绝对位置的z索引比固定位置大 [英] Position absolute has greater z-index than position fixed

问题描述

我有一个与相对位置有关的元素的问题.问题是我有一个标题，标题的位置是固定的，内容是相对的.如果我向下滚动内容，则该元素将放在标题的前面.我尝试使用z-index，但无法正常工作.我在标题上放了 z-index:999 .

在这里您可以看到我的

修正示例

标头样式存在问题，有两个冒号 :: 用于处理z-index属性值.

  .header {宽度:960px；背景:#43484A；高度:80px;位置:固定；顶:0;z索引:9999；/*删除了多余的内容:这里*/} 

固定示例 http://jsfiddle.net/kUW66/2/

I have a poblem with an element that is positioned relative. The problem is that I have a header with position fixed and content which is positioned relative. If I scroll down the content the element is put in front of the header. I tried with z-index but I just can't get it to work. I have put z-index:999 on header.

Here you can see my jsFiddle

Here is a picture:

解决方案

The z-index on the relative positioned element should be lower than the z-index on the fixed position element. Here is a quick example:

HTML

<div id="fixed">Fixed Position</div>
<div id="relative">Relative Position</div>

CSS

body{
    height: 3000px;
}

#fixed{
    top: 0;
    height; 100px;
    background: green;
    width: 100%;
    position: fixed;
    z-index: 2;
}

#relative{
    position: relative;
    top: 100px;
    left: 50px;
    height: 100px;
    width: 100px;
    background: red;
    z-index: 1;
}

Working Example: http://jsfiddle.net/XZ4tM/1/

Fixing Your Example

The header styling has an issue, there are two colons :: proceeding the z-index properties value.

  .header{
        width:960px;
        background: #43484A;
        height:80px;
        position: fixed;
        top:0;
        z-index: 9999; /* Removed extra : here */
   }

Fixed Example http://jsfiddle.net/kUW66/2/

这篇关于绝对位置的z索引比固定位置大的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！