固定的CSS位置不会出现在移动设备上

Question

我有一个像这个css的元素:

element.style {
    background-image: url(image.jpg);
}
.panel-image {
    background-position: center center;
    background-repeat: no-repeat;
    -webkit-background-size: cover;
    background-size: cover;
    position: relative;
}

我现在正试图使它成为一个固定的位置,所以当我尝试执行以下操作时:

.panel-image {
    background-position: center center;
    background-repeat: no-repeat;
    -webkit-background-size: cover;
    background-size: cover;
    position: fixed;
    width: 100%;
    height: 200px;
}

该元素不再出现在页面上.

有一个元素包围这个元素:

.twentyseventeen-panel {
    overflow: hidden;
    position: relative;
}

这是html:

<article id="panel1" class="twentyseventeen-panel  post-47 page type-page status-publish has-post-thumbnail hentry">


        <div class="panel-image" style="background-image: url(https://2017.wordpress.net/wp-content/uploads/2016/10/pexels-photo-30724-2000x1200.jpg);">
            <div class="panel-image-prop" style="padding-top: 60%"></div>
        </div><!-- .panel-image -->


    <div class="panel-content">
        <div class="wrap">
            <header class="entry-header">
                <h2 class="entry-title">Our Drinks</h2>

            </header><!-- .entry-header -->

            <div class="entry-content">
                <h2>Coffee and Espresso</h2>
<p><strong>Drip Coffee</strong>&nbsp;$2.50</p>
<p><strong>Espresso Shots</strong> $3.00</p>
<p><strong>Americano</strong>&nbsp;$4.50</p>
<p><strong>Cappuccino</strong>&nbsp;$4.50</p>
<p><strong>Macchiato</strong>&nbsp;$4.50</p>
<p><strong>Cortado</strong>&nbsp;$4.50</p>
<p><strong>Flat White</strong>&nbsp;$5.00</p>
<p><strong>Latte</strong>&nbsp;$4.50<br>
<em>hot or iced</em></p>
<p><strong>Mocha</strong>&nbsp;$4.50<br>
<em>hot or iced</em></p>
<p><strong>Cold Brew</strong> $4.00<br>
<em>regular or nitro</em></p>
<h2>Other Drinks</h2>
<p><strong>Chai</strong><strong>&nbsp; </strong>$4.50</p>
<p><strong>Iced Tea&nbsp;&nbsp;</strong>$3.50<br>
<em>green, black, or white</em></p>
<p><strong>Hot Tea</strong><strong>&nbsp;&nbsp;</strong>$3.00<br>
<em>english breakfast, ceylon, green, white, chamomile, rooibos, peach</em></p>
<p><strong>Flavored Sodas</strong><strong>&nbsp; </strong>$4.00<br>
<em>raspberry, blueberry, peach, mango, vanilla, mint</em></p>
            </div><!-- .entry-content -->


        </div><!-- .wrap -->
    </div><!-- .panel-content -->

</article>

我的问题是,我如何获得要修复背景图像的元素.

这是一个示例站点:

http://www.grogenex.com/

Answer 1

新答案：

如果你将 CSS 添加到图像中。它可以创建您需要的视差效果！

background-attachment: fixed;
position: fixed !important;
object-fit: cover;
height:100%;

image它应该像这样插入到元素中。

<img src="http://www.grogenex.com/wp-content/uploads/2017/07/cropped-canabis.jpg" width="2000" height="1200" alt="Grogenex" srcset="http://www.grogenex.com/wp-content/uploads/2017/07/cropped-canabis.jpg 2000w, http://www.grogenex.com/wp-content/uploads/2017/07/cropped-canabis-300x180.jpg 300w, http://www.grogenex.com/wp-content/uploads/2017/07/cropped-canabis-768x461.jpg 768w, http://www.grogenex.com/wp-content/uploads/2017/07/cropped-canabis-1024x614.jpg 1024w" sizes="100vw" style="
    background-attachment: fixed;
    position: fixed !important;
    object-fit: cover;
    height:100%;
">

此外，如果您将其添加到它，.panel-image它也会为移动设备创建相同的视差！

.panel-image{
    background-attachment: fixed !important;
}

如果这能解决您的问题，请告诉我！

旧答案：

在您在问题中提供的初始 CSS 中，图像已经修复。你想实现这样的目标吗？

background-attachment: fixed;
position: fixed !important;
object-fit: cover;
height:100%;

<img src="http://www.grogenex.com/wp-content/uploads/2017/07/cropped-canabis.jpg" width="2000" height="1200" alt="Grogenex" srcset="http://www.grogenex.com/wp-content/uploads/2017/07/cropped-canabis.jpg 2000w, http://www.grogenex.com/wp-content/uploads/2017/07/cropped-canabis-300x180.jpg 300w, http://www.grogenex.com/wp-content/uploads/2017/07/cropped-canabis-768x461.jpg 768w, http://www.grogenex.com/wp-content/uploads/2017/07/cropped-canabis-1024x614.jpg 1024w" sizes="100vw" style="
    background-attachment: fixed;
    position: fixed !important;
    object-fit: cover;
    height:100%;
">