如何识别“hw.machine”标识符可靠？

我正在寻找最官方的来源来完成/维护此方法：

-(NSString*)platformString
{
    NSString *platform = [self platform];

    if ([platform isEqualToString:@"iPhone1,1"])    return @"iPhone 1G";
    if ([platform isEqualToString:@"iPhone1,2"])    return @"iPhone 3G";
    if ([platform isEqualToString:@"iPhone2,1"])    return @"iPhone 3GS";

    if ([platform isEqualToString:@"iPhone3,1"])    return @"iPhone 4";
    if ([platform isEqualToString:@"iPhone3,2"])    return @"iPhone 4 (Other Carrier)";
    if ([platform isEqualToString:@"iPhone3,3"])    return @"iPhone 4 CDMA";
    if ([platform isEqualToString:@"iPhone4,1"])    return @"iPhone 4S";

    if ([platform isEqualToString:@"iPhone5,1"])    return @"iPhone 5";

    if ([platform isEqualToString:@"iPod1,1"])      return @"iPod Touch 1G";
    if ([platform isEqualToString:@"iPod2,1"])      return @"iPod Touch 2G";
    if ([platform isEqualToString:@"iPod3,1"])      return @"iPod Touch 3G";
    if ([platform isEqualToString:@"iPod4,1"])      return @"iPod Touch 4G";
    if ([platform isEqualToString:@"iPod5,1"])      return @"iPod Touch 5G";

    if ([platform isEqualToString:@"iPad1,1"])      return @"iPad";

    if ([platform isEqualToString:@"iPad2,1"])      return @"iPad 2 WiFi";
    if ([platform isEqualToString:@"iPad2,2"])      return @"iPad 2 GSM";
    if ([platform isEqualToString:@"iPad2,3"])      return @"iPad 2 CDMA";
    if ([platform isEqualToString:@"iPad2,4"])      return @"iPad 2 CDMAS";
    if ([platform isEqualToString:@"iPad2,5"])      return @"iPad Mini Wifi";
    if ([platform isEqualToString:@"iPad2,6"])      return @"iPad mini (Cellular ATT)";
    if ([platform isEqualToString:@"iPad2,7"])      return @"iPad mini (Cellular Verizon)";

    if ([platform isEqualToString:@"iPad3,1"])      return @"iPad 3 WiFi";
    if ([platform isEqualToString:@"iPad3,2"])      return @"iPad 3 CDMA";
    if ([platform isEqualToString:@"iPad3,3"])      return @"iPad 3 GSM";
    if ([platform isEqualToString:@"iPad3,4"])      return @"iPad 4 Wifi";
    if ([platform isEqualToString:@"iPad3,5"])      return @"iPad 3 (Cellular ATT)";
    if ([platform isEqualToString:@"iPad3,6"])      return @"iPad 3 (Cellular Verizon)";

    if ([platform isEqualToString:@"iPad4,1"])      return @"iPad 4 WiFi";
    if ([platform isEqualToString:@"iPad4,2"])      return @"iPad 4 GSM";
    if ([platform isEqualToString:@"iPad4,3"])      return @"iPad 4 CDMA";

    if ([platform isEqualToString:@"i386"])         return @"Simulator";
    if ([platform isEqualToString:@"x86_64"])       return @"Simulator";

    return [NSString stringWithFormat:@"Unknown: %@", platform];
}

苹果公司是否对此有任何声明？

或者是一个在某处进行过不错研究的富有探索精神的人？

为了澄清，我在幕后使用这段代码：

-(NSString*)getSysInfoByName:(char*) typeSpecifier
{
    size_t size;
    sysctlbyname(typeSpecifier, NULL, &size, NULL, 0);

    char *answer = malloc(size);
    sysctlbyname(typeSpecifier, answer, &size, NULL, 0);

    NSString *results = [NSString stringWithCString:answer encoding: NSUTF8StringEncoding];

    free(answer);
    return results;
}

-(NSString*)platform
{ return [self getSysInfoByName:"hw.machine"]; }

到目前为止我发现的一些非官方来源：

型号 - iPhone Wiki http://theiphonewiki.com/wiki/Models

iClarified - iPhone- 从哪里下载 iPhone 固件文件 http://www.iclarified.com/entry/index.php?enid=750

iClarified - iPad- 从哪里下载 iPad 固件文件 http://www.iclarified.com/entry/index.php?enid=8500

iClarified - iPod touch- 从哪里下载 iPod touch 固件文件 http://www.iclarified.com/entry/index.php?enid=757

不过，仍在寻找更官方的来源。

刚刚从 iPhone Wiki 中摘录（直到 iPhone 5S、iPad Air）：

-(NSDictionary*)deviceModelDataForMachineIDs
{
    return @{

         //iPad.
         @"iPad1,1" : @[ @"iPad 1G", @"Wi-Fi / GSM", @"A1219 / A1337" ],
         @"iPad2,1" : @[ @"iPad 2", @"Wi-Fi", @"A1395" ],
         @"iPad2,2" : @[ @"iPad 2", @"GSM", @"A1396" ],
         @"iPad2,3" : @[ @"iPad 2", @"CDMA", @"A1397" ],
         @"iPad2,4" : @[ @"iPad 2", @"Wi-Fi Rev A", @"A1395" ],
         @"iPad2,5" : @[ @"iPad mini", @"Wi-Fi", @"A1432" ],
         @"iPad2,6" : @[ @"iPad mini", @"GSM", @"A1454" ],
         @"iPad2,7" : @[ @"iPad mini", @"GSM+CDMA", @"A1455" ],
         @"iPad3,1" : @[ @"iPad 3", @"Wi-Fi", @"A1416" ],
         @"iPad3,2" : @[ @"iPad 3", @"GSM+CDMA", @"A1403" ],
         @"iPad3,3" : @[ @"iPad 3", @"GSM", @"A1430" ],
         @"iPad3,4" : @[ @"iPad 4", @"Wi-Fi", @"A1458" ],
         @"iPad3,5" : @[ @"iPad 4", @"GSM", @"A1459" ],
         @"iPad3,6" : @[ @"iPad 4", @"GSM+CDMA", @"A1460" ],
         @"iPad4,1" : @[ @"iPad Air", @"Wi‑Fi", @"A1474" ],
         @"iPad4,2" : @[ @"iPad Air", @"Cellular", @"A1475" ],
         @"iPad4,4" : @[ @"iPad mini 2", @"Wi‑Fi", @"A1489" ],
         @"iPad4,5" : @[ @"iPad mini 2", @"Cellular", @"A1517" ],
         @"iPad4,6" : @[ @"iPad mini 2", @"N/A", @"A1491" ],
         @"iPad4,7" : @[ @"iPad mini 3", @"N/A", @"A1599" ],
         @"iPad4,8" : @[ @"iPad mini 3", @"N/A", @"A1600" ],
         @"iPad4,9" : @[ @"iPad mini 3", @"N/A", @"A1601" ],
         @"iPad5,3" : @[ @"iPad Air 2", @"N/A", @"A1566" ],
         @"iPad5,4" : @[ @"iPad Air 2", @"N/A", @"A1567" ],

         //iPhone.
         @"iPhone1,1" : @[ @"iPhone 2G", @"GSM", @"A1203" ],
         @"iPhone1,2" : @[ @"iPhone 3G", @"GSM", @"A1241 / A13241" ],
         @"iPhone2,1" : @[ @"iPhone 3GS", @"GSM", @"A1303 / A13251" ],
         @"iPhone3,1" : @[ @"iPhone 4", @"GSM", @"A1332" ],
         @"iPhone3,2" : @[ @"iPhone 4", @"GSM Rev A", @"-" ],
         @"iPhone3,3" : @[ @"iPhone 4", @"CDMA", @"A1349" ],
         @"iPhone4,1" : @[ @"iPhone 4S", @"GSM+CDMA", @"A1387 / A14311" ],
         @"iPhone5,1" : @[ @"iPhone 5", @"GSM", @"A1428" ],
         @"iPhone5,2" : @[ @"iPhone 5", @"GSM+CDMA", @"A1429 / A14421" ],
         @"iPhone5,3" : @[ @"iPhone 5C", @"GSM", @"A1456 / A1532" ],
         @"iPhone5,4" : @[ @"iPhone 5C", @"Global", @"A1507 / A1516 / A1526 / A1529" ],
         @"iPhone6,1" : @[ @"iPhone 5S", @"GSM", @"A1433 / A1533" ],
         @"iPhone6,2" : @[ @"iPhone 5S", @"Global", @"A1457 / A1518 / A1528 / A1530" ],
         @"iPhone7,2" : @[ @"iPhone 6", @"N/A", @"A1549 / A1586" ],
         @"iPhone7,1" : @[ @"iPhone 6 Plus", @"N/A", @"A1522 / A1524" ],

         //iPod.
         @"iPod1,1" : @[ @"iPod touch 1G", @"-", @"A1213" ],
         @"iPod2,1" : @[ @"iPod touch 2G", @"-", @"A1288" ],
         @"iPod3,1" : @[ @"iPod touch 3G", @"-", @"A1318" ],
         @"iPod4,1" : @[ @"iPod touch 4G", @"-", @"A1367" ],
         @"iPod5,1" : @[ @"iPod touch 5G", @"-", @"A1421 / A1509" ]

    };
}

它现在是GitHub 上的 eppz!kit https://github.com/eppz/eppz-kit以及代码的其余部分。实施于EPPZDevice.h https://github.com/eppz/eppz-kit/blob/master/eppz!kit/EPPZDevice.h class.