JavaScript实现图片拖曳效果

时间:2020-05-16 周森人气:0

本文实例为大家分享了js实现图片拖曳效果的具体代码，供大家参考，具体内容如下

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>Title</title>
 <style>
  #pbox{
   width: 100%;
   height:100%;
  }
  #box{
   width: 200px;
   height: 200px;
   background:red;
   position: absolute;
  }
 </style>
</head>
<body>
<input type="button" id="btn" value="随机生成">
<div id="pbox">
<div id="box">

</div>
</div>
</body>
<script>
 var btn=document.getElementById("btn");//获取按钮
 var box=document.getElementById("box");//获取box
 var pbox=document.getElementById("pbox");//获取pbox
 var arr=['#fff143','#ff7500','#a3d900','#eedeb0','#ae7000','#b35c44','#392f41','#ff461f','#44cef6','#edd1db','#003371'];//随机颜色
 //给btn注册点击事件ain
 btn.onclick=function(){
   pbox.innerHTML="";//清空pbo
  for(var i=0;i<=10;i++){
   var newTip =box.cloneNode(true);
   pbox.appendChild(newTip);
   var left=parseInt(Math.random()*(900-100+1) + 100);//随机生成左边距
   var top=parseInt(Math.random()*(500-100+1) + 100);//随机生成上边距
   var bg=Math.floor((Math.random()*arr.length));//生成数组随机数获得随机数组下标
   box.style.background=arr[bg];//设置颜色
   box.style.top=top+"px";//设置上边距
   box.style.left=left+"px";//设置左边距

  }
  var c=pbox.children;

  for(var i=0;i< c.length;i++){
   c[i].onmousedown=function (e) {
//     alert(this.offsetLeft);
    var spacex=e.pageX-this.offsetLeft;
    var spacey=e.pageY-this.offsetTop;
    this.onmousemove=function (e) {
     this.style.left=e.pageX-spacex+"px";
     this.style.top=e.pageY-spacey+"px";
    }
   };
   c[i].onmouseup=function () {
    this.onmousemove=null;
   }
  }
 }
</script>
</html>

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