li .tags a, .permalink {
    color: #ccc;
    -webkit-transition: color 0.3s ease-out;  
     -moz-transition: color 0.3s ease-out;  
      -ms-transition: color 0.3s ease-out;  
       -o-transition: color 0.3s ease-out;  
          transition: color 0.3s ease-out;
}
.posts ol > li:hover .tags a, .posts ol > li:hover .permalink {
    color: #808080;
}
.blog-nav {
    text-align: center;
    overflow: hidden;
    padding: 1em 0;
}
.posts .blog-nav a {
    border: 0;
}
.nav-next {
    float: right;
}
.nav-prev {
    float: left;
}

/* Sidebar */
.sidebar {
    font-size: 0.8em;
    padding-bottom: 1.4em;
}
.sidebar div {
    margin-bottom: 2em;
}
.sidebar h3 {
    font-weight: bold;
    font-size: 0.9em;
    line-height: 1;
    border-bottom: 1px solid #000;
}
.sidebar a {
    color: #808080;
}
.sidebar a:hover, .sidebar a:focus {
    color: #e51837;
}
.social-links {
    overflow: hidden;
}
.social-links li {
    float: left;
    margin-right: 1.2em;
}
.social-links li a {
    display: block;
    height: 17px;
    width: 16px;
    text-indent: -99999em;
    background: url(images/sprite_social.png) no-repeat;
}
.social-links li a.s-fb {
    background-position: -0px -76px;
}
.social-links li a.s-fb:hover {
    background-position: -16px -76px;
}
.social-links li a.s-twitter {
    background-position: -0px -37px;
}
.social-links li a.s-twitter:hover {
    background-position: -16px -37px;
}
.social-links li a.s-linkedin {
    background-position: -0px -113px;
}
.social-links li a.s-linkedin:hover {
    background-position: -16px -113px;
}
.social-links li a.s-rss {
    background-position: -0px -0px;
}
.social-links li a.s-rss:hover {
    background-position: -16px -0px;
}



.top {
    clear: both;
    display: block;
    padding: 1em 0;
}
.top:before {
    content: '▲';
}

/******Media Queries*******/

/* Medium Screens*/
@media all and (min-width: 35em) {
    .blog-logo {
        float: left;
        font-size: 2em;
        margin: 0 0 1em;
    }
    .blog-logo img {
        width: auto;
    }
}
@media all and (min-width:40em) {
    h1 {
        font-size: 5.6em;
    }
    .container {
        padding-bottom: 4em;
    }
    footer[role=contentinfo] {
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        margin: 0;
    }
    footer[role=contentinfo] .nav {
        float: left;
    }
    footer[role=contentinfo] .nav li {
        display: inline-block;
        margin-right: 0.8em;
    }
    footer[role=contentinfo] .nav li a {
        border: 0;
    }
    footer[role=contentinfo] .f-rga {
        float: right;
    }
    .grid ul li {
        width: 50%;
        float: left;
    }
    .grid ul li:nth-child(odd) {
        padding-right: 1em;
        clear: left;
    }
    .ani {
        position: absolute;
        top: 0;
        right: 0;
        bottom: 4em;
        left: 0;
        width: 100%;
        height: 90%;
        margin: 0;
        z-index: 0;
    }
    .home {
        position: absolute;
        top: 0;
        right: 0;
        bottom: 5em;
        left: 0;
        z-index: 1;
        width: 100%;
        height: 90%;
        display: table;
        text-align: center;
        color: #fff;
        color: rgba(255,255,255,0.7);
    }
    .home > div {
        display: table-cell;
        vertical-align: middle;
    }
    .home .intro a {
        color: #fff;
        color: rgba(255,255,255,0.8);
        border-bottom: 1px solid rgba(255,255,255,0.8);
    }
    .home .intro a:hover, .home .intro a:focus {
        color: #000;
        border-bottom-color: #000;
    }


    /*Blog*/

    .search-form {
        float: right;
        width: 30%;
        max-width: 16em;
        padding-left: 0.8em;
        margin-top: 0.4em;
    }

    .posts {
        float: left;
        width: 64%;
    }
    .sidebar {
        float: right;
        width: 30%;
        max-width: 21em;
        margin: 0 0 1em;
        padding-left: 0.8em;
    }
}


/* Large Screens */
@media all and (min-width: 54em) {
    h1 {
        font-size: 6.4em;
    }
    .grid > section {
        float: left;
        width: 33.3333333%;
    }
    .grid > section:nth-of-type(3n+1) {
        clear: left;
    }
    .grid ul li {
        width: auto;
        float: none;
    }
    .grid ul li:nth-child(odd) {
        padding-right: 0;
    }
}   


/* CSS Animations */
@-webkit-keyframes fadeout {
  0%   { background: #fff; }
  10%   { background: #eee; }
  100% { background: #fff; }
}
@-moz-keyframes fadeout {
  0%   { background: #fff; }
  10%   { background: #eee; }
  100% { background: #fff; }
}
@-o-keyframes fadeout {
  0%   { background: #fff; }
  10%   { background: #eee; }
  100% { background: #fff; }
}
@keyframes fadeout {
  0%   { background: #fff; }
  10%   { background: #eee; }
  100% { background: #fff; }
}
4

3 回答 3

2

你的问题是你的 HTML 代码的格式，所以像这样改进它：

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<link href="../Documents/Unnamed Site 2/stylesheet2.css" rel="stylesheet" type="text/css">

<script>
window.open    = function(){};
window.print   = function(){};
// Support hover state for mobile.
if (false) {
  window.ontouchstart = function(){};
}
</script>
<style>
   .col-group {
       overflow: hidden;
   }
   .col-group > div {
       padding: 1em;
   }
    // ... AND SO ON... // 

</style>
<title>JS Bin</title>
</head>

<body>
   <div class="fixed">   
       <h1>Packit</h1><br> // YOU DON'T CLOSED HERE THE H1 TAG
   </div>
</body>
</html>

为什么不把你的 css 样式放在一个外部文件而不是嵌入样式表中呢？

于 2013-09-14T01:10:32.250 回答
1

您遇到此问题的原因是您的 HTML 代码格式不正确。您在正文部分有 CSS 样式表“Stylesheet2.css”，不幸的是，外部样式表需要链接到头部，否则它们不起作用。不能这样说，但是通常的做法也将放在页面的部分中。

于 2013-09-14T01:15:03.340 回答
0

我在 Chrome 上遇到了同样的问题，这似乎是当页面内部发生太多事情时发生的错误，我能够通过将以下转换代码添加到固定位置元素来修复它，（transform: translateZ(0);-webkit-transform: translateZ(0);）强制浏览器使用硬件加速来访问设备的图形处理单元 (GPU) 以使像素飞起来。另一方面，Web 应用程序在浏览器的上下文中运行，这使软件可以完成大部分（如果不是全部）渲染，从而减少了转换的动力。但是 Web 一直在迎头赶上，现在大多数浏览器供应商都通过特定的 CSS 规则提供图形硬件加速。

使用-webkit-transform: translate3d(0,0,0); 将为 CSS 过渡启动 GPU，使它们更平滑（更高的 FPS）。

注意： translate3d(0,0,0) 对您看到的内容没有任何作用。它在 x、y 和 z 轴上将对象移动 0px。这只是一种强制硬件加速的技术。

.fixed {
    position: fixed;
    background: white;
    border-bottom: 2px solid #eaeaea;
    width: 100%;
    left: 0;
    top: 0;
    z-index: 9994;
    height: 80px;
    /* MAGIC HAPPENS HERE */
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
}
于 2014-09-18T20:49:27.603 回答