• 通过浏览器的 navigator.userAgent 判断是Android还是IOS：

一.判断是Android还是iOS

let u = navigator.userAgent;
let isAndroid = u.indexOf('Android') > -1 || u.indexOf('Adr') > -1;   //判断是否是 android终端
let isIOS = !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/);     //判断是否是 ios终端
console.log('是否是Android：' + isAndroid); //true,false
console.log('是否是iOS：' + isIOS);
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• 方法：

  judgeClient() {let u = navigator.userAgent;let isAndroid = u.indexOf('Android') > -1 || u.indexOf('Adr') > -1;   //判断是否是 android终端let isIOS = !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/);     //判断是否是 ios终端console.log('是否是Android：' + isAndroid); //true,falseconsole.log('是否是iOS：' + isIOS);if(isAndroid === true){return 'Android';}else if(isIOS === true){return 'IOS';}else{return 'PC';}},
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二.判断是Android还是iOS

if (/(iPhone|iPad|iPod|iOS)/i.test(navigator.userAgent)) {console.log('isIOS');
} else if (/(Android)/i.test(navigator.userAgent)) {console.log('isAndroid');
} else {console.log('isPC');
}
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• 方法：

  judgeClient() {let client = '';if (/(iPhone|iPad|iPod|iOS)/i.test(navigator.userAgent)) {  //判断iPhone|iPad|iPod|iOSclient = 'IOS';} else if (/(Android)/i.test(navigator.userAgent)) {  //判断Androidclient = 'Android';} else {client = 'PC';}return client;},
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三.判断PC还是移动端

  isPC: function () {/*true则pc，false则mobile*/let u = navigator.userAgent;let Agents = ["Android", "iPhone", "webOS", "BlackBerry", "SymbianOS", "Windows Phone", "iPad", "iPod"];let flag = true;for (let i = 0; i < Agents.length; i++) {if (u.indexOf(Agents[i]) > 0) {flag = false;break;}}return flag;},
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四.判断多种访问终端

  //判断访问终端let browser = {versions: function () {let u = navigator.userAgent, app = navigator.appVersion;return {trident: u.indexOf('Trident') > -1, //IE内核presto: u.indexOf('Presto') > -1, //opera内核webKit: u.indexOf('AppleWebKit') > -1, //苹果、谷歌内核gecko: u.indexOf('Gecko') > -1 && u.indexOf('KHTML') == -1,//火狐内核mobile: !!u.match(/AppleWebKit.*Mobile.*/), //是否为移动终端ios: !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/), //ios终端android: u.indexOf('Android') > -1 || u.indexOf('Adr') > -1, //android终端iPhone: u.indexOf('iPhone') > -1, //是否为iPhone或者QQHD浏览器iPad: u.indexOf('iPad') > -1, //是否iPadwebApp: u.indexOf('Safari') == -1, //是否web应该程序，没有头部与底部weixin: u.indexOf('MicroMessenger') > -1, //是否微信qq: u.match(/\sQQ/i) == " qq" //是否QQ};}(),language: (navigator.browserLanguage || navigator.language).toLowerCase()};
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• 使用

if (browser.versions.mobile) {console.log("is mobile");
}
if (browser.versions.ios) {console.log("is ios");
}
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五.判断浏览器当前使用的语言

  judgeLanguage() {// 判断浏览器当前使用的语言let currentLanguage = (navigator.browserLanguage || navigator.language).toLowerCase();    // 非IEif (!currentLanguage) {    // IE浏览器currentLanguage = navigator.browserLanguage;}console.log(currentLanguage);return currentLanguage;},
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