1.为什么用rem
根据屏幕大小，自动调整大小
2.如何使用rem
分以下几步
a.用ps把设置稿弄成640px或者750px的（记得等比例缩放）
b.调试时记得把浏览器默认最小字体设置为最小。手机端是支持12px以下的字体的
c.引入meta头
<meta name="viewport" content="width=device-width,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no,minimal-ui">
d.引入reset文件
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
html, body, div, span, applet, object, iframe,h1, h2, h3, h4, h5, h6, p, blockquote, pre,a, abbr, acronym, address, big, cite, code,del, dfn, em, img, ins, kbd, q, s, samp,small, strike, strong, sub, sup, tt, var,b, u, i, center,dl, dt, dd, ol, ul, li,fieldset, form, label, legend,table, caption, tbody, tfoot, thead, tr, th, td,button,article, aside, canvas, details, embed, figure,figcaption, footer, header, hgroup, menu, nav,output, ruby, section, summary, time, mark,audio, video {margin: 0;padding: 0;border: 0;vertical-align: baseline;background: transparent;outline: none;-webkit-box-sizing: border-box;-moz-box-sizing: border-box;box-sizing: border-box;}article, aside, details, figcaption, figure, footer, header, hgroup, menu, nav, section { display: block; }ol, ul { list-style: none; }button{background: transparent;}blockquote, q { quotes: none; }blockquote:before, blockquote:after, q:before, q:after { content: ''; content: none; }strong { font-weight: bold; }table { border-collapse: collapse; border-spacing: 0; }img { border: 0; max-width: 100%; }html{line-height: initial;}body{font-size: 0.32rem;} |
e.引入js媒体查询文件
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
|
(function(doc, win) {var docEl = doc.documentElement,resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',recalc = function() {var clientWidth = docEl.clientWidth;if (!clientWidth) return;if (clientWidth >= 750) {docEl.style.fontSize = '100px';} else {docEl.style.fontSize = 100 * (clientWidth / 750) + 'px';}};if (!doc.addEventListener) return;win.addEventListener(resizeEvt, recalc, false);doc.addEventListener('DOMContentLoaded', recalc, false);})(document, window); |
f.直接在750px或640px的情况下切图，单位也直接用px
g.到http://www.520ued.com/把px转为rem,html的字体大小填100px。
H.收工！！
参考资料:
http://www.520ued.com/
http://bbs.it-home.org/thread-64920-1-1.html