1.样式
<style>
.container {
z-index:101;
position:fixed;
width:100%;
margin-right:0px;
margin-left:0px;
text-align:center;
}
.bigimg {
z-index:100;
position: fixed;
left:0;
top:0;
width:100%;
}
</style>
2.图片和遮罩层文章来源:https://www.toymoban.com/news/detail-508748.html
<div class="main">
<img src="mango.jpg"/>
</div>
<div class="bigimg"></div><!--遮罩层-->
3.效果实现代码文章来源地址https://www.toymoban.com/news/detail-508748.html
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script>
$(document).ready(function () {
var imgObj = $('.main img');//点击的图片
$.each(imgObj,function(){
$(this).click(function(){
var container = $('<div class=container></div>');
var myImg = $(this);
coverLayer(1);
with(container){
appendTo("body");
var windowWidth = $(window).width();
var windowHeight = $(window).height();
//获取原图宽度、高度
var originalImg = new Image();
originalImg.src =myImg.attr("src");
var myImgWidth= originalImg.width;
var myImgHeight = originalImg.height;
if(myImgWidth < windowWidth){
if(myImgHeight < windowHeight){
var topHeight=(windowHeight-myImgHeight)/2;
if(topHeight>35){
topHeight=topHeight-35;
css('top',topHeight);
}else{
css('top',0);
}
html('<img src=' + myImg.attr('src') + ' border=0 />');
}else{
css('top',0);
html('<img src=' + myImg.attr('src') + ' height='+windowHeight+' border=0 />');
}
}else{
var myImgChangeHeight=(myImgHeight*windowWidth)/myImgWidth;
if(myImgChangeHeight < windowHeight){
var topHeight = (windowHeight - myImgChangeHeight)/2;
if(topHeight>35){
topHeight=topHeight-35;
css('top',topHeight);
}else{
css('top',0);
}
html('<img src=' + myImg.attr('src') + ' width='+windowWidth+' border=0 />');
}else{
css('top',0);
html('<img src=' + myImg.attr('src') + ' width='+windowWidth+'; height='+windowHeight+' border=0 />');
}
}
}
container.click(function(){
$(this).remove();
coverLayer(0);
});
});
});
//使用禁用蒙层效果
function coverLayer(tag){
with($('.bigimg')){
if(tag){
css('height',$(document).height());
css('display','block');
css('opacity',1);
css("background-color","#fff");
css("background-color","rgba(0,0,0,0.6)" ); //蒙层透明度
}else{
css('display','none');
}
}
}
});
</script>
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