jQuery实现瀑布流的取巧做法分享
分析:瀑布流,做法有2种
(1)绝对定位方案:每个单元格设置为绝对定位,通过计算,分别设置top,left即可实现
(2)浮动方案:弄N列布局(浮动),然后图片数据,按顺序依次插入,如N为3列,第一张图片插入到第一列,第二张图片插入到第二列,第三张图片插入到第三列,第四张图片插入到第一列........这样循环插入(不能自适应)
CSS与HTML代码:
body,ul,li{margin:0;margin:0;} ul{list-style:none;} .clearfix:after{visibility:hidden;display:block;font-size:0;content:"";clear:both;height:0;}.clearfix{*zoom:1} /*瀑布流*/ .wallList{width:860px;} .wallListli{float:left;display:inline;margin-right:16px;} .wallListlia{background:#eee;border:1pxsolid#ccc;padding:5px5px05px;display:block;margin-bottom:10px;} .wallListlia:hover{border-color:#f60;} .wallListli.name{display:block;text-align:center;padding:8px0;} .loadTips{text-align:center;padding:15px0;}
<divclass="wallList"id="wallList"> <ulclass="clearfix"> <li></li> <li></li> <li></li> </ul> <pclass="loadTips"id="loadTips"><span>正在加载......</span></p> </div>
使用jQuery实现,大概思路如下:
(1)获取N列中最小的高度值,JS提供的API是Math.min(),但这个API最多只能传入2个参数,所以就需要用aplly来扩展,Math.min.apply(null,[xxx,xxx,xxxx,xxxx])
(2)给window绑定scroll事件,下拉的时候获取$(document).scrollTop(),当$(document).scrollTop()大于最小的高度值,就ajax请求url,如果有数据,就往页面插入HTML结构,没有则提示“加载完”,然后window解绑此事件
//数据格式 vartestJson={ "status":1, "data":[ {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x300/B5E61D/fff","width":240,"height":300,"name":"图片1"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x210/333/fff","width":240,"height":210,"name":"图片2"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x190/f60/fff","width":240,"height":190,"name":"图片3"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x230/B5E61D/fff","width":240,"height":230,"name":"图片4"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x280/B5E61D/fff","width":240,"height":280,"name":"图片5"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x260/eee/fff","width":240,"height":260,"name":"图片6"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x180/000/fff","width":240,"height":180,"name":"图片7"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x240/B5E61D/fff","width":240,"height":240,"name":"图片8"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x265/B5E61D/fff","width":240,"height":265,"name":"图片9"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x245/259/fff","width":240,"height":245,"name":"图片10"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x310/B5E61D/fff","width":240,"height":310,"name":"图片11"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x210/B5E61D/fff","width":240,"height":210,"name":"图片12"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x150/B5E61D/fff","width":240,"height":150,"name":"图片13"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x165/B5E61D/fff","width":240,"height":165,"name":"图片14"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x100/B5E61D/fff","width":240,"height":100,"name":"图片15"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x280/B5E61D/fff","width":240,"height":280,"name":"图片16"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x225/B5E61D/fff","width":240,"height":225,"name":"图片17"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x210/B5E61D/fff","width":240,"height":210,"name":"图片18"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x230/B5E61D/fff","width":240,"height":230,"name":"图片19"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x210/B5E61D/fff","width":240,"height":210,"name":"图片20"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x300/B5E61D/fff","width":240,"height":300,"name":"图片21"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x210/333/fff","width":240,"height":210,"name":"图片22"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x190/f60/fff","width":240,"height":190,"name":"图片23"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x230/B5E61D/fff","width":240,"height":230,"name":"图片24"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x280/B5E61D/fff","width":240,"height":280,"name":"图片25"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x210/eee/fff","width":240,"height":210,"name":"图片26"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x180/000/fff","width":240,"height":180,"name":"图片27"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x240/B5E61D/fff","width":240,"height":240,"name":"图片28"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x195/B5E61D/fff","width":240,"height":195,"name":"图片29"}, {"href":"http:xxxxxxx","src":"http://dummyimage.com/240x245/259/fff","width":240,"height":245,"name":"图片30"} ] } varwallPic=function(){ var$target=$('#wallList'), $li=$target.find('li'), $tips=$('#loadTips'), oTop=0,//滚动判断的值 row=3,//列数 page=1,//ajax请求的页码值 url='xxxx',//ajax请求地址 on_off=true;//插入结构的开关,防止ajax错误性多次加载数据 return{ fillData:function(callback){ var_that=this; on_off=false; /*ajax --------------------*/ //$.get(url,{page:page,count:30},function(json){ // if(json.status==1){ // _that.appendHTML(json.data); // on_off=true; // page++; // }else{ // _that.loadedTips(); // } //},'json'); /*模拟测试-设置定时器模拟ajax请求数据 -----------------------*/ setTimeout(function(){ //模拟终止 if(page==3){ _that.loadedTips(); return; } _that.appendHTML(testJson.data); on_off=true; page++; },400); }, appendHTML:function(data){ varlen=data.length, n=0; for(;n<len;n++){ vark=0; n>(row-1)?k=n%row:k=n; $li[k].innerHTML+='<ahref="'+data[n].href+'"target="_blank"><imgsrc="'+data[n].src+'"width="'+data[n].width+'"height="'+data[n].height+'"alt="'+data[n].name+'"/><spanclass="name">'+data[n].name+'</span></a>'; } this.getOTop(); }, getOTop:function(){ oTop=Math.min.apply(null,[$li.eq(0).height(),$li.eq(1).height(),$li.eq(2).height()])+$target.offset().top; }, loadedTips:function(){ $('#loadTips').find('span').text('数据已加载完'); setTimeout(function(){ $('#loadTips').css({'visibility':'hidden'}); },200); //解绑事件 $(window).unbind('scroll',$.proxy(this.scrollEvent,this)); }, scrollEvent:function(){ if($(document).scrollTop()+$(window).height()>oTop&&on_off){ this.fillData(); } }, init:function(){ this.fillData(); $(window).bind('scroll',$.proxy(this.scrollEvent,this)); } } }(); wallPic.init();