深入学习js瀑布流布局

2019-11-20 08:45:09

字体：大中小

来源：转载

供稿：网友

本文实例为大家分享了js瀑布流布局学习资料，供大家参考，具体内容如下

特点：等宽不等高。
实现方式：Javascript/Jquery/CSS3多栏布局。
样例网站：花瓣网-->分类

一、JS实现瀑布流

index.html:页面结构

<!DOCTYPE html><html lang="en"><head>  <meta charset="UTF-8">  <title>瀑布流布局</title>  <link rel="stylesheet" href="styles/layout.css"></head><body>  <div id="main">    <div class="box"><div class="pic"><img src="../waterFall/pic/0.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/1.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/2.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/3.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/4.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/5.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/6.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/7.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/8.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/9.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/10.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/11.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/12.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/13.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/14.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/15.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/16.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/17.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/18.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/19.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/20.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/21.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/22.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/23.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/24.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/25.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/26.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/27.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/28.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/29.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/30.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/31.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/32.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/33.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/34.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/35.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/36.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/37.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/38.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/39.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/40.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/41.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/42.jpg" alt=""></div></div>    <div class="box"><div class="pic"><img src="../waterFall/pic/43.jpg" alt=""></div></div>  </div>  <script src="scripts/waterfall.js"></script></body></html>

layout.css:页面元素样式

*{  pdding:0;  margin:0;}div#main{  position: relative;}div.box{  padding:15px 0 0 15px;  float: left;}div.pic{  padding:10px;  border:1px solid #ccc;  border-radius:5px;  box-shadow: 0 0 5px #ccc;}.pic img{  height:auto;  width:165px;}

waterfall.js

window.onload=function(){  waterFall('main','box');  //模拟后台相应数据json  var dataInt={    "data":    [     {"src":"0.jpg"},     {"src":"1.jpg"},     {"src":"2.jpg"},     {"src":"3.jpg"},     {"src":"4.jpg"},     {"src":"5.jpg"},     {"src":"6.jpg"}    ]  }  window.onscroll=function(){    if(checkScrollSlide){      //将数据块渲染到当前页面的尾部     var oParent=document.getElementById("main");     for(var i=0;i<dataInt.data.length;i++){       var oBox=document.createElement("div");       oBox.className="box";       oParent.appendChild(oBox);       var oPic=document.createElement("div");       oPic.className="pic";       oBox.appendChild(oPic);       var img=document.createElement("img");       img.setAttribute("src",dataInt.data[i]);       img.src="pic/"+dataInt.data[i].src;       oPic.appendChild(img);     }     dataInt=null;//清空数据块，防止无限加载     waterFall('main','box');//对页面新元素进行布局渲染    }  }}function waterFall(parent,box){  //将main下的class为box的所有元素取出来  var oParent=document.getElementById(parent);  var oBoxs=getByClass(oParent,box);  console.log(oBoxs.length);  //计算整个页面显示的列数（页面宽/box宽）  var oBoxW=oBoxs[0].offsetWidth;  // console.log(oBoxW);  var cols=Math.floor(document.documentElement.clientWidth/oBoxW);  // console.log(cols);  //设置main的宽  oParent.style.cssText="width:"+oBoxW*cols+"px;margin:0 auto;"  var hArr=[];//存放每列高度的数组  for(var i=0;i<oBoxs.length;i++){    if(i<cols){      hArr.push(oBoxs[i].offsetHeight);    }else{      var minH=Math.min.apply(null,hArr);//获取当前数组最小高度值      // console.log(minH);      var index=getMinhIndex(hArr,minH);//获取数组最小高度的索引      //console.log(index);      oBoxs[i].style.position="absolute";//将之后的图片依次绝对定位      oBoxs[i].style.top=minH+"px";      oBoxs[i].style.left=index*oBoxW+"px";//计算新图片所在的位置并赋值      hArr[index]+=oBoxs[i].offsetHeight;//变化数组列的高度值，因为加上了一张图片    }    //console.log(hArr);  }}//根据class获取元素function getByClass(parent,clsName){  var boxArr=new Array(),//用来存储获取到的所有class为box的元素    oElements=parent.getElementsByTagName("*");    for(var i=0;i<oElements.length;i++){      if(oElements[i].className==clsName){        boxArr.push(oElements[i]);      }    }  return boxArr;}function getMinhIndex(arr,val){  for(var i=0;i<arr.length;i++){    if(arr[i]==val){      return i;    }  }}//检测是否具备滚动条加载数据块条件function checkScrollSlide(){  var oParent=document.getElementById("main");  var oBoxs=getByClass(oParent,"box");  var lastBoxH=oBoxs[oBoxs.length-1].offsetTop+Math.floor(oBoxs[oBoxs.length-1].offsetHeight/2);  var scrollTop=document.body.scrollTop||document.documentElement.scrollTop;//混杂模式和标准模式下的scrollTop获取  //console.log(scrollTop);  var height=document.body.clientHeight||document.documentElement.clientHeight;//混杂模式和标准模式下的浏览器窗口高度获取  return (lastBoxH<scrollTop+height)?true:false;//检测最后一个box高度是否小于滚动高度+窗口高度，返回布尔值}

二、JQuery

$( window ).on( "load", function(){  waterfall('main','pin');  var dataInt={'data':[{'src':'1.jpg'},{'src':'2.jpg'},{'src':'3.jpg'},{'src':'4.jpg'}]};  window.onscroll=function(){    if(checkscrollside()){      $.each( dataInt.data, function( index, value ){        var $oPin = $('<div>').addClass('pin').appendTo( $( "#main" ) );        var $oBox = $('<div>').addClass('box').appendTo( $oPin );        $('<img>').attr('src','./images/' + $( value).attr( 'src') ).appendTo($oBox);      });      waterfall();    };  }});/*  parend 父级id  pin 元素id*/function waterfall(parent,pin){  var $aPin = $( "#main>div" );  var iPinW = $aPin.eq( 0 ).width();// 一个块框pin的宽  var num = Math.floor( $( window ).width() / iPinW );//每行中能容纳的pin个数【窗口宽度除以一个块框宽度】  //oParent.style.cssText='width:'+iPinW*num+'px;ma rgin:0 auto;';//设置父级居中样式：定宽+自动水平外边距  $( "#main" ).css({    'width:' : iPinW * num,    'margin': '0 auto'  });  var pinHArr=[];//用于存储 每列中的所有块框相加的高度。  $aPin.each( function( index, value ){    var pinH = $aPin.eq( index ).height();    if( index < num ){      pinHArr[ index ] = pinH; //第一行中的num个块框pin 先添加进数组pinHArr    }else{      var minH = Math.min.apply( null, pinHArr );//数组pinHArr中的最小值minH      var minHIndex = $.inArray( minH, pinHArr );      $( value ).css({        'position': 'absolute',        'top': minH + 15,        'left': $aPin.eq( minHIndex ).position().left      });      //数组 最小高元素的高 + 添加上的aPin[i]块框高      pinHArr[ minHIndex ] += $aPin.eq( index ).height() + 15;//更新添加了块框后的列高    }  });}function checkscrollside(){  var $aPin = $( "#main>div" );  var lastPinH = $aPin.last().get(0).offsetTop + Math.floor($aPin.last().height()/2);//创建【触发添加块框函数waterfall()】的高度：最后一个块框的距离网页顶部+自身高的一半(实现未滚到底就开始加载)  var scrollTop = $( window ).scrollTop()//注意解决兼容性  var documentH = $( document ).height();//页面高度  return (lastPinH < scrollTop + documentH ) ? true : false;//到达指定高度后 返回true，触发waterfall()函数}

三、CSS多栏布局

.container{  -webkit-column-width:160px;  -moz-column-width:160px;    -webkit-column-gap:5px;   -moz-column-gap:5px;}/*数据块 砖块*/.container div{width:160px;        margin:4px 0;}

【css3和js实现方法比较】
--css3方式--
1：不需要计算，浏览器自动计算，只需设置1列宽，性能高
2:列宽随着浏览器宽口大小进行改变，用户体验不好；
3：图片排序按照垂直顺序排列，打乱图片显示顺序
4.图片加载还是需要js
--js方式--
js实现的瀑布流不会有上面的缺点，但是性能相对要差！

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持武林网。

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