Определяем устройство, на котором запущена программа

Не редко возникает задача, определить тип устройства, на котором запущена программа под управлением iOS.
Вот простой и удобный способ.

// нужно добавить
// #include <sys/types.h>
// #include <sys/sysctl.h>

-(NSString*)hardwareDescription
{
    
    size_t size = 100;
    char *hw_machine = malloc(size);
    int name[] = {CTL_HW,HW_MACHINE};
    sysctl(name, 2, hw_machine, &size, NULL, 0);
    NSString *hardware = [NSString stringWithUTF8String:hw_machine];
    free(hw_machine);
    
    
    if ([hardware isEqualToString:@"iPhone1,1"]) return @"iPhone 2G";
    if ([hardware isEqualToString:@"iPhone1,2"]) return @"iPhone 3G";
    
    if ([hardware isEqualToString:@"iPhone2,1"]) return @"iPhone 3GS";
    
    if ([hardware isEqualToString:@"iPhone3,1"]) return @"iPhone 4";
    if ([hardware isEqualToString:@"iPhone3,2"]) return @"iPhone 4";
    if ([hardware isEqualToString:@"iPhone3,3"]) return @"iPhone 4 (CDMA)";
    
    if ([hardware isEqualToString:@"iPhone4,1"]) return @"iPhone 4S";
    if ([hardware isEqualToString:@"iPhone5,1"]) return @"iPhone 5";
    
    if ([hardware isEqualToString:@"iPhone5,2"]) return @"iPhone 5 (GSM+CDMA)";
    if ([hardware isEqualToString:@"iPhone5,3"]) return @"iPhone 5C (GSM/CDMA)";
    if ([hardware isEqualToString:@"iPhone5,4"]) return @"iPhone 5C (CDMA)";
    
    if ([hardware isEqualToString:@"iPhone6,1"]) return @"iPhone 5S";
    if ([hardware isEqualToString:@"iPhone6,2"]) return @"iPhone 5S (GSM/CDMA)";
    
    if ([hardware isEqualToString:@"iPod1,1"]) return @"iPod Touch (1 Gen)";
    if ([hardware isEqualToString:@"iPod2,1"]) return @"iPod Touch (2 Gen)";
    if ([hardware isEqualToString:@"iPod3,1"]) return @"iPod Touch (3 Gen)";
    if ([hardware isEqualToString:@"iPod4,1"]) return @"iPod Touch (4 Gen)";
    if ([hardware isEqualToString:@"iPod5,1"]) return @"iPod Touch (5 Gen)";
    
    if ([hardware isEqualToString:@"iPad1,1"]) return @"iPad";
    if ([hardware isEqualToString:@"iPad1,2"]) return @"iPad 3G";
    
    if ([hardware isEqualToString:@"iPad2,1"]) return @"iPad 2";
    if ([hardware isEqualToString:@"iPad2,2"]) return @"iPad 2 (GSM)";
    if ([hardware isEqualToString:@"iPad2,3"]) return @"iPad 2 (CDMA)";
    if ([hardware isEqualToString:@"iPad2,4"]) return @"iPad 2";
    if ([hardware isEqualToString:@"iPad2,5"]) return @"iPad Mini";
    if ([hardware isEqualToString:@"iPad2,6"]) return @"iPad Mini (GSM)";
    if ([hardware isEqualToString:@"iPad2,7"]) return @"iPad Mini (GSM+CDMA)";
    
    if ([hardware isEqualToString:@"iPad3,1"]) return @"iPad 3";
    if ([hardware isEqualToString:@"iPad3,2"]) return @"iPad 3 (GSM+CDMA)";
    if ([hardware isEqualToString:@"iPad3,3"]) return @"iPad 3 (GSM)";
    if ([hardware isEqualToString:@"iPad3,4"]) return @"iPad 4";
    if ([hardware isEqualToString:@"iPad3,5"]) return @"iPad 4 (GSM)";
    if ([hardware isEqualToString:@"iPad3,6"]) return @"iPad 4 (GSM+CDMA)";
    
    if ([hardware isEqualToString:@"iPad4,1"]) return @"iPad Air";
    if ([hardware isEqualToString:@"iPad4,2"]) return @"iPad Air (GSM)";
    if ([hardware isEqualToString:@"iPad4,4"]) return @"iPad Mini 2";
    if ([hardware isEqualToString:@"iPad4,5"]) return @"iPad Mini 2 (GSM)";
    
    if ([hardware isEqualToString:@"i386"]) return @"Simulator";
    if ([hardware isEqualToString:@"x86_64"]) return @"Simulator";
    
    return [NSString stringWithFormat:@"Unknown: %@",hardware];
}

На выходе — строка с названием устройства