CSS3 弹性布局弹性流(flex-flow)属性详解和实例_html/css_WEB-ITnose

WBOY
Release: 2016-06-24 11:26:07
Original
1612 people have browsed it

弹性布局是CSS3引入的强大的布局方式,用来替代以前Web开发人员使用的一些复杂而易错hacks方法(如使用float进行类似流式布局)。

其中flex-flow是flex-direction和flex-wrap属性的简写方式,语法如下:

flex-flow: ||

flex-direction: row(初始值) | row-reverse | column | column-reverse

flex-wrap: nowrap(初始值) | wrap | wrap-reverse

flex-direction定义了弹性项目在弹性容器中的放置方向,默认是row,即行内方向(一般而言是由左往右,但注意这个和书写模式有关)。

flex-wrap定义是否需要拆行以使得弹性项目能被容器包含。*-reverse代表相反的方向。

两者结合起来即flex-flow属性就确定了弹性容器在main axis和cross axis两个方向上的显示方式,下面的例子很直观的说明了各个属性值的区别:


.flex-container {    display: flex;}.flex-container.first {    flex-flow: row;}/* Initial value. Main-axis is   inline, no wrap. */.flex-container.second {    flex-flow: column wrap;    -webkit-flex-flow: column wrap;}/* Main-axis is block-direction (top to bottom)   and lines wrap in the inline direction (rightwards). */.flex-container.third {    flex-flow: row-reverse wrap-reverse;}/* Main-axis is the opposite of inline direction   (right to left). New lines wrap upwards. *//* other styles just for format */ul {    padding: 0;}li {    list-style: none;}.flex-container {    background: deepskyblue;    width: 200px;    height: 200px;    margin: 5px auto;}.flex-container.first {    height: 100px;}.flex-item {    background: tomato;    padding: 5px;    width: 80px;    height: 80px;    margin: 5px;    line-height: 80px;    color: white;    font-weight: bold;    font-size: 2em;    text-align: center;}h1 {    font-size: 22px;    text-align: center;}.flex-demo {    display: flex;}
Copy after login
上例中的第1个弹性项列表使用了默认属性也就是row且不拆行,弹性项的宽度在需要的时候会被压缩。
第2个列表使用了column wrap,表示主轴方向是从上往下,而行拆分的方向是行内方向(向右)。
而第3个列表使用了row-reverse wrap-reverse,表示主轴方向是行内相反方向(从右到左),新行向上拆分。


你可以通过在线实例自己试试看:http://wow.techbrood.com/fiddle/16981


by iefreer

source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template