防止固定位置的背景在单击事件上跳到页面顶部? [英] Prevent a Fixed Positioned Background from Jumping to the Top of a Page on a Click Event?
本文介绍了防止固定位置的背景在单击事件上跳到页面顶部?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我已经为一个页面上的多个图像开发了一个图像/灯箱查看器.打开查看器后，它将向<body>标签添加.no-scroll类.除了其他所有功能均正常运行之外，我试图弄清楚为什么.no-scroll类每次通过.click()事件提示时都跳至页面顶部.
I have developed an image/lightbox viewer for multiple images on a page. When the viewer is opened, it adds a .no-scroll class to the <body> tag. Aside from everything else functioning properly, I'm trying to figure out why the .no-scroll class jumps to the top of the page each time it is prompted with a .click() event.
我已经读到这可能与position: fixed;的应用有关，但是由于在这种情况下我需要固定位置，因此似乎没有很多解决方法.我什至尝试使用position: absolute;代替，但这没有产生我想要的结果，因为它没有阻止主体背景在移动设备上垂直滚动(而position: fixed;能够做到).
I've read that this may have something to do with position: fixed; being applied, but since I need the position to be fixed in this case, there doesn't appear to be a ton of workarounds. I've even tried applying position: absolute; instead, but this didn't produce the result I wanted because it didn't prevent the body background from vertically scrolling on mobile devices, (whereas position: fixed; was able to).
下面的代码片段应进一步说明当前的问题:
Here's a snippet that should further exemplify the issue at hand:
$('.pic > img').click(function() {
var srcToCopy = $(this).attr('src');
$('body').find('.imgsrc').attr('src', srcToCopy);
$('body').addClass('no-scroll');
$('#view').addClass("target");
});
$('#customlightbox-controls').on('click', function() {
$('body').removeClass('no-scroll');
$('#view').removeClass("target");
});
body {
background: url('http://2.bp.blogspot.com/-FFEo8jRHyI8/TtEKfbM9UTI/AAAAAAAAADk/Nj1P4BnDyro/s1600/Grass+00+seamless.jpg');
background-size: cover;
margin: 0;
padding: 0;
border: 0;
height: auto;
width: 100%;
}
body.no-scroll {
overflow: hidden;
height: auto;
width: 100%;
}
.pic,
#imgsrc {
display: inline-block;
cursor: pointer;
}
img {
width: 150px
}
a {
display: inline-block;
line-height: 0;
}
.container {
text-align: center;
display: block;
width: 100%;
line-height: 0;
}
.customlightbox {
top: 0%;
bottom: 0%;
box-sizing: border-box;
position: fixed;
left: 0;
right: 0;
background: rgba(0, 0, 0, 0.7);
z-index: -5;
opacity: 0;
}
.customlightbox-imgwrap {
width: 100%;
height: 100%;
padding: 20px;
box-sizing: border-box;
position: relative;
text-align: center;
}
.customlightbox img {
width: auto;
margin: auto;
max-width: 100%;
max-height: 100%;
opacity: 0;
position: relative;
top: 50%;
transform: translateY(-50%);
}
#customlightbox-controls {
cursor: pointer;
box-sizing: border-box;
position: fixed;
height: 50px;
width: 50px;
top: -50px;
right: -3px;
z-index: 5;
border-left: 2px solid white;
border-bottom: 2px solid white;
opacity: .7;
}
#close-customlightbox {
display: block;
position: absolute;
overflow: hidden;
height: 30px;
width: 30px;
right: 10px;
top: 10px;
-webkit-transform: rotate(45deg);
-moz-transform: rotate(45deg);
-ms-transform: rotate(45deg);
-o-transform: rotate(45deg);
transform: rotate(45deg);
}
#close-customlightbox:before {
content: "";
display: block;
position: absolute;
height: 0px;
width: 2px;
left: 14px;
top: 0;
background: white;
border-radius: 2px;
}
#close-customlightbox:after {
content: "";
display: block;
position: absolute;
width: 0px;
height: 2px;
top: 14px;
left: 0;
background: white;
border-radius: 2px;
}
.customlightbox.target {
z-index: 4;
opacity: 1;
display: inline-block;
}
.customlightbox.target img {
opacity: 1;
}
.customlightbox.target~#customlightbox-controls {
top: -3px;
}
.customlightbox.target~#customlightbox-controls #close-customlightbox:after {
width: 30px;
}
.customlightbox.target~#customlightbox-controls #close-customlightbox:before {
height: 30px;
}
.lb-animate {
-webkit-transition: 0.5s ease-in-out;
-moz-transition: 0.5s ease-in-out;
-ms-transition: 0.5s ease-in-out;
-o-transition: 0.5s ease-in-out;
transition: 0.5s ease-in-out;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!-- Lightbox Instance 1 -->
<div class="container">
<div class="pic">
<img src="https://syedimranrocks.files.wordpress.com/2012/09/flower01low1.png">
</div>
</div>
<!-- Lightbox Instance 2 -->
<div class="container">
<div class="pic">
<img src="http://downloadicons.net/sites/default/files/Rose-Coral-Icon-906534.png">
</div>
</div>
<!-- Lightbox Instance 3 -->
<div class="container">
<div class="pic">
<img src="https://images.vexels.com/media/users/3/136645/isolated/lists/54b1517db1906889a6971939de45d2a8-purple-sunflower-cartoon.png">
</div>
</div>
<!-- Lightbox Instance 4 -->
<div class="container">
<div class="pic">
<img src="http://i2.wp.com/lfisdelhi.com/wp-content/uploads/2016/05/Sunflower-icon.png">
</div>
</div>
<!-- Lightbox Instance 5 -->
<div class="container">
<div class="pic">
<img src="http://icongal.com/gallery/image/203372/birthday_flower_love_valentine_yellow_rose.png">
</div>
</div>
<!-- Lightbox Controls -->
<div class="customlightbox lb-animate" id="view">
<div class="customlightbox-imgwrap">
<img class="imgsrc" id="customlightbox-img" src="">
</div>
</div>
<div id="customlightbox-controls" class="lb-animate">
<a id="close-customlightbox" class="lb-animate"></a>
</div>
推荐答案
您只需删除position: fixed;
var $scrollTop = 0;
$('.pic > img').click(function () {
var $body = $('body');
$scrollTop = $(window).scrollTop();
$body.css('position', 'fixed');
$body.css('top', '-' + $scrollTop + 'px');
$body.css('background-position', '0 -' + $scrollTop + 'px');
var srcToCopy = $(this).attr('src');
$body.find('.imgsrc').attr('src', srcToCopy);
$body.addClass('no-scroll');
$('#view').addClass("target");
});
$('#customlightbox-controls').on('click', function () {
var $body = $('body');
$body.css('position', '');
$body.css('background-position', '');
$scrollTop = $(window).scrollTop($scrollTop);
$body.removeClass('no-scroll');
$('#view').removeClass("target");
});
body {
background: url('http://2.bp.blogspot.com/-FFEo8jRHyI8/TtEKfbM9UTI/AAAAAAAAADk/Nj1P4BnDyro/s1600/Grass+00+seamless.jpg');
background-size: cover;
margin: 0;
padding: 0;
border: 0;
height: 100%;
width: 100%;
}
body.no-scroll {
overflow: hidden;
height: auto;
width: 100%;
}
.pic,
#imgsrc {
display: inline-block;
cursor: pointer;
}
img {
width: 150px
}
a {
display: inline-block;
line-height: 0;
}
.container {
display: block;
width: 100%;
line-height: 0;
}
.customlightbox {
top: 0%;
bottom: 0%;
box-sizing: border-box;
position: fixed;
left: 0;
right: 0;
background: rgba(0, 0, 0, 0.7);
z-index: -5;
opacity: 0;
}
.customlightbox-imgwrap {
width: 100%;
height: 100%;
padding: 20px;
box-sizing: border-box;
position: relative;
text-align: center;
}
.customlightbox img {
width: auto;
margin: auto;
max-width: 100%;
max-height: 100%;
opacity: 0;
position: relative;
top: 50%;
transform: translateY(-50%);
}
#customlightbox-controls {
cursor: pointer;
box-sizing: border-box;
position: fixed;
height: 50px;
width: 50px;
top: -50px;
right: -3px;
z-index: 5;
border-left: 2px solid white;
border-bottom: 2px solid white;
opacity: .7;
}
#close-customlightbox {
display: block;
position: absolute;
overflow: hidden;
height: 30px;
width: 30px;
right: 10px;
top: 10px;
-webkit-transform: rotate(45deg);
-moz-transform: rotate(45deg);
-ms-transform: rotate(45deg);
-o-transform: rotate(45deg);
transform: rotate(45deg);
}
#close-customlightbox:before {
content: "";
display: block;
position: absolute;
height: 0px;
width: 2px;
left: 14px;
top: 0;
background: white;
border-radius: 2px;
}
#close-customlightbox:after {
content: "";
display: block;
position: absolute;
width: 0px;
height: 2px;
top: 14px;
left: 0;
background: white;
border-radius: 2px;
}
.customlightbox.target {
z-index: 4;
opacity: 1;
display: inline-block;
}
.customlightbox.target img {
opacity: 1;
}
.customlightbox.target ~ #customlightbox-controls {
top: -3px;
}
.customlightbox.target ~ #customlightbox-controls #close-customlightbox:after {
width: 30px;
}
.customlightbox.target ~ #customlightbox-controls #close-customlightbox:before {
height: 30px;
}
.lb-animate {
-webkit-transition: 0.5s ease-in-out;
-moz-transition: 0.5s ease-in-out;
-ms-transition: 0.5s ease-in-out;
-o-transition: 0.5s ease-in-out;
transition: 0.5s ease-in-out;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<!-- Lightbox Instance 1 -->
<div class="container">
<div class="pic">
<img src="https://syedimranrocks.files.wordpress.com/2012/09/flower01low1.png">
</div>
</div>
<!-- Lightbox Instance 2 -->
<div class="container">
<div class="pic">
<img src="http://downloadicons.net/sites/default/files/Rose-Coral-Icon-906534.png">
</div>
</div>
<!-- Lightbox Instance 3 -->
<div class="container">
<div class="pic">
<img src="https://images.vexels.com/media/users/3/136645/isolated/lists/54b1517db1906889a6971939de45d2a8-purple-sunflower-cartoon.png">
</div>
</div>
<!-- Lightbox Instance 4 -->
<div class="container">
<div class="pic">
<img src="http://i2.wp.com/lfisdelhi.com/wp-content/uploads/2016/05/Sunflower-icon.png">
</div>
</div>
<!-- Lightbox Instance 5 -->
<div class="container">
<div class="pic">
<img src="https://www.iconexperience.com/_img/v_collection_png/256x256/shadow/flower_blue.png">
</div>
</div>
<!-- Lightbox Controls -->
<div class="customlightbox lb-animate" id="view">
<div class="customlightbox-imgwrap">
<img class="imgsrc" id="customlightbox-img" src="">
</div>
</div>
<div id="customlightbox-controls" class="lb-animate">
<a id="close-customlightbox" class="lb-animate"></a>
</div>
以上是代码段的更新，希望对您有所帮助.
Above is an update of the snippet, I hope it finally helps you.
这篇关于防止固定位置的背景在单击事件上跳到页面顶部?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！
查看全文
