js如何判断安卓客户端还是ios客户端

Android

var isAndroid = navigator.userAgent.indexOf('Android') > -1 || navigator.userAgent.indexOf('Adr') > -1; //返回true即为Android客户端

IOS

var isiOS = !!navigator.userAgent.match(/\(i[^;]+;( U;)? cpu.+Mac OS X/); ////返回true即为IOS客户端

true