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jQuery实现简单的图片查看器

项目中自己diy了一个图片查看器。因为初始代码不是自己的，只是在上面改了一下也没有弄的很漂亮。等以后有时间了在重写一下样式和封装，作为备用的只是积累吧。如果有童鞋有用到，完全可以在此基础上改，比较容易，代码也比较简单

图片查看器主要有几个功能：

　1.显示图片和图片信息（图片名称、发布者等等）

　　2.切换图片

　　3.关闭图片查看器

初始化接口函数pictureViewer.init: function(picInfos,tapNumber,isBig)

picInfos: 传入图片组信息，必须，格式如下
 var picInfos = [
 {
  "url" : "default.png",
  "data": [
  {
  "key":"名称:",
  "value":"测试图片"
  },
  {
  "key":"发布者：",
  "value":"chua"
  }
  ]
 },
 {
  "url" : "test.jpeg",
  "data": [
  {
  "key":"名称",
  "value":"测试图片"
  },
  {
  "key":"发布者：",
  "value":"发大水发大水发顺风h"
  },
  {
  "key":"这个图片的其他信息",
  "value":"vsfsgsdgfds234323424"
  }
  ]
 },
 ...
 ] //传入参数的样式

tapNumber: 要显示的图片在图片列表中的索引，必须，从0开始
isBig：是否使用大图查看，默认是false，可选
html及css源码如下（后面有一个例子）

<!DOCTYPE html>
<html lang="ch-cn">
 <head>
　　<meta charset="utf-8">
　　<script type="text/javascript" src='jquery-1.9.1.js'></script>
 <link rel="stylesheet" type="text/css" href="imgTap.css">
 <script type="text/javascript" src='imgTap.js'></script>
 <style type="text/css">
 html,body, div, dl, dt, dd, ul, ol, li, h1, h2, h3, h4, h5, h6, pre, code, form, fieldset, legend, input, button, textarea, p, blockquote, th, td{
 margin: 0;
 padding:0;
 }
 *{
 -webkit-box-sizing: border-box;
 -moz-box-sizing: border-box;
 box-sizing: border-box;
 }

 body{
 font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
 }
 .imgTapDetail {
 display: none;
 position: absolute;
 z-index: 2000;
 top: 0;
 width: 100%;
 height: 100%;
 background: none transparent scroll repeat 0% 0%;
 color: #000 !important;
 }
 .page-secShadow {
 position: absolute;
 top: 0;
 left: 0;
 width: 100%;
 height: 100%;
 background: #000;
 background-color: rgba(0,0,0,.3);
 filter: alpha(opacity=50);
 }

 .page-shadowContent {
 width: 40%;
 margin: 0 auto;
 margin-top: 20%;
 position: relative !important;
 min-width: 400px;
 }
 .page-shadowContent.widget-big{

 }
 .leftTap, .rightTap {
 margin-top: 50%;
 width: 80px;
 height: 80px;
 border-radius: 50%;
 position: absolute;
 top: -80px;
 cursor: pointer;
 }
 .leftTap {
 left: -30%;
 background: url("imgTap.png") 0 0 no-repeat;
 }
 .rightTap {
 right: -30%;
 background: url("imgTap.png") -80px 0 no-repeat;
 }
 .closeTap {
 width: 60px;
 height: 60px;
 border-radius: 50%;
 position: absolute;
 right: -30px;
 top: -30px;
 cursor: pointer;
 background: url("imgTap.png") 0 -165px no-repeat;
 z-index: 99;
 }
 .widget {
 padding: 0 5px;
 -webkit-box-shadow: none;
 -moz-box-shadow: none;
 box-shadow: none;
 margin: 3px 0 10px 0;
 }
 .widget-body {
 background-color: #fff;
 -webkit-box-shadow: 1px 0 10px 1px rgba(0,0,0,.3);
 -moz-box-shadow: 1px 0 10px 1px rgba(0,0,0,.3);
 box-shadow: 1px 0 10px 1px rgba(0,0,0,.3);
 padding: 12px;
 }
 .page-shadowContent .widget-body {
 min-height: 200px;
 padding: 15px!important;
 border: 1px solid #ccc;
 overflow: hidden;
 }
 .widget-body .row {
 margin-right: -10px !important;
 margin-left: -10px !important;
 }
 .imgShow {
 text-align: center;
 height: 400px;
 padding-left: 10px;
 padding-right: 10px;
 /*background: url(default.png) center no-repeat;*/
 }
 #tapContent{
 padding-left: 10px;
 padding-right: 10px;
 }
 .imgContent {
 max-width: 400px;
 max-height: 400px;
 vertical-align: middle;
 }
 .widget-body img {
 max-width: 100%;
 height: auto!important;
 }
 .imgShow > span {
 height: 100%;
 display: inline-block;
 vertical-align: middle;
 } 
 .imgTapDetail .form-group {
 overflow: hidden;
 margin-bottom: 0 !important;
 position: relative;
 min-height: 34px;
 }
 .widget-detail .form-group .detail-LabelStyle {
 float: left;
 padding-left: 5px;
 /* max-width: 50%; */
 text-align: left;
 line-height: 34px!important;
 color: rgb(115, 115, 115);
 padding-right: 5px;
 height: 34px;
 overflow: hidden;
 left: 0;
 top: 0;
 }
 .widget-detail .form-group .detail-SpanStyle {
 padding: 8px 0 6px 5px;
 line-height: 20px;
 width: auto;
 height: auto!important;
 min-height: 34px;
 float: left;
 /* margin-left: 80px; */
 word-break: break-all;
 }
 .widget-big {
 width: 80%;
 min-width: 300px;
 }
 .widget-big .leftTap{
 left: -10%;
 }
 .widget-big .rightTap{
 right: -10%;
 }
 .widget-big .widget-detail{
 padding: 40px 0;
 }
 .widget-big .imgShow{
 min-height: 500px;
 }
 .widget-big .imgShow img{
 max-width: 800px; 
 max-height: 550px;
 }
 </style>
 </head>
 <body >
 <div class="imgTapDetail"></div>
 <script type="text/javascript">
 var picInfos = [
 {
 "url" : "default.png",
 "data": [
  {
  "key":"名称:",
  "value":"测试图片"
  },
  {
  "key":"发布者：",
  "value":"chua"
  }
 ]
 },
 {
 "url" : "test.jpeg",
 "data": [
  {
  "key":"名称",
  "value":"测试图片"
  },
  {
  "key":"发布者：",
  "value":"发大水发大水发顺风h"
  },
  {
  "key":"这个图片的其他信息",
  "value":"vsfsgsdgfds234323424"
  }
 ]
 }
 ] 
 pictureViewer.init(picInfos,0,true);
 </script> 
</html>

js的源码如下

pictureViewer = {
 picInfos: [],
 curPicIndex: 0,
 isBig:false,//大图查看？默认为false。默认图片显示区域为window宽度的40%，大图为80%
 imgTapSelector:".imgTapDetail",
 init: function(picInfos,tapNumber,isBig){
 var _this = this;

 _this.picInfos = picInfos;
 _this.curPicIndex = tapNumber;
 _this.isBig = isBig;
 tapImgInit();
 
 //图片查看器初始化
 function tapImgInit(){
  //页面代码和事件只需要初始化一次即可
  if(!_this.guid){
  _this.guid = 1;
  initTapImgHtml();
  $(document).on("click","#rightTap",function(){
   _this.curPicIndex++;
   if(_this.curPicIndex == _this.picInfos.length){
   _this.curPicIndex = 0;
   }
   $("#tapContent").html("")
   tapImg()
  }).on("click","#leftTap",function(){
   _this.curPicIndex--;
   if(_this.curPicIndex < 0){
   _this.curPicIndex = _this.picInfos.length-1;
   }
   $("#tapContent").html("")
   tapImg();
  }).on("click","#closeTap",function(){
   $(_this.imgTapSelector).hide("fast")
  })
  }
  var offTop = top.document.body.scrollTop || top.document.documentElement.scrollTop;
  $('#imgTapPanel').css("margin-top",_this.isBig?(offTop>30?offTop:30):offTop + 100)
  tapImg();
  $(_this.imgTapSelector).show("fast");
 }
 //初始化图片查看器的html代码
 function initTapImgHtml(){
  var $detailText = '<div class="page-secShadow" >'
  + '<div id="imgTapPanel" class="page-shadowContent '+(_this.isBig?"widget-big":"")+'">'
  + '<div id="leftTap" class="leftTap"></div>'
  + '<div id="rightTap" class="rightTap"></div>'
  + '<div id="closeTap" class="closeTap"></div>'
  + '<div class="widget row"><div class="widget-body">'
  + '<div class="widget-detail row">'
  + '<div class="imgShow">'
  + '<img src="logo.png" id="tapImg" class="imgContent"><span></span>'
  + '</div>'
  + '<div id="tapContent"></div>'
  + '</div></div></div></div></div>'; 
  
  $(_this.imgTapSelector).html($detailText);
  hoverButton("#leftTap", 0, 0, 0, "-80px");
  hoverButton("#rightTap", "-80px", 0, "-80px", "-80px");
  hoverButton("#closeTap", 0, "-165px", "-60px", "-165px");
 }
 //添加左右切换图标、关闭图标的hover响应事件。这个其实可以起到css中更好一些
 function hoverButton(id, x, y, A, B){
  $(id).hover(function(){
  $(this).css('background-position', A + ' '+ B)
  },function(){
  $(this).css('background-position', x + ' '+ y)
  })
 }
 //刷新当前图片及图片信息
 function tapImg(){
  var reg = /[:：]$/,
  leftTap = $("#leftTap"),
  rightTap = $("#rightTap"),
  imgTap = $("#tapImg"),
  contentTap = $("#tapContent");

  leftTap.css("display","block");
  rightTap.css("display","block");
  if(_this.picInfos.length == 1){
  leftTap.css("display","none");
  rightTap.css("display","none");
  }
  imgTap.attr("src",_this.picInfos[_this.curPicIndex].url);

  var data = _this.picInfos[_this.curPicIndex].data,
  dataLength = data.length,
  $text = "";

  for(var i=0; i<dataLength; i++){
  $text += '<div class="form-group">'
   + '<label class="detail-LabelStyle">'+data[i].key.replace(reg,"")+'：</label>'
   + '<span id="spanLoginName" class="detail-SpanStyle">'+data[i].value+'</span>'
   + '</div>';
  };
  contentTap.empty().append($text);

  setTimeout(function(){
  if(_this.isBig && imgTap.height() > 400){
   imgTap.parent().attr("style","height:inherit");
  }else{
   imgTap.parent().removeAttr("style");
  }
  },1);
 }
 }
}

希望本文所述对大家学习javascript程序设计有所帮助。

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