一:大家先下载metahandler.js
二:准备一个用px实现的移动页面(宽度固定死的页面),引入metahandler.js框架
1、视口设置
width=640,是根据psd图来设置,有多宽设置多宽(设计图是640的设置640)
<meta content="target-densitydpi=device-dpi,width=640" name="viewport">
2. 引入MetaHandler.js
<script type="text/javascript" src="js/MetaHandler.js"></script>
3、body设置宽度
body{ width:640px; }
三:修改MetaHandler.js文件的最后配置代码。在执行fixViewportWidth函数时,传入相应的像素值作为参数即可。
opt.fixViewportWidth(640); // 调用自适应屏幕的功能函数,640是根据psd图来设置,有多宽设置多宽
四. 然后按照电脑端的制作就可以了 全程用PX就可以的
五:横屏存在的兼容问题(测试地址http://c.3g.163.com/CreditMarket/default.html)
在使用谷歌浏览器进行浏览时,如果横屏后点击刷新,则页面会再缩小,成为居中显示状态,此时再竖屏之后,左右也会留白(此时再刷新是能重新恢复正常)。具体效果如下。
横屏后再刷新的效果:
从横屏恢复到纵屏的状态:
我们的看法:很少有人在旋转到横屏之后再刷新页面。而且目前移动端使用谷歌浏览器的人也很少,所以个人感觉这个bug是可以忽略的。另外,对于横屏转回到纵屏的时候,实际上我们是可以进行设备方向检测,然后再触发一次页面刷新,就不会出现纵屏上的问题了~
最后的话:我们使用了这个框架进行页面的开发,但是最近在使用时,感觉到在一些浏览器当中有些卡顿,用同样的设备和浏览器去测试了网易的手机页面,倒是没有什么卡顿现象,关于卡顿的问题,目前还在思考当中~~~
六:metahandler.js应用成功案例
1、http://c.3g.163.com/CreditMarket/default.html
2、http://m.deja.me/topics/#/special/9
3、http://impicture.lofter.com/
最终: JS代码
!function () {
var opt = function() {
var ua = navigator.userAgent,
android = ua.match(/(Android);?[\s\/]+([\d.]+)?/),
ipad = ua.match(/(iPad).*OS\s([\d_]+)/),
ipod = ua.match(/(iPod)(.*OS\s([\d_]+))?/),
iphone = !ipad && ua.match(/(iPhone\sOS)\s([\d_]+)/),
os = {}; if (android){ os.android = true, os.version = android[2];}
if (iphone && !ipod) {os.ios = os.iphone = true, os.version = iphone[2].replace(/_/g, '.');}
if (ipad) {os.ios = os.ipad = true, os.version = ipad[2].replace(/_/g, '.');}
if (ipod) {os.ios = os.ipod = true, os.version = ipod[3] ? ipod[3].replace(/_/g, '.') : null;} var MetaHandler = function(){
//MONOSTATE
if(MetaHandler.prototype.instance){
return MetaHandler.prototype.instance;
}
var me = this;
var meta = {},_els; /**
* _els
* meta = {name:{content:String,seriation:Array,store:{property:String},...},...}
* @method init
*/
function init(){
_els = document.getElementsByTagName('meta');
for(var i=0;i<_els.length;i++){
var name = _els[i].name;
if(name){
meta[name] = {};
meta[name].el = _els[i];
meta[name].content = _els[i].content;
meta[name].seriation = meta[name].content.split(',');
meta[name].store = getContentStore(name);
}
}
return me;
}
function getContentStore(name){
var content = meta[name].seriation,store = {};
for(var i=0;i<content.length;i++){
if(content[i].length<1){
content[i] = null;
delete content[i];
content.length--;
}else{
var ct = content[i].split('='),
pp = ct[0];
if(pp){
store[pp] = ct[1];
}
}
}
return store;
}
this.hasMeta = function(name){
return meta[name]?1:0;
}
this.createMeta = function(name){
if(!this.hasMeta(name)){
var el = document.createElement('meta');
el.name = name;
document.head.appendChild(el);
meta[name] = {};
meta[name].el = el;
meta[name].content = '';
meta[name].seriation = [];
meta[name].store = {};
}
return me;
}
this.setContent = function(name,value){
meta[name].content = value;
meta[name].el.content = value;
return me;
}
this.getContent = function(name){
return meta[name] && meta[name].content;
}
function updateContent(name){
meta[name].content = meta[name].seriation.join(',');
me.setContent(name,meta[name].content);
return me;
}
this.removeContentProperty = function(name,property){
var _property = property;
if(meta[name]){
if(meta[name].store[_property]!=null){
for(var i = 0;i<meta[name].seriation.length;i++){
if(meta[name].seriation[i].indexOf(property+'=')!=-1){
meta[name].seriation[i] = null;
delete meta[name].seriation[i];
break;
}
}
}
updateContent(name);
}
return me;
}
this.getContentProperty = function(name,property){
return meta[name] && meta[name].store[property];
}
this.setContentProperty = function(name,property,value){
var _property = property,
pv = property+'='+value;
if(meta[name]){
if(meta[name].store[_property]!=null){
meta[name].store[_property] = value;
for(var i = 0;i<meta[name].seriation.length;i++){
if(meta[name].seriation[i].indexOf(property+'=')!=-1){
meta[name].seriation[i] = pv;
break;
}
}
}else{
meta[name].store[_property] = value;
meta[name].seriation.push(pv);
}
updateContent(name);
}
return me;
} this.fixViewportWidth = function(width,fixBody){
width = width || me.getContentProperty('viewport','width');
if(width != 'device-width'){
var iw = window.innerWidth || width,
ow = window.outerWidth || iw,
sw = window.screen.width || iw,
saw = window.screen.availWidth || iw,
ih = window.innerHeight || width,
oh = window.outerHeight || ih,
sh = window.screen.height || ih,
sah = window.screen.availHeight || ih,
w = Math.min(iw,ow,sw,saw,ih,oh,sh,sah),
ratio = w/width,
dpr = window.devicePixelRatio;
ratio = Math.min(ratio,dpr); //fixBody may trigger a reflow,you should not use it if you could do it in your css
if(fixBody){
document.body.style.width = width+'px';
} if(os.android){
me.removeContentProperty('viewport','user-scalable')
.setContentProperty('viewport','target-densitydpi','device-dpi')
.setContentProperty('viewport','initial-scale',ratio)
.setContentProperty('viewport','maximum-scale',ratio);
}else if(os.ios && !os.android){
me.setContentProperty('viewport','user-scalable','no');
if(os.ios && parseInt(os.version)<7){
me.setContentProperty('viewport','initial-scale',ratio);
}
}
}
}
init();
//MONOSTATE
MetaHandler.prototype.instance = this;
};
return new MetaHandler;
}(); // HTML5友情提示 —— 调用自适应屏幕的功能函数
opt.fixViewportWidth(1080);
}();