jQuery网站商品图片放大镜效果

Posted 2021-04-08 轩宇网工作室

咳咳！请忽略封面图片，不要在乎那些细节。

首先引入jQuery

<script type="text/javascript" ></script>

样式CSS用到的样式肯定不能少

<style type="text/css">

/* reset */

body{font:12px/18px "宋体",arial,sans-serif;color:#585858;}

body,div,p,span,form,iframe,table,td,th,input,textarea,button,label,ul,ol,li,dl,dt,dd,h1,h2,h3,h4,h5,h6{margin:0;padding:0;}

h1,h2,h3,h4,h5,h6{font-size:100%; }

ul,ol,li,dl{list-style-type:none;}

em,i,dfn,cite,strong,small{font-style:normal;} 

img{border:0;}

fieldset,button,input,select,option{vertical-align:middle;font:12px/18px "宋体",arial,sans-serif;}

table{border-collapse:collapse;border-spacing:0}

textarea{resize:none}

/* color */

a:link,a:visited{color:#575757;text-decoration:none;}

a:hover{color:#ef4165;text-decoration:none;}

a:active{color:#1d7400;}

/* clearfix */

.clearfix:after{ visibility:hidden; display:block; font-size:0; content:" "; clear:both; height:0;}

*html .clearfix{ zoom:1;}

.preview{width:400px; height:465px; margin:50px 0px 0px 150px;}

/* smallImg */

.smallImg{position:relative; height:52px; margin-top:1px; background-color:#F1F0F0; padding:6px 5px; width:390px; overflow:hidden;float:left;}

.scrollbutton{width:14px; height:50px; overflow:hidden; position:relative; float:left; cursor:pointer; }

.scrollbutton.smallImgUp , .scrollbutton.smallImgUp.disabled{background:url(images/d_08.png) no-repeat;}

.scrollbutton.smallImgDown , .scrollbutton.smallImgDown.disabled{background:url(images/d_09.png) no-repeat; margin-left:375px; margin-top:-50px;}

#imageMenu {height:50px; width:360px; overflow:hidden; margin-left:0; float:left;}

#imageMenu li {height:50px; width:60px; overflow:hidden; float:left; text-align:center;}

#imageMenu li img{width:50px; height:50px;cursor:pointer;}

#imageMenu li#onlickImg img, #imageMenu li:hover img{ width:44px; height:44px; border:3px solid #959595;}

/* bigImg */

.bigImg{position:relative; float:left; width:400px; height:400px; overflow:hidden;}

.bigImg #midimg{width:400px; height:400px;}

.bigImg #winSelector{width:235px; height:230px;}

#winSelector{position:absolute; cursor:crosshair; filter:alpha(opacity=15); -moz-opacity:0.15; opacity:0.15; background-color:#000; border:1px solid #fff;}

/* bigView */

#bigView{position:absolute;border: 1px solid #959595; overflow: hidden; z-index:999;}

#bigView img{position:absolute;}

</style>

实现方法JavaScript

<script type="text/javascript">

$(document).ready(function(){

// 图片上下滚动

var count = $("#imageMenu li").length - 5; /* 显示 6 个 li标签内容 */

var interval = $("#imageMenu li:first").width();

var curIndex = 0;

$('.scrollbutton').click(function(){

if( $(this).hasClass('disabled') ) return false;

if ($(this).hasClass('smallImgUp')) --curIndex;

else ++curIndex;

$('.scrollbutton').removeClass('disabled');

if (curIndex == 0) $('.smallImgUp').addClass('disabled');

if (curIndex == count-1) $('.smallImgDown').addClass('disabled');

$("#imageMenu ul").stop(false, true).animate({"marginLeft" : -curIndex*interval + "px"}, 600);

});

// 解决 ie6 select框 问题

$.fn.decorateIframe = function(options) {

        if ($.browser.msie && $.browser.version < 7) {

            var opts = $.extend({}, $.fn.decorateIframe.defaults, options);

            $(this).each(function() {

                var $myThis = $(this);

                //创建一个IFRAME

                var divIframe = $("<iframe />");

                divIframe.attr("id", opts.iframeId);

                divIframe.css("position", "absolute");

                divIframe.css("display", "none");

                divIframe.css("display", "block");

                divIframe.css("z-index", opts.iframeZIndex);

                divIframe.css("border");

                divIframe.css("top", "0");

                divIframe.css("left", "0");

                if (opts.width == 0) {

                    divIframe.css("width", $myThis.width() + parseInt($myThis.css("padding")) * 2 + "px");

                }

                if (opts.height == 0) {

                    divIframe.css("height", $myThis.height() + parseInt($myThis.css("padding")) * 2 + "px");

                }

                divIframe.css("filter", "mask(color=#fff)");

                $myThis.append(divIframe);

            });

        }

    }

    $.fn.decorateIframe.defaults = {

        iframeId: "decorateIframe1",

        iframeZIndex: -1,

        width: 0,

        height: 0

    }

    //放大镜视窗

    $("#bigView").decorateIframe();

    //点击到中图

    var midChangeHandler = null;

    $("#imageMenu li img").bind("click", function(){

if ($(this).attr("id") != "onlickImg") {

midChange($(this).attr("src").replace("small", "mid"));

$("#imageMenu li").removeAttr("id");

$(this).parent().attr("id", "onlickImg");

}

})/*.bind("mouseover", function(){

if ($(this).attr("id") != "onlickImg") {

window.clearTimeout(midChangeHandler);

midChange($(this).attr("src").replace("small", "mid"));

$(this).css({ "border": "3px solid #959595" });

}

}).bind("mouseout", function(){

if($(this).attr("id") != "onlickImg"){

$(this).removeAttr("style");

midChangeHandler = window.setTimeout(function(){

midChange($("#onlickImg img").attr("src").replace("small", "mid"));

}, 1000);

}

})*/;

    function midChange(src) {

        $("#midimg").attr("src", src).load(function() {

            changeViewImg();

        });

    }

    //大视窗看图

    function mouseover(e) {

        if ($("#winSelector").css("display") == "none") {

            $("#winSelector,#bigView").show();

        }

        $("#winSelector").css(fixedPosition(e));

        e.stopPropagation();

    }

    function mouseOut(e) {

        if ($("#winSelector").css("display") != "none") {

            $("#winSelector,#bigView").hide();

        }

        e.stopPropagation();

    }

    $("#midimg").mouseover(mouseover); //中图事件

    $("#midimg,#winSelector").mousemove(mouseover).mouseout(mouseOut); //选择器事件

    var $divWidth = $("#winSelector").width(); //选择器宽度

    var $divHeight = $("#winSelector").height(); //选择器高度

    var $imgWidth = $("#midimg").width(); //中图宽度

    var $imgHeight = $("#midimg").height(); //中图高度

    var $viewImgWidth = $viewImgHeight = $height = null; //IE加载后才能得到 大图宽度 大图高度 大图视窗高度

    function changeViewImg() {

        $("#bigView img").attr("src", $("#midimg").attr("src").replace("mid", "big"));

    }

    changeViewImg();

    $("#bigView").scrollLeft(0).scrollTop(0);

    function fixedPosition(e) {

        if (e == null) {

            return;

        }

        var $imgLeft = $("#midimg").offset().left; //中图左边距

        var $imgTop = $("#midimg").offset().top; //中图上边距

        X = e.pageX - $imgLeft - $divWidth / 2; //selector顶点坐标 X

        Y = e.pageY - $imgTop - $divHeight / 2; //selector顶点坐标 Y

        X = X < 0 ? 0 : X;

        Y = Y < 0 ? 0 : Y;

        X = X + $divWidth > $imgWidth ? $imgWidth - $divWidth : X;

        Y = Y + $divHeight > $imgHeight ? $imgHeight - $divHeight : Y;

        if ($viewImgWidth == null) {

            $viewImgWidth = $("#bigView img").outerWidth();

            $viewImgHeight = $("#bigView img").height();

            if ($viewImgWidth < 200 || $viewImgHeight < 200) {

                $viewImgWidth = $viewImgHeight = 800;

            }

            $height = $divHeight * $viewImgHeight / $imgHeight;

            $("#bigView").width($divWidth * $viewImgWidth / $imgWidth);

            $("#bigView").height($height);

        }

        var scrollX = X * $viewImgWidth / $imgWidth;

        var scrollY = Y * $viewImgHeight / $imgHeight;

        $("#bigView img").css({ "left": scrollX * -1, "top": scrollY * -1 });

        $("#bigView").css({ "top": 50, "left": $(".preview").offset().left + $(".preview").width() + 15 });

        return { left: X, top: Y };

    }

});

</script>

最后——调用实例

<div class="preview">

<div id="vertical" class="bigImg">

<img width="400" height="400" alt="" id="midimg" />

<div style="display:none;" id="winSelector"></div>

</div><!--bigImg end-->

<div class="smallImg">

<div class="scrollbutton smallImgUp disabled"></div>

<div id="imageMenu">

<ul>

<li id="onlickImg"><img width="68" height="68" alt="洋妞"/></li>

<li><img width="68" height="68" alt="洋妞"/></li>

<li><img width="68" height="68" alt="洋妞"/></li>

<li><img width="68" height="68" alt="洋妞"/></li>

<li><img width="68" height="68" alt="洋妞"/></li>

<li><img width="68" height="68" alt="洋妞"/></li>

<li><img width="68" height="68" alt="洋妞"/></li>

</ul>

</div>

<div class="scrollbutton smallImgDown"></div>

</div><!--smallImg end-->

<div id="bigView" style="display:none;"><img width="800" height="800" alt="" /></div>

</div>

效果图：

链接：http://pan.baidu.com/s/1o7RlNnk 密码：90ce