关于javascript:判断设备类型

判断是否是微信

//判断是否是微信浏览器的函数，在微信登陆的中央须要function isWeiXin() {    //window.navigator.userAgent属性蕴含了浏览器类型、版本、操作系统类型、浏览器引擎类型等信息，这个属性能够用来判断浏览器类型    var ua = window.navigator.userAgent.toLowerCase();    //通过正则表达式匹配ua中是否含有MicroMessenger字符串    if (ua.match(/MicroMessenger/i) == 'micromessenger') {        return true;    } else {        return false;    }}

判断是否是ios

function isIOS() {    var u = navigator.userAgent;    var isiOS = !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/);     //ios终端    return isiOS;}

判断是否是pc端

/*检测设施,ISPC true  pc;false wx*/function IsPC() {    var userAgentInfo = navigator.userAgent;    var Agents = ["Android", "iPhone",        "SymbianOS", "Windows Phone",        "iPad", "iPod"    ];    var flag = true;    for (var v = 0; v < Agents.length; v++) {        if (userAgentInfo.indexOf(Agents[v]) > 0) {            flag = false;            break;        }    }    return flag;}var ISPC = IsPC();

我的项目里要求是否是pc/wx
微信分电脑微信和手机微信(android/ios)
手机端上进行横竖屏解决

if(ISPC){}else if(isWeiXin()){           if(window.navigator.userAgent.match(/(phone|pad|pod|iPhone|iPod|ios|iPad|Android|Mobile|BlackBerry|IEMobile|MQQBrowser|JUC|Fennec|wOSBrowser|BrowserNG|WebOS|Symbian|Windows Phone)/i)) {              //手机端           if(isIOS()){           //ios            if (document.body.offsetWidth > document.body.offsetHeight) {            //横屏            } else if (document.body.offsetWidth < document.body.offsetHeight) {            //竖屏            }           }else{           //android           if (screen && screen.orientation) {                //手机微信andriod                if (screen.orientation.type === 'landscape-primary') {                //横屏                 } else if (screen.orientation.type === 'portrait-primary') {                 //竖屏                 }           }         }else{         //电脑端         }}