基于zepto.js实现手机相册功能

看完老师的视频做的一个手机相册，对我这种菜鸟来说还是直接上代码吧！里面用到17张小图，17张大图，还有animate.css和zepto.min.js ,都可以在网上找到。

<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<!-- <meta name="viewport" content="width=device-width,initial-scale=1.0,user-scalable=no"/> -->
<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0"/>
<title>photo</title>
<link rel="stylesheet" href="animate.css"/>
<script src="zepto.min.js"></script>
<style type="text/css">
 blockquote,body,button,dd,dl,dt,fieldset,form,h1,h2,h3,h4,h5,h6,hr,input,legend,li,ol,p,pre,td,textarea,ul,li,img{
  margin: 0;
  padding: 0;
 }
 .clearfix::before,.clearfix::after{
  content:"";
  height: 0;
  line-height: 0;
  display: block;
  visibility: hidden;
  clear: both;
 }
 body{
  background-color: black;overflow: hidden;
 }
 ul{
  list-style: none;
 }
 .container li{
  float: left;
  overflow: hidden;
 }
 .large{
  height: 100%;
  width: 100%;
  position: absolute;
  left: 0;
  top: 0;
  background-color: black;
 }
</style>
</head>
<body>

<ul class="container clearfix" id="container">
</ul>

<div class="large animated fadeInDown" id="large_container" style="display: none;">
 <img id="large_img" />
</div>
<script>
 var num=17;
 var zWin=$(window);
 var render=function(){
  var padding=2;
  var winWidth=zWin.width();
  var picWidth=Math.floor((winWidth-padding*3)/4);
  var tmpl="";
  for (var i = 1; i <=num; i++) {
   var p = padding;
   var imgSrc='img/'+i+'.jpg';
   if (i%4==1) {
    p=0;
   }
   tmpl+='<li class="animated bounceIn" data-id="'+i+'" style=" width:'+picWidth+'px;height:'+picWidth+'px;padding-left:'+p+'px;padding-top:'+padding+'px "><canvas id="cvs_'+i+'"></canvas></li>'
   var imageObj=new Image();
    imageObj.index=i;
    imageObj.onload=function () {
     var cvs = $('#cvs_'+this.index)[0].getContext('2d');
     cvs.width=this.width;
     cvs.height=this.height;
     cvs.drawImage(this,0,0);
    }
    imageObj.src=imgSrc;
  }
  $("#container").html(tmpl);
 }
 render();
 var wImage = $('#large_img');
 var domImage = wImage[0];    //image对象的DOM应用
 var loadImg = function (id,callback) {
  $('#container').css({height:zWin.height(),'overflow':'hidden'})
  // $('#container').css({'display':'none'})
  $('#large_container').css({
   width:zWin.width(),
   height:zWin.height()
  }).show();
  //加载大图
  var imgsrc = 'img/'+id+'.large.jpg';
  var imageObj = new Image();
  imageObj.onload = function () {
   var w = this.width;   //图片的宽高
   var h = this.height;
   var winWidth = zWin.width();  //window的宽高
   var winHidth = zWin.height();
   var realw = winHidth*w/h;
   var paddingLeft = parseInt((winWidth - realw)/2);
   var realh = winWidth*h/w;
   var paddingTop = parseInt((winHidth - realh)/2);
   //横图和竖图切换时需要重置大图的css样式
   wImage.css('width','auto').css('height','auto');
   wImage.css('padding-left','0px').css('padding-top','0px');
   //计算图片的宽高比，判断是横图还是竖图
   if (h/w>1.2) {
    //图片显示出来
    wImage.attr('src',imgsrc).css('height',winHidth).css('padding-left',paddingLeft)
   }else{
    wImage.attr('src',imgsrc).css('width',winWidth).css('padding-top',paddingTop)
   }
   callback&&callback();
  }
  imageObj.src = imgsrc;
 }
 var cid;
 //给LI做事件绑定；
 $('#container').delegate('li','tap',function(){
  var _id = cid = $(this).attr('data-id')
  loadImg(_id)
 });

 //点击大图，返回相册
 $('#large_container').tap(function() {
  $('#container').css({height:'auto','overflow':'auto'})
  // $('#container').css({'display':'block'})
  $(this).hide();
 }).swipeLeft(function(){
  cid++;
  if(cid>num){
   cid = num;
  }else{
   loadImg(cid,function(){    //事件监听
    domImage.addEventListener('webkitAnimationEnd',function(){ //动画结束之后执行函数
     wImage.removeClass('animated bounceInRight');
     domImage.removeEventListener('webkitAnimationEnd')
    },false) //控制事件是否冒泡用false参数
    wImage.addClass('animated bounceInRight');
   });
  }
 }).swipeRight(function(){
  cid--;
  if(cid<1){
   cid = 1;
  }else{
   loadImg(cid,function(){
    domImage.addEventListener('webkitAnimationEnd',function(){
     wImage.removeClass('animated bounceInLeft');
     domImage.removeEventListener('webkitAnimationEnd')
    },false)
    wImage.addClass('animated bounceInLeft');
   });
  }
 })

</script>
</body>
</html>

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