h5在微信中怎么判断是ios还是安卓

 isAndroidOrIOS() {
        var u = navigator.userAgent;
        var isAndroid = u.indexOf('Android') > -1 || u.indexOf('Adr') > -1; //android终端
        var isiOS = !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/); //ios终端
        if (isAndroid) {
            return "android"
        }
        if (isiOS) {
            return "ios"
        }
        return false
    }