Js或者jQuery实现点击图片出现蒙层并将图片放大在蒙层上------Sestid

小鱼儿 2024-04-18 20:44 43阅读 0赞

我们先看一个比较简单的（用jQuery实现）

# 示例图： #

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1Nlc3RpZA_size_16_color_FFFFFF_t_70][]

点击中间图片后...

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1Nlc3RpZA_size_16_color_FFFFFF_t_70 1][]

##  代码 ##

### html： ###

### css： ###

.middle-mid {
    	width: 56%;
    	height: 78%;
    	z-index: 5;
    }
    .middle-mid img {
    	width: 100%;
    	height: 100%;
    }
    .toggle {
    	position: fixed;
    	top: 0;
    	left: 0;
    	width: 100%;
    	height: 100%;
    	background-color: rgba(0,0,0,.6);
    	z-index: 20000;
    	display: none;
    }
    .toggle .timg {
    	position: fixed;
    	top:6%;
    	left: 18%;
    	width: 64%;
    	height: 88%;
    	z-index: 1001;
    	display: none;
    }
    .toggle .timg img {
    	width: 100%;
    	height: 100%;
    }

### js： ###

//点击显示蒙层，点击图片放大
    $(".middle-mid img").click(function(){
        $("#totop-img").hide();
        $(".toggle").show();
        $(".toggle .timg").fadeIn(600);
        $("html").css("overflow","hidden");//防止页面滑动
    });
    $(".toggle").click(function(){
        $(".toggle .timg").css("display","none");
        $(".toggle").hide();
        $("html").css("overflow","");
    });

一个效果比较好的，这个是转别人的

连接：[https://blog.csdn.net/q383965374/article/details/100105043][https_blog.csdn.net_q383965374_article_details_100105043]

# 示例图： #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96enEyMy5ibG9nLmNzZG4ubmV0_size_16_color_FFFFFF_t_70]

点击图片后......

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96enEyMy5ibG9nLmNzZG4ubmV0_size_16_color_FFFFFF_t_70 1]

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96enEyMy5ibG9nLmNzZG4ubmV0_size_16_color_FFFFFF_t_70 2]

## 完整代码： ##

<html>
     
    <head>
    
    <script src="./jquery.min.js"></script>
    <script type="text/javascript">
    	
    	$(function(){  
            $(".pic").click(function(){  
                var _this = $(this);//将当前的pimg元素作为_this传入函数  
                imgShow("#outerdiv", "#innerdiv", "#bigimg", _this);  
            });  
        });  
     
        function imgShow(outerdiv, innerdiv, bigimg, _this){  
            var src = _this.attr("src");//获取当前点击的pimg元素中的src属性  
            $(bigimg).attr("src", src);//设置#bigimg元素的src属性  
          
                /*获取当前点击图片的真实大小，并显示弹出层及大图*/  
            $("<img/>").attr("src", src).load(function(){  
                var windowW = $(window).width();//获取当前窗口宽度  
                var windowH = $(window).height();//获取当前窗口高度  
                var realWidth = this.width;//获取图片真实宽度  
                var realHeight = this.height;//获取图片真实高度  
                var imgWidth, imgHeight;  
                var scale = 0.8;//缩放尺寸，当图片真实宽度和高度大于窗口宽度和高度时进行缩放  
                  
                if(realHeight>windowH*scale) {//判断图片高度  
                    imgHeight = windowH*scale;//如大于窗口高度，图片高度进行缩放  
                    imgWidth = imgHeight/realHeight*realWidth;//等比例缩放宽度  
                    if(imgWidth>windowW*scale) {//如宽度扔大于窗口宽度  
                        imgWidth = windowW*scale;//再对宽度进行缩放  
                    }  
                } else if(realWidth>windowW*scale) {//如图片高度合适，判断图片宽度  
                    imgWidth = windowW*scale;//如大于窗口宽度，图片宽度进行缩放  
                                imgHeight = imgWidth/realWidth*realHeight;//等比例缩放高度  
                } else {//如果图片真实高度和宽度都符合要求，高宽不变  
                    imgWidth = realWidth;  
                    imgHeight = realHeight;  
                }  
                        $(bigimg).css("width",imgWidth);//以最终的宽度对图片缩放  
                  
                var w = (windowW-imgWidth)/2;//计算图片与窗口左边距  
                var h = (windowH-imgHeight)/2;//计算图片与窗口上边距  
                $(innerdiv).css({"top":h, "left":w});//设置#innerdiv的top和left属性  
                $(outerdiv).fadeIn("fast");//淡入显示#outerdiv及.pimg  
            });  
              
            $(outerdiv).click(function(){//再次点击淡出消失弹出层  
                $(this).fadeOut("fast");  
            });  
        }
    	
    </script>
    
    </head>
    <body>
    <div>
            <img height="100" width="100" src="https://cdn.pixabay.com/photo/2018/08/14/13/23/ocean-3605547_960_720.jpg" class="pic"/>
            <img height="100" width="100" src="https://cdn.pixabay.com/photo/2011/12/14/12/21/orion-nebula-11107_960_720.jpg" class="pic"/>
            <img height="100" width="100" src="https://cdn.pixabay.com/photo/2017/08/30/01/05/milky-way-2695569_960_720.jpg" class="pic"/>
        </div>
        <div id="outerdiv" style="position:fixed;top:0;left:0;background:rgba(0,0,0,0.7);z-index:2;width:100%;height:100%;display:none;">
        <div id="innerdiv" style="position:absolute;">
            <img id="bigimg" style="border:5px solid #fff;" src="" />
        </div>
    	
    	
    
    
    </body>
    </html>

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1Nlc3RpZA_size_16_color_FFFFFF_t_70 1]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/18/9369b47529c04bf2b1606fd3bd071c14.png
[https_blog.csdn.net_q383965374_article_details_100105043]: https://blog.csdn.net/q383965374/article/details/100105043
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96enEyMy5ibG9nLmNzZG4ubmV0_size_16_color_FFFFFF_t_70]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/18/e82e2d1553ce46198a59c81e30d992de.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96enEyMy5ibG9nLmNzZG4ubmV0_size_16_color_FFFFFF_t_70 1]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/18/d8e803fc24914b5abab45fcddcdd51ed.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly96enEyMy5ibG9nLmNzZG4ubmV0_size_16_color_FFFFFF_t_70 2]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/18/fcb3f2c174e64404bc4bbc57e3133521.png