//
//  UIDevice+Hardware.h
//  gauravds
//

#import <UIKit/UIKit.h>

@interface UIDevice (Hardware)

- (NSString *)modelIdentifier;
- (NSString *)modelName;

@end

为什么不创建一个分类呢?不要使用malloc方法安全泄露问题。使用安全的函数。

NSLog(@"%@ %@", [[UIDevice currentDevice] modelName], [[UIDevice currentDevice] modelIdentifier]);

查看实现

//
//  UIDevice+Hardware.m
//  gauravds
//

#import "UIDevice+Hardware.h"
#import <sys/utsname.h>

@implementation UIDevice (Hardware)

- (NSString *)modelIdentifier {
    struct utsname systemInfo;
    uname(&systemInfo);
    return [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];
}

- (NSString *)modelName {
    return [self modelNameForModelIdentifier:[self modelIdentifier]];
}

- (NSString *)modelNameForModelIdentifier:(NSString *)modelIdentifier {
    // iPhone http://theiphonewiki.com/wiki/IPhone

    if ([modelIdentifier isEqualToString:@"iPhone1,1"])    return @"iPhone 1G";
    if ([modelIdentifier isEqualToString:@"iPhone1,2"])    return @"iPhone 3G";
    if ([modelIdentifier isEqualToString:@"iPhone2,1"])    return @"iPhone 3GS";
    if ([modelIdentifier isEqualToString:@"iPhone3,1"])    return @"iPhone 4 (GSM)";
    if ([modelIdentifier isEqualToString:@"iPhone3,2"])    return @"iPhone 4 (GSM Rev A)";
    if ([modelIdentifier isEqualToString:@"iPhone3,3"])    return @"iPhone 4 (CDMA)";
    if ([modelIdentifier isEqualToString:@"iPhone4,1"])    return @"iPhone 4S";
    if ([modelIdentifier isEqualToString:@"iPhone5,1"])    return @"iPhone 5 (GSM)";
    if ([modelIdentifier isEqualToString:@"iPhone5,2"])    return @"iPhone 5 (Global)";
    if ([modelIdentifier isEqualToString:@"iPhone5,3"])    return @"iPhone 5c (GSM)";
    if ([modelIdentifier isEqualToString:@"iPhone5,4"])    return @"iPhone 5c (Global)";
    if ([modelIdentifier isEqualToString:@"iPhone6,1"])    return @"iPhone 5s (GSM)";
    if ([modelIdentifier isEqualToString:@"iPhone6,2"])    return @"iPhone 5s (Global)";
    if ([modelIdentifier isEqualToString:@"iPhone7,1"])    return @"iPhone 6 Plus";
    if ([modelIdentifier isEqualToString:@"iPhone7,2"])    return @"iPhone 6";
    if ([modelIdentifier isEqualToString:@"iPhone8,1"])    return @"iPhone 6s";
    if ([modelIdentifier isEqualToString:@"iPhone8,2"])    return @"iPhone 6s Plus";
    if ([modelIdentifier isEqualToString:@"iPhone8,4"])    return @"iPhone SE";
    if ([modelIdentifier isEqualToString:@"iPhone9,1"])    return @"iPhone 7";
    if ([modelIdentifier isEqualToString:@"iPhone9,2"])    return @"iPhone 7 Plus";
    if ([modelIdentifier isEqualToString:@"iPhone9,3"])    return @"iPhone 7";
    if ([modelIdentifier isEqualToString:@"iPhone9,4"])    return @"iPhone 7 Plus";
    if ([modelIdentifier isEqualToString:@"iPhone10,1"])   return @"iPhone 8";          // US (Verizon), China, Japan
    if ([modelIdentifier isEqualToString:@"iPhone10,2"])   return @"iPhone 8 Plus";     // US (Verizon), China, Japan
    if ([modelIdentifier isEqualToString:@"iPhone10,3"])   return @"iPhone X";          // US (Verizon), China, Japan
    if ([modelIdentifier isEqualToString:@"iPhone10,4"])   return @"iPhone 8";          // AT&T, Global
    if ([modelIdentifier isEqualToString:@"iPhone10,5"])   return @"iPhone 8 Plus";     // AT&T, Global
    if ([modelIdentifier isEqualToString:@"iPhone10,6"])   return @"iPhone X";          // AT&T, Global

    // iPad http://theiphonewiki.com/wiki/IPad

    if ([modelIdentifier isEqualToString:@"iPad1,1"])      return @"iPad 1G";
    if ([modelIdentifier isEqualToString:@"iPad2,1"])      return @"iPad 2 (Wi-Fi)";
    if ([modelIdentifier isEqualToString:@"iPad2,2"])      return @"iPad 2 (GSM)";
    if ([modelIdentifier isEqualToString:@"iPad2,3"])      return @"iPad 2 (CDMA)";
    if ([modelIdentifier isEqualToString:@"iPad2,4"])      return @"iPad 2 (Rev A)";
    if ([modelIdentifier isEqualToString:@"iPad3,1"])      return @"iPad 3 (Wi-Fi)";
    if ([modelIdentifier isEqualToString:@"iPad3,2"])      return @"iPad 3 (GSM)";
    if ([modelIdentifier isEqualToString:@"iPad3,3"])      return @"iPad 3 (Global)";
    if ([modelIdentifier isEqualToString:@"iPad3,4"])      return @"iPad 4 (Wi-Fi)";
    if ([modelIdentifier isEqualToString:@"iPad3,5"])      return @"iPad 4 (GSM)";
    if ([modelIdentifier isEqualToString:@"iPad3,6"])      return @"iPad 4 (Global)";
    if ([modelIdentifier isEqualToString:@"iPad6,11"])     return @"iPad (5th gen) (Wi-Fi)";
    if ([modelIdentifier isEqualToString:@"iPad6,12"])     return @"iPad (5th gen) (Cellular)";

    if ([modelIdentifier isEqualToString:@"iPad4,1"])      return @"iPad Air (Wi-Fi)";
    if ([modelIdentifier isEqualToString:@"iPad4,2"])      return @"iPad Air (Cellular)";
    if ([modelIdentifier isEqualToString:@"iPad5,3"])      return @"iPad Air 2 (Wi-Fi)";
    if ([modelIdentifier isEqualToString:@"iPad5,4"])      return @"iPad Air 2 (Cellular)";

    // iPad Mini http://theiphonewiki.com/wiki/IPad_mini

    if ([modelIdentifier isEqualToString:@"iPad2,5"])      return @"iPad mini 1G (Wi-Fi)";
    if ([modelIdentifier isEqualToString:@"iPad2,6"])      return @"iPad mini 1G (GSM)";
    if ([modelIdentifier isEqualToString:@"iPad2,7"])      return @"iPad mini 1G (Global)";
    if ([modelIdentifier isEqualToString:@"iPad4,4"])      return @"iPad mini 2G (Wi-Fi)";
    if ([modelIdentifier isEqualToString:@"iPad4,5"])      return @"iPad mini 2G (Cellular)";
    if ([modelIdentifier isEqualToString:@"iPad4,6"])      return @"iPad mini 2G (Cellular)"; // TD-LTE model see https://support.apple.com/en-us/HT201471#iPad-mini2
    if ([modelIdentifier isEqualToString:@"iPad4,7"])      return @"iPad mini 3G (Wi-Fi)";
    if ([modelIdentifier isEqualToString:@"iPad4,8"])      return @"iPad mini 3G (Cellular)";
    if ([modelIdentifier isEqualToString:@"iPad4,9"])      return @"iPad mini 3G (Cellular)";
    if ([modelIdentifier isEqualToString:@"iPad5,1"])      return @"iPad mini 4G (Wi-Fi)";
    if ([modelIdentifier isEqualToString:@"iPad5,2"])      return @"iPad mini 4G (Cellular)";

    // iPad Pro https://www.theiphonewiki.com/wiki/IPad_Pro

    if ([modelIdentifier isEqualToString:@"iPad6,3"])      return @"iPad Pro (9.7 inch) 1G (Wi-Fi)"; // http://pdadb.net/index.php?m=specs&id=9938&c=apple_ipad_pro_9.7-inch_a1673_wifi_32gb_apple_ipad_6,3
    if ([modelIdentifier isEqualToString:@"iPad6,4"])      return @"iPad Pro (9.7 inch) 1G (Cellular)"; // http://pdadb.net/index.php?m=specs&id=9981&c=apple_ipad_pro_9.7-inch_a1675_td-lte_32gb_apple_ipad_6,4
    if ([modelIdentifier isEqualToString:@"iPad6,7"])      return @"iPad Pro (12.9 inch) 1G (Wi-Fi)"; // http://pdadb.net/index.php?m=specs&id=8960&c=apple_ipad_pro_wifi_a1584_128gb
    if ([modelIdentifier isEqualToString:@"iPad6,8"])      return @"iPad Pro (12.9 inch) 1G (Cellular)"; // http://pdadb.net/index.php?m=specs&id=8965&c=apple_ipad_pro_td-lte_a1652_32gb_apple_ipad_6,8
    if ([modelIdentifier isEqualToString:@"iPad 7,1"])     return @"iPad Pro (12.9 inch) 2G (Wi-Fi)";
    if ([modelIdentifier isEqualToString:@"iPad 7,2"])     return @"iPad Pro (12.9 inch) 2G (Cellular)";
    if ([modelIdentifier isEqualToString:@"iPad 7,3"])     return @"iPad Pro (10.5 inch) 1G (Wi-Fi)";
    if ([modelIdentifier isEqualToString:@"iPad 7,4"])     return @"iPad Pro (10.5 inch) 1G (Cellular)";

    // iPod http://theiphonewiki.com/wiki/IPod

    if ([modelIdentifier isEqualToString:@"iPod1,1"])      return @"iPod touch 1G";
    if ([modelIdentifier isEqualToString:@"iPod2,1"])      return @"iPod touch 2G";
    if ([modelIdentifier isEqualToString:@"iPod3,1"])      return @"iPod touch 3G";
    if ([modelIdentifier isEqualToString:@"iPod4,1"])      return @"iPod touch 4G";
    if ([modelIdentifier isEqualToString:@"iPod5,1"])      return @"iPod touch 5G";
    if ([modelIdentifier isEqualToString:@"iPod7,1"])      return @"iPod touch 6G"; // as 6,1 was never released 7,1 is actually 6th generation

    // Apple TV https://www.theiphonewiki.com/wiki/Apple_TV

    if ([modelIdentifier isEqualToString:@"AppleTV1,1"])      return @"Apple TV 1G";
    if ([modelIdentifier isEqualToString:@"AppleTV2,1"])      return @"Apple TV 2G";
    if ([modelIdentifier isEqualToString:@"AppleTV3,1"])      return @"Apple TV 3G";
    if ([modelIdentifier isEqualToString:@"AppleTV3,2"])      return @"Apple TV 3G"; // small, incremental update over 3,1
    if ([modelIdentifier isEqualToString:@"AppleTV5,3"])      return @"Apple TV 4G"; // as 4,1 was never released, 5,1 is actually 4th generation

    // Simulator
    if ([modelIdentifier hasSuffix:@"86"] || [modelIdentifier isEqual:@"x86_64"])
    {
        BOOL smallerScreen = ([[UIScreen mainScreen] bounds].size.width < 768.0);
        return (smallerScreen ? @"iPhone Simulator" : @"iPad Simulator");
    }

    return modelIdentifier;
}

@end

扩展OhhMee上面的回答，我添加了一些故障保险，以支持未来未列入列表的设备:

#import <sys/utsname.h>
#import "MyClass.h"

@implementation MyClass
{
    //(your private ivars)
}

- (NSString*) deviceName
{
    struct utsname systemInfo;

    uname(&systemInfo);

    NSString* code = [NSString stringWithCString:systemInfo.machine
                                        encoding:NSUTF8StringEncoding];

    static NSDictionary* deviceNamesByCode = nil;

    if (!deviceNamesByCode) {

        deviceNamesByCode = @{@"i386"      : @"Simulator",
                              @"x86_64"    : @"Simulator",
                              @"iPod1,1"   : @"iPod Touch",        // (Original)
                              @"iPod2,1"   : @"iPod Touch",        // (Second Generation)
                              @"iPod3,1"   : @"iPod Touch",        // (Third Generation)
                              @"iPod4,1"   : @"iPod Touch",        // (Fourth Generation)
                              @"iPod7,1"   : @"iPod Touch",        // (6th Generation)       
                              @"iPhone1,1" : @"iPhone",            // (Original)
                              @"iPhone1,2" : @"iPhone",            // (3G)
                              @"iPhone2,1" : @"iPhone",            // (3GS)
                              @"iPad1,1"   : @"iPad",              // (Original)
                              @"iPad2,1"   : @"iPad 2",            //
                              @"iPad3,1"   : @"iPad",              // (3rd Generation)
                              @"iPhone3,1" : @"iPhone 4",          // (GSM)
                              @"iPhone3,3" : @"iPhone 4",          // (CDMA/Verizon/Sprint)
                              @"iPhone4,1" : @"iPhone 4S",         //
                              @"iPhone5,1" : @"iPhone 5",          // (model A1428, AT&T/Canada)
                              @"iPhone5,2" : @"iPhone 5",          // (model A1429, everything else)
                              @"iPad3,4"   : @"iPad",              // (4th Generation)
                              @"iPad2,5"   : @"iPad Mini",         // (Original)
                              @"iPhone5,3" : @"iPhone 5c",         // (model A1456, A1532 | GSM)
                              @"iPhone5,4" : @"iPhone 5c",         // (model A1507, A1516, A1526 (China), A1529 | Global)
                              @"iPhone6,1" : @"iPhone 5s",         // (model A1433, A1533 | GSM)
                              @"iPhone6,2" : @"iPhone 5s",         // (model A1457, A1518, A1528 (China), A1530 | Global)
                              @"iPhone7,1" : @"iPhone 6 Plus",     //
                              @"iPhone7,2" : @"iPhone 6",          //
                              @"iPhone8,1" : @"iPhone 6S",         //
                              @"iPhone8,2" : @"iPhone 6S Plus",    //
                              @"iPhone8,4" : @"iPhone SE",         //
                              @"iPhone9,1" : @"iPhone 7",          //
                              @"iPhone9,3" : @"iPhone 7",          //
                              @"iPhone9,2" : @"iPhone 7 Plus",     //
                              @"iPhone9,4" : @"iPhone 7 Plus",     //
                              @"iPhone10,1": @"iPhone 8",          // CDMA
                              @"iPhone10,4": @"iPhone 8",          // GSM
                              @"iPhone10,2": @"iPhone 8 Plus",     // CDMA
                              @"iPhone10,5": @"iPhone 8 Plus",     // GSM
                              @"iPhone10,3": @"iPhone X",          // CDMA
                              @"iPhone10,6": @"iPhone X",          // GSM
                              @"iPhone11,2": @"iPhone XS",         //
                              @"iPhone11,4": @"iPhone XS Max",     //
                              @"iPhone11,6": @"iPhone XS Max",     // China
                              @"iPhone11,8": @"iPhone XR",         //
                              @"iPhone12,1": @"iPhone 11",         //
                              @"iPhone12,3": @"iPhone 11 Pro",     //
                              @"iPhone12,5": @"iPhone 11 Pro Max", //

                              @"iPad4,1"   : @"iPad Air",          // 5th Generation iPad (iPad Air) - Wifi
                              @"iPad4,2"   : @"iPad Air",          // 5th Generation iPad (iPad Air) - Cellular
                              @"iPad4,4"   : @"iPad Mini",         // (2nd Generation iPad Mini - Wifi)
                              @"iPad4,5"   : @"iPad Mini",         // (2nd Generation iPad Mini - Cellular)
                              @"iPad4,7"   : @"iPad Mini",         // (3rd Generation iPad Mini - Wifi (model A1599))
                              @"iPad6,7"   : @"iPad Pro (12.9\")", // iPad Pro 12.9 inches - (model A1584) 
                              @"iPad6,8"   : @"iPad Pro (12.9\")", // iPad Pro 12.9 inches - (model A1652) 
                              @"iPad6,3"   : @"iPad Pro (9.7\")",  // iPad Pro 9.7 inches - (model A1673)
                              @"iPad6,4"   : @"iPad Pro (9.7\")"   // iPad Pro 9.7 inches - (models A1674 and A1675)
                              };
    }

    NSString* deviceName = [deviceNamesByCode objectForKey:code];

    if (!deviceName) {
        // Not found on database. At least guess main device type from string contents:

        if ([code rangeOfString:@"iPod"].location != NSNotFound) {
            deviceName = @"iPod Touch";
        }
        else if([code rangeOfString:@"iPad"].location != NSNotFound) {
            deviceName = @"iPad";
        }
        else if([code rangeOfString:@"iPhone"].location != NSNotFound){
            deviceName = @"iPhone";
        }
        else {
            deviceName = @"Unknown";
        }
    }

    return deviceName;
}

// (rest of class implementation omitted)

@end

我也省略了详细的信息(例如:“型号A1507, A1516, A1526(中国)，A1529 |全球”)，并将其放在评论中，以防你想将其用作面向用户的字符串，而不是吓坏他们。

编辑:这个答案使用Swift 2提供了类似的实现。

编辑2:我刚刚添加了iPad Pro型号(两种尺寸)。型号等供日后参考。可以在iPhone Wiki中找到。

编辑3:增加对iPhone XS、iPhone XS Max和iPhone XR的支持。

编辑4:增加对iPhone 11、iPhone 11 Pro和iPhone 11 Pro Max的支持。

你可以试试这个库:http://github.com/erica/uidevice-extension/(作者Erica Sadun)。(图书馆有7-8年的历史，已经过时了)

(示例代码):

    [[UIDevice currentDevice] platformType]   // ex: UIDevice4GiPhone
    [[UIDevice currentDevice] platformString] // ex: @"iPhone 4G"

或者你可以用这个方法:

您可以使用sys/utsname.h中的uname获取设备型号。例如:

objective - c

    #import <sys/utsname.h> // import it in your header or implementation file.

    NSString* deviceName()
    {
        struct utsname systemInfo;
        uname(&systemInfo);
    
        return [NSString stringWithCString:systemInfo.machine
                                  encoding:NSUTF8StringEncoding];
    }

斯威夫特3

    extension UIDevice {
        var modelName: String {
            var systemInfo = utsname()
            uname(&systemInfo)
            let machineMirror = Mirror(reflecting: systemInfo.machine)
            let identifier = machineMirror.children.reduce("") { identifier, element in
                guard let value = element.value as? Int8, value != 0 else { return identifier }
                return identifier + String(UnicodeScalar(UInt8(value)))
            }
            return identifier
        }
    }

    print(UIDevice.current.modelName)

结果应该是:

// Output on a simulator
@"i386"      on 32-bit Simulator
@"x86_64"    on 64-bit Simulator

// Output on an iPhone
@"iPhone1,1" on iPhone
@"iPhone1,2" on iPhone 3G
@"iPhone2,1" on iPhone 3GS
@"iPhone3,1" on iPhone 4 (GSM)
@"iPhone3,2" on iPhone 4 (GSM Rev A)
@"iPhone3,3" on iPhone 4 (CDMA/Verizon/Sprint)
@"iPhone4,1" on iPhone 4S
@"iPhone5,1" on iPhone 5 (model A1428, AT&T/Canada)
@"iPhone5,2" on iPhone 5 (model A1429, everything else)
@"iPhone5,3" on iPhone 5c (model A1456, A1532 | GSM)
@"iPhone5,4" on iPhone 5c (model A1507, A1516, A1526 (China), A1529 | Global)
@"iPhone6,1" on iPhone 5s (model A1433, A1533 | GSM)
@"iPhone6,2" on iPhone 5s (model A1457, A1518, A1528 (China), A1530 | Global)
@"iPhone7,1" on iPhone 6 Plus
@"iPhone7,2" on iPhone 6
@"iPhone8,1" on iPhone 6S
@"iPhone8,2" on iPhone 6S Plus
@"iPhone8,4" on iPhone SE
@"iPhone9,1" on iPhone 7 (CDMA)
@"iPhone9,3" on iPhone 7 (GSM)
@"iPhone9,2" on iPhone 7 Plus (CDMA)
@"iPhone9,4" on iPhone 7 Plus (GSM)
@"iPhone10,1" on iPhone 8 (CDMA)
@"iPhone10,4" on iPhone 8 (GSM)
@"iPhone10,2" on iPhone 8 Plus (CDMA)
@"iPhone10,5" on iPhone 8 Plus (GSM)
@"iPhone10,3" on iPhone X (CDMA)
@"iPhone10,6" on iPhone X (GSM)
@"iPhone11,2" on iPhone XS
@"iPhone11,4" on iPhone XS Max
@"iPhone11,6" on iPhone XS Max China
@"iPhone11,8" on iPhone XR
@"iPhone12,1" on iPhone 11
@"iPhone12,3" on iPhone 11 Pro
@"iPhone12,5" on iPhone 11 Pro Max
@"iPhone12,8" on iPhone SE (2nd Gen)
@"iPhone13,1" on iPhone 12 Mini
@"iPhone13,2" on iPhone 12
@"iPhone13,3" on iPhone 12 Pro
@"iPhone13,4" on iPhone 12 Pro Max

//iPad 1
@"iPad1,1" on iPad - Wifi (model A1219)
@"iPad1,2" on iPad - Wifi + Cellular (model A1337)

//iPad 2
@"iPad2,1" - Wifi (model A1395)
@"iPad2,2" - GSM (model A1396)
@"iPad2,3" - 3G (model A1397)
@"iPad2,4" - Wifi (model A1395)

// iPad Mini
@"iPad2,5" - Wifi (model A1432)
@"iPad2,6" - Wifi + Cellular (model  A1454)
@"iPad2,7" - Wifi + Cellular (model  A1455)

//iPad 3
@"iPad3,1" - Wifi (model A1416)
@"iPad3,2" - Wifi + Cellular (model  A1403)
@"iPad3,3" - Wifi + Cellular (model  A1430)

//iPad 4
@"iPad3,4" - Wifi (model A1458)
@"iPad3,5" - Wifi + Cellular (model  A1459)
@"iPad3,6" - Wifi + Cellular (model  A1460)

//iPad AIR
@"iPad4,1" - Wifi (model A1474)
@"iPad4,2" - Wifi + Cellular (model A1475)
@"iPad4,3" - Wifi + Cellular (model A1476)

// iPad Mini 2
@"iPad4,4" - Wifi (model A1489)
@"iPad4,5" - Wifi + Cellular (model A1490)
@"iPad4,6" - Wifi + Cellular (model A1491)

// iPad Mini 3
@"iPad4,7" - Wifi (model A1599)
@"iPad4,8" - Wifi + Cellular (model A1600)
@"iPad4,9" - Wifi + Cellular (model A1601)

// iPad Mini 4
@"iPad5,1" - Wifi (model A1538)
@"iPad5,2" - Wifi + Cellular (model A1550)

//iPad AIR 2
@"iPad5,3" - Wifi (model A1566)
@"iPad5,4" - Wifi + Cellular (model A1567)

// iPad PRO 9.7"
@"iPad6,3" - Wifi (model A1673)
@"iPad6,4" - Wifi + Cellular (model A1674)
@"iPad6,4" - Wifi + Cellular (model A1675)

//iPad PRO 12.9"
@"iPad6,7" - Wifi (model A1584)
@"iPad6,8" - Wifi + Cellular (model A1652)

//iPad (5th generation)
@"iPad6,11" - Wifi (model A1822)
@"iPad6,12" - Wifi + Cellular (model A1823)
         
//iPad PRO 12.9" (2nd Gen)
@"iPad7,1" - Wifi (model A1670)
@"iPad7,2" - Wifi + Cellular (model A1671)
@"iPad7,2" - Wifi + Cellular (model A1821)
         
//iPad PRO 10.5"
@"iPad7,3" - Wifi (model A1701)
@"iPad7,4" - Wifi + Cellular (model A1709)

// iPad (6th Gen)
@"iPad7,5" - WiFi
@"iPad7,6" - WiFi + Cellular

// iPad (7th Gen)
@"iPad7,11" - WiFi
@"iPad7,12" - WiFi + Cellular

//iPad PRO 11"
@"iPad8,1" - WiFi
@"iPad8,2" - 1TB, WiFi
@"iPad8,3" - WiFi + Cellular
@"iPad8,4" - 1TB, WiFi + Cellular

//iPad PRO 12.9" (3rd Gen)
@"iPad8,5" - WiFi
@"iPad8,6" - 1TB, WiFi
@"iPad8,7" - WiFi + Cellular
@"iPad8,8" - 1TB, WiFi + Cellular

//iPad PRO 11" (2nd Gen)
@"iPad8,9" - WiFi
@"iPad8,10" - 1TB, WiFi

//iPad PRO 12.9" (4th Gen)
@"iPad8,11" - (WiFi)
@"iPad8,12" - (WiFi+Cellular)

// iPad mini 5th Gen
@"iPad11,1" - WiFi
@"iPad11,2" - Wifi  + Cellular

// iPad Air 3rd Gen
@"iPad11,3" - Wifi 
@"iPad11,4" - Wifi  + Cellular

// iPad (8th Gen)
@"iPad11,6" - iPad 8th Gen (WiFi)
@"iPad11,7" - iPad 8th Gen (WiFi+Cellular)

// iPad Air 4th Gen
@"iPad13,1" - iPad air 4th Gen (WiFi)
@"iPad13,2" - iPad air 4th Gen (WiFi+Cellular)

//iPod Touch
@"iPod1,1"   on iPod Touch
@"iPod2,1"   on iPod Touch Second Generation
@"iPod3,1"   on iPod Touch Third Generation
@"iPod4,1"   on iPod Touch Fourth Generation
@"iPod5,1"   on iPod Touch 5th Generation
@"iPod7,1"   on iPod Touch 6th Generation
@"iPod9,1"   on iPod Touch 7th Generation

// Apple Watch
@"Watch1,1" on Apple Watch 38mm case
@"Watch1,2" on Apple Watch 38mm case
@"Watch2,6" on Apple Watch Series 1 38mm case
@"Watch2,7" on Apple Watch Series 1 42mm case
@"Watch2,3" on Apple Watch Series 2 38mm case
@"Watch2,4" on Apple Watch Series 2 42mm case
@"Watch3,1" on Apple Watch Series 3 38mm case (GPS+Cellular)
@"Watch3,2" on Apple Watch Series 3 42mm case (GPS+Cellular)
@"Watch3,3" on Apple Watch Series 3 38mm case (GPS)
@"Watch3,4" on Apple Watch Series 3 42mm case (GPS)
@"Watch4,1" on Apple Watch Series 4 40mm case (GPS)
@"Watch4,2" on Apple Watch Series 4 44mm case (GPS)
@"Watch4,3" on Apple Watch Series 4 40mm case (GPS+Cellular)
@"Watch4,4" on Apple Watch Series 4 44mm case (GPS+Cellular)
@"Watch5,1" on Apple Watch Series 5 40mm case (GPS)
@"Watch5,2" on Apple Watch Series 5 44mm case (GPS)
@"Watch5,3" on Apple Watch Series 5 40mm case (GPS+Cellular)
@"Watch5,4" on Apple Watch Series 5 44mm case (GPS+Cellular)
@"Watch5,9" on Apple Watch SE 40mm case (GPS)
@"Watch5,10" on Apple Watch SE 44mm case (GPS)
@"Watch5,11" on Apple Watch SE 40mm case (GPS+Cellular)
@"Watch5,12" on Apple Watch SE 44mm case (GPS+Cellular)
@"Watch6,1" on Apple Watch Series 6 40mm case (GPS)
@"Watch6,2" on Apple Watch Series 6 44mm case (GPS)
@"Watch6,3" on Apple Watch Series 6 40mm case (GPS+Cellular)
@"Watch6,4" on Apple Watch Series 6 44mm case (GPS+Cellular)

#import <sys/utsname.h>

#define HARDWARE @{@"i386": @"Simulator",@"x86_64": @"Simulator",@"iPod1,1": @"iPod Touch",@"iPod2,1": @"iPod Touch 2nd Generation",@"iPod3,1": @"iPod Touch 3rd Generation",@"iPod4,1": @"iPod Touch 4th Generation",@"iPhone1,1": @"iPhone",@"iPhone1,2": @"iPhone 3G",@"iPhone2,1": @"iPhone 3GS",@"iPhone3,1": @"iPhone 4",@"iPhone4,1": @"iPhone 4S",@"iPhone5,1": @"iPhone 5",@"iPhone5,2": @"iPhone 5",@"iPhone5,3": @"iPhone 5c",@"iPhone5,4": @"iPhone 5c",@"iPhone6,1": @"iPhone 5s",@"iPhone6,2": @"iPhone 5s",@"iPad1,1": @"iPad",@"iPad2,1": @"iPad 2",@"iPad3,1": @"iPad 3rd Generation ",@"iPad3,4": @"iPad 4th Generation ",@"iPad2,5": @"iPad Mini",@"iPad4,4": @"iPad Mini 2nd Generation - Wifi",@"iPad4,5": @"iPad Mini 2nd Generation - Cellular",@"iPad4,1": @"iPad Air 5th Generation - Wifi",@"iPad4,2": @"iPad Air 5th Generation - Cellular"}

@interface ViewController ()
@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    struct utsname systemInfo;
    uname(&systemInfo);
    NSLog(@"hardware: %@",[HARDWARE objectForKey:[NSString stringWithCString: systemInfo.machine encoding:NSUTF8StringEncoding]]);
}

为了节省别人的时间。 因为接受，必须投票回答建议库使用私人API和我的应用程序被拒绝，因为uidevice-extension就在昨天! 我切换到GBDeviceInfo库，安装为pod以及，现在它看起来不错，维护和更新到最新的设备。

[[UIDevice currentDevice] model]只返回iPhone或iPod，你不会得到能让你区分不同代设备的型号的数字。

编写这个方法:

#include <sys/sysctl.h>
...

+ (NSString *)getModel {
    size_t size;
    sysctlbyname("hw.machine", NULL, &size, NULL, 0);
    char *model = malloc(size);
    sysctlbyname("hw.machine", model, &size, NULL, 0);
    NSString *deviceModel = [NSString stringWithCString:model encoding:NSUTF8StringEncoding];
    free(model);
    return deviceModel;
}

当你需要模型的时候调用方法[self getModel]，你会得到例如:"iPhone5,1"对于超薄而快速的iPhone5。

一个好的做法是创建一个名为Utils.h/Utils的类。m并在那里放置像getModel这样的方法，这样你就可以从应用程序的任何地方获得这些信息，只需导入类并调用[Utils getModel];