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js method to imitate Baidu waterfall flow_javascript skills

WBOY
WBOYOriginal
2016-05-16 16:15:41970browse

The example in this article describes the method of using js to imitate Baidu waterfall flow. Share it with everyone for your reference. The specific implementation method is as follows: 

<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>仿百度图片瀑布流</title>
<link rel="stylesheet" type="text/css" href="style.css">
<script src="js/jquery.min.js"></script>
<style>
*{margin:0; padding:0;}
#container{
width: 1000px;
border:1px solid #f00;
margin: 50px auto;
position: relative;
}
#container img{
position: absolute;
}
#loader{
width: 100%;
height: 60px;
background: url(loader.gif) no-repeat center;
position: fixed;
bottom: 0;
left: 0;
}
</style>
</head>
<script type="text/javascript">
$(function(){
 var oContainer=$('#container');
 var oLoader=$('#loader');
 var iWidth=200;//列宽
 var iSpace=10;//列数
 var iOuterWidth=iWidth+iSpace;
 var sUrl = 'localhost/api/json/popular&#63;callback=&#63;';
 var iCell=0;
 var iPage=0;
 var arrL=[];
 var arrT=[];
 var iBtn=true;

 function setCells(){
  iCell= Math.floor($(window).innerWidth()/iOuterWidth);
  if(iCell < 3){
   iCell =3;
  }
  if(iCell >6){
   iCell =6;
  }
  oContainer.css('width',iOuterWidth*iCell-iSpace);
 }
 setCells();
 for(var i=0;i < iCell; i++){
  arrL.push(i*iOuterWidth);
  arrT.push(0);
 }
 //console.log(arrL)
 getData()
 function getData(){
  if(iBtn){
   iBtn =false
   oLoader.show();
   $.getJSON(sUrl,'page='+iPage,function(data){
    $.each(data,function(i,obj){
     var $img =$('<img>');
     $img.attr('src',obj.preview);
     var iHeight= iWidth /obj.width * obj.height;
     var index=getMin();
     $img.appendTo(oContainer);
     $img.css({width:iWidth,height: iHeight});
     $img.css({top:arrT[index],left: arrL[index]})
     arrT[index]+=iHeight +10;
     oLoader.hide();
    })
    iPage++;
    iBtn=true;
   })
  }
 }
 $(window).on('resize',function(){
  var iOldCell= iCell;
  setCells();
  var iH = $(window).scrollTop()+$(window).innerHeight();
  var iMinIndex= getMin();
  if(arrT[iMinIndex]+oContainer.offset().top < iH){
   getData();
  }
  if(iOldCell == iCell) return ;
  arrT=[];
  arrL=[];
  for(var i=0;i < iCell; i++){
   arrL.push(i*iOuterWidth);
   arrT.push(0);
  }
  var $img = oContainer.find('img');
  $img.each(function(index,obj){
   var index=getMin();
   $(this).animate({top:arrT[index],left: arrL[index]})
   arrT[index]+=$(this).height() +10;
  })
 })
 $(window).on('scroll',function(){
  var iH = $(window).scrollTop()+$(window).innerHeight();
  var iMinIndex= getMin();
  if(arrT[iMinIndex]+oContainer.offset().top < iH){
   getData();
  }
 })
 function getMin(){
  var iv= arrT[0];
  var _index=0;
  for(var i=0; i<arrT.length; i++){
   if(arrT[i] < iv){
    iv= arrT[i];
    _index=i;
   }
  }
  return _index ;
 }
})
</script>
<body>
 <div id="top">仿百度图片瀑布流</div> 
 <!--标题 e -->
 <div id="container"></div>
 <div id="loader"></div>
 <!--效果块 e -->
</body>
</html>

I hope this article will be helpful to everyone’s JavaScript programming design.

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