JS完美运动框架

Posted 2020-09-18

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    function move(obj,json,fn){
      clearInterval(obj.timer);
      obj.timer = setInterval(function(){
        var flag = true;
        for(var attr in json){
          //判断属性
          if(attr == ‘opacity‘){
            var stl = Math.round(parseFloat(getstyle(obj,attr))*100);
            var spd = (json[attr]-stl)>0?Math.ceil((json[attr]-stl)/10):Math.floor((json[attr]-stl)/10);
          }
          else{
            var stl = parseInt(getstyle(obj,attr));
            var spd = (json[attr]-stl)>0?Math.ceil((json[attr]-stl)/10):Math.floor((json[attr]-stl)/10);
          }
          //判断停止或运动
          if(stl != json[attr]){
            flag = false;
            if(attr == ‘opacity‘){
              obj.style.filter = ‘alpha(opacity=‘+stl+obj.spd+‘)‘;
              obj.style.opacity = (stl+spd)/100;
            }
            else{
              obj.style[attr] = stl+spd+‘px‘;
            }
          }
        } 
        if(flag){
          clearInterval(obj.timer);
          if(fn){fn();}
        }
      },30)
    }

    function getstyle(obj,attr){
      if(obj.currentStyle){
        return obj.currentStyle[attr];
      }
      else{
        return getComputedStyle(obj,false)[attr];
      }
    }

实例：

<!doctype html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>实例</title>
  <style type="text/css">
    *{margin:0;padding:0;}
    ul{padding:10px;list-style-type:none;width:234px;border:1px solid black;}
    li{display:inline-block;width:50px;height:50px;margin:10px;overflow:hidden;position:relative;border:1px solid red;}
    img{position:relative;top:6px;left:13px;opacity:1;}
    p{position:absolute;bottom:0;width:50px;height:20px;text-align:center;font-family:Microsoft Yahei;font-size:14px;color:red;}
  </style>
  <script>

    function move(obj,json,fn){
      clearInterval(obj.timer);
      obj.timer = setInterval(function(){
        var flag = true;
        for(var attr in json){
          //判断属性
          if(attr == ‘opacity‘){
            var stl = Math.round(parseFloat(getstyle(obj,attr))*100);
            var spd = (json[attr]-stl)>0?Math.ceil((json[attr]-stl)/10):Math.floor((json[attr]-stl)/10);
          }
          else{
            var stl = parseInt(getstyle(obj,attr));
            var spd = (json[attr]-stl)>0?Math.ceil((json[attr]-stl)/10):Math.floor((json[attr]-stl)/10);
          }
          //判断停止或运动
          if(stl != json[attr]){
            flag = false;
            if(attr == ‘opacity‘){
              obj.style.filter = ‘alpha(opacity=‘+stl+obj.spd+‘)‘;
              obj.style.opacity = (stl+spd)/100;
            }
            else{
              obj.style[attr] = stl+spd+‘px‘;
            }
          }
        } 
        if(flag){
          clearInterval(obj.timer);
          if(fn){fn();}
        }
      },30)
    }

    function getstyle(obj,attr){
      if(obj.currentStyle){
        return obj.currentStyle[attr];
      }
      else{
        return getComputedStyle(obj,false)[attr];
      }
    }

  </script>
  <script>
    window.onload = function(){
      var img = document.getElementsByTagName(‘img‘);
      for(var i = 0;i<img.length;i++){
        img[i].onmouseover = function(){
          var th = this;
          move(this,{top:-15,opacity:0},function(){
            th.style.top = ‘15px‘;
            move(th,{top:6,opacity:100});
          });
        }
      }
    }
  </script>
</head>
<body>
  <ul>
    <li><img src=‘http://img.alicdn.com/tfs/TB1vQzVOVXXXXX4XpXXXXXXXXXX-220-1170.png‘ /><p>彩票</p></li>
    <li><img src=‘http://img.alicdn.com/tfs/TB1vQzVOVXXXXX4XpXXXXXXXXXX-220-1170.png‘ /><p>电影</p></li>
    <li><img src=‘http://img.alicdn.com/tfs/TB1vQzVOVXXXXX4XpXXXXXXXXXX-220-1170.png‘ /><p>游戏</p></li>
    <li><img src=‘http://img.alicdn.com/tfs/TB1vQzVOVXXXXX4XpXXXXXXXXXX-220-1170.png‘ /><p>充话费</p></li>
    <li><img src=‘http://img.alicdn.com/tfs/TB1vQzVOVXXXXX4XpXXXXXXXXXX-220-1170.png‘ /><p>旅行</p></li>
    <li><img src=‘http://img.alicdn.com/tfs/TB1vQzVOVXXXXX4XpXXXXXXXXXX-220-1170.png‘ /><p>酒店</p></li>
  </ul>
</body>
</html>

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