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Copy path瀑布流布局实战.html
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瀑布流布局实战.html
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<!DOCTYPE html>
<html>
<head lang="en">
<meta charset="UTF-8">
<title>瀑布流之自探究</title>
<style>
* {
margin: 0;
padding: 0;
}
.main {
position: relative;
}
.box {
/* border: 1px dashed black;*/
float: left;
}
.pic {
padding: 10px 10px 10px 10px;
}
.pic img {
border: 1px solid gray;
width: 100%;
display: block;
background-size: cover;
border-radius: 5px;
box-shadow: 0px 0px 23px 4px blue;
}
.clearfix:after {
display: block;
content: '';
visibility: hidden;
line-height: 0;
height: 0;
clear: both;
}
.clearfix {
*zoom: 1;
}
</style>
</head>
<body>
<div class="main clearfix">
<div class="box">
<div class="pic"><img src="images/01.png" alt=""/></div>
</div>
<div class="box">
<div class="pic"><img src="images/02.png" alt=""/></div>
</div>
<div class="box">
<div class="pic"><img src="images/03.png" alt=""/></div>
</div>
<div class="box">
<div class="pic"><img src="images/04.png" alt=""/></div>
</div>
<div class="box">
<div class="pic"><img src="images/05.png" alt=""/></div>
</div>
<div class="box">
<div class="pic"><img src="images/06.png" alt=""/></div>
</div>
<div class="box">
<div class="pic"><img src="images/07.png" alt=""/></div>
</div>
<div class="box">
<div class="pic"><img src="images/08.png" alt=""/></div>
</div>
<div class="box">
<div class="pic"><img src="images/09.png" alt=""/></div>
</div>
<div class="box">
<div class="pic"><img src="images/10.png" alt=""/></div>
</div>
<div class="box">
<div class="pic"><img src="images/11.png" alt=""/></div>
</div>
<div class="box">
<div class="pic"><img src="images/12.png" alt=""/></div>
</div>
<div class="box">
<div class="pic"><img src="images/13.png" alt=""/></div>
</div>
<div class="box">
<div class="pic"><img src="images/14.png" alt=""/></div>
</div>
<div class="box">
<div class="pic"><img src="images/15.png" alt=""/></div>
</div>
<div class="box">
<div class="pic"><img src="images/16.png" alt=""/></div>
</div>
<div class="box">
<div class="pic"><img src="images/17.png" alt=""/></div>
</div>
<div class="box">
<div class="pic"><img src="images/18.png" alt=""/></div>
</div>
<div class="box">
<div class="pic"><img src="images/19.png" alt=""/></div>
</div>
<div class="box">
<div class="pic"><img src="images/20.png" alt=""/></div>
</div>
</div>
<script src="jquery-3.1.0.js"></script>
<script>
console.time("abc")
//load是字符串
$(window).on("load", function () {
waterfall();
/* checkscroll()*/
//模拟从后台加载图片
var json = {"data": [{'src': 'images/03.png'}, {'src': 'images/09.png'}, {'src': 'images/10.png'}, {'src': 'images/11.png'}, {'src': 'images/12.png'}, {'src': 'images/13.png'}, {'src': 'images/14.png'}, {'src': 'images/15.png'}]}
$(window).on("scroll", function () {
/*console.log(1);*/
if (checkscroll()) {
$.each(json.data, function (i, v) {
$('<div></div>').addClass('box').appendTo($('.main'));
$('<div></div>').addClass('pic').appendTo('.box:last');
$('<img>').appendTo('.pic:last').attr("src", v.src);
/*$('<img>').attr("src", v.src)*/
waterfall();
})
}
})
}).on("resize", function () {
console.log("感应窗口扩大缩小");
waterfall();
/* checkscroll()*/
//模拟从后台加载图片
var json = {"data": [{'src': 'images/03.png'}, {'src': 'images/09.png'}, {'src': 'images/10.png'}, {'src': 'images/11.png'}, {'src': 'images/12.png'}, {'src': 'images/13.png'}, {'src': 'images/14.png'}, {'src': 'images/15.png'}]}
$(window).on("scroll", function () {
/*console.log(1);*/
if (checkscroll()) {
console.log(1);
$.each(json.data, function (i, v) {
$('<div></div>').addClass('box').appendTo($('.main'));
$('<div></div>').addClass('pic').appendTo('.box:last');
$('<img>').appendTo('.pic:last').attr("src", v.src);
/*$('<img>').attr("src", v.src)*/
waterfall();
})
}
})
});
//以瀑布的形式排列图片
function waterfall() {
var w = $(".main>div").eq(0).width();
//把第一个子div的宽度设置给后面所有的div
$(".main>div").css("width", w);
//确定每一行放多少列
console.log($(window).width());
var n = Math.floor($(window).width() / w);
/*console.log(n);*/
$(".main").width(n * w);
$(".main").css("margin", "0 auto");
var narray = [];
var minnarray, minindex;
$(".main>div").each(function (index, element) {
//记录第一行每个div的高
if (index < n) {
/*narray.push($(element).outerHeight(true))*/
narray[index] = $(element).outerHeight();
//解决窗口缩小没问题 但是窗口扩大出现问题的情况 通过调试看代码可以发现这个问题
//若窗口变小,只放下3张图，第4,5,6张会被添加上else后的style，所以style还要改回来
$(element).css({
"position": "static",
"top": "0",
"left": "0"
/* "position":"",
"top":"",
"left":""*/
});
} else {
minnarray = Math.min.apply(null, narray)
//求出数组中最小高度的索引
minindex = $.inArray(minnarray, narray);
/* narray[index]=$(element).outerHeight();*/
//思考下面这个话与narray[minindex]+=$(element).height()为什么有冲突????
/* narray[minindex]+=narray[index]; 这句话是错误的数组的索引没有超过n*/
/*$(element).offset().width=minindex*w+"px";
$(element).offset().height=narray[index]+"px";*/
/*console.log($(element).offset());*/
//offset偏移始终是相对于浏览器左上角
//这样不能设置
/*$(element).offset().left=minindex*w+"px";
$(element).offset().top=narray[index]+"px";*/
//这样设置
/*$(element).offset({"left":minindex*w,"top":narray[index]})*/
/* $(element).css({
"position":"absolute",
"left":minindex*w,
"top":minnarray
})*/
//上面的设置方法也是可行的
$(element).css({
"position": "absolute",
"left": $(".main>div").eq(minindex).position().left,
"top": minnarray
})
narray[minindex] += $(element).height()
}
})
}
function checkscroll() {
/* console.log($(".main>div:last").position().top);
console.log($(".main>div:last").offset().top);
console.log($(window).width());
console.log(1);*/
/*console.log($(".main>div:last").position().top + $(".main>div:last").outerHeight());
console.log($(window).scrollTop() );
console.log($(window).height() );
console.log($(window).height()+$(window).scrollTop());
console.log($(".main>div:last").offset())
能正确打印的前提是先执行waterflall
*/
//判断最后一张图的中间位置与网页被蜷曲的长度和页面的高度之和的大小,来确定加不加载图片
return ($(".main>div:last").position().top + $(".main>div:last").outerHeight() / 2) < ($(window).height() + $(window).scrollTop()) ? true : false;
}
console.timeEnd("abc")
</script>
</body>
</html>