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：
[url=http://dummyimage.com/240x300/B5E61D/fff","width":240,"height":300,"name]http://dummyimage.com/240x300/B5E61D/fff","width":240,"height":300,"name[/url]":"图片1"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x210/333/fff","width":240,"height":210,"name]http://dummyimage.com/240x210/333/fff","width":240,"height":210,"name[/url]":"图片2"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x190/f60/fff","width":240,"height":190,"name]http://dummyimage.com/240x190/f60/fff","width":240,"height":190,"name[/url]":"图片3"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x230/B5E61D/fff","width":240,"height":230,"name]http://dummyimage.com/240x230/B5E61D/fff","width":240,"height":230,"name[/url]":"图片4"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x280/B5E61D/fff","width":240,"height":280,"name]http://dummyimage.com/240x280/B5E61D/fff","width":240,"height":280,"name[/url]":"图片5"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x260/eee/fff","width":240,"height":260,"name]http://dummyimage.com/240x260/eee/fff","width":240,"height":260,"name[/url]":"图片6"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x180/000/fff","width":240,"height":180,"name]http://dummyimage.com/240x180/000/fff","width":240,"height":180,"name[/url]":"图片7"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x240/B5E61D/fff","width":240,"height":240,"name]http://dummyimage.com/240x240/B5E61D/fff","width":240,"height":240,"name[/url]":"图片8"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x265/B5E61D/fff","width":240,"height":265,"name]http://dummyimage.com/240x265/B5E61D/fff","width":240,"height":265,"name[/url]":"图片9"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x245/259/fff","width":240,"height":245,"name]http://dummyimage.com/240x245/259/fff","width":240,"height":245,"name[/url]":"图片10"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x310/B5E61D/fff","width":240,"height":310,"name]http://dummyimage.com/240x310/B5E61D/fff","width":240,"height":310,"name[/url]":"图片11"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x210/B5E61D/fff","width":240,"height":210,"name]http://dummyimage.com/240x210/B5E61D/fff","width":240,"height":210,"name[/url]":"图片12"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x150/B5E61D/fff","width":240,"height":150,"name]http://dummyimage.com/240x150/B5E61D/fff","width":240,"height":150,"name[/url]":"图片13"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x165/B5E61D/fff","width":240,"height":165,"name]http://dummyimage.com/240x165/B5E61D/fff","width":240,"height":165,"name[/url]":"图片14"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x100/B5E61D/fff","width":240,"height":100,"name]http://dummyimage.com/240x100/B5E61D/fff","width":240,"height":100,"name[/url]":"图片15"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x280/B5E61D/fff","width":240,"height":280,"name]http://dummyimage.com/240x280/B5E61D/fff","width":240,"height":280,"name[/url]":"图片16"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x225/B5E61D/fff","width":240,"height":225,"name]http://dummyimage.com/240x225/B5E61D/fff","width":240,"height":225,"name[/url]":"图片17"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x210/B5E61D/fff","width":240,"height":210,"name]http://dummyimage.com/240x210/B5E61D/fff","width":240,"height":210,"name[/url]":"图片18"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x230/B5E61D/fff","width":240,"height":230,"name]http://dummyimage.com/240x230/B5E61D/fff","width":240,"height":230,"name[/url]":"图片19"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x210/B5E61D/fff","width":240,"height":210,"name]http://dummyimage.com/240x210/B5E61D/fff","width":240,"height":210,"name[/url]":"图片20"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x300/B5E61D/fff","width":240,"height":300,"name]http://dummyimage.com/240x300/B5E61D/fff","width":240,"height":300,"name[/url]":"图片21"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x210/333/fff","width":240,"height":210,"name]http://dummyimage.com/240x210/333/fff","width":240,"height":210,"name[/url]":"图片22"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x190/f60/fff","width":240,"height":190,"name]http://dummyimage.com/240x190/f60/fff","width":240,"height":190,"name[/url]":"图片23"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x230/B5E61D/fff","width":240,"height":230,"name]http://dummyimage.com/240x230/B5E61D/fff","width":240,"height":230,"name[/url]":"图片24"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x280/B5E61D/fff","width":240,"height":280,"name]http://dummyimage.com/240x280/B5E61D/fff","width":240,"height":280,"name[/url]":"图片25"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x210/eee/fff","width":240,"height":210,"name]http://dummyimage.com/240x210/eee/fff","width":240,"height":210,"name[/url]":"图片26"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x180/000/fff","width":240,"height":180,"name]http://dummyimage.com/240x180/000/fff","width":240,"height":180,"name[/url]":"图片27"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x240/B5E61D/fff","width":240,"height":240,"name]http://dummyimage.com/240x240/B5E61D/fff","width":240,"height":240,"name[/url]":"图片28"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x195/B5E61D/fff","width":240,"height":195,"name]http://dummyimage.com/240x195/B5E61D/fff","width":240,"height":195,"name[/url]":"图片29"},
{"href":"http:xxxxxxx","src":"[url=http://dummyimage.com/240x245/259/fff","width":240,"height":245,"name]http://dummyimage.com/240x245/259/fff","width":240,"height":245,"name[/url]":"图片30"}
]
}
var wallPic = 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){
var len = data.length,
n = 0;
for(;n<len;n++){
var k = 0;
n>(row-1)?k=n%row:k=n;
$li[k].innerHTML += '<a href="'+data[n].href+'" target="_blank"><img src="'+data[n].src+'" width="'+data[n].width+'" height="'+data[n].height+'" alt="'+data[n].name+'" /><span class="name">'+data[n].name+'</span></a>';
}
this.getOTop();
},
getOTop:function(){
oTop = Math.min.apply(null,[$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();
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