用户可通过设置->通用->关于手机->型号名称查看到设备型号，那我们怎么用代码获取这个设备型号呢？

// 引入头文件
#import <sys/utsname.h>

/// 获取设备型号，该型号就是 设置->通用->关于手机->型号名称
+ (NSString *)getDeviceModelName {
    struct utsname systemInfo;
    
    if (uname(&systemInfo) < 0) {
        return @"";
    } else {
        // 获取设备标识Identifier
        NSString *deviceIdentifer = [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];
        // 根据identifier去匹配到对应的型号名称
        NSString *modelName = [[self modelList] objectForKey:deviceIdentifer];
        return modelName?:@"";
    }
}

/// 只列出了iphone、ipad和simulator的型号，其他设备型号请到 https://www.theiphonewiki.com/wiki/Models 查看
+ (NSDictionary *)modelList {
    // @{identifier: name}
    return @{
        // iPhone
        @"iPhone1,1" : @"iPhone",
        @"iPhone1,2" : @"iPhone 3G",
        @"iPhone2,1" : @"iPhone 3GS",
        @"iPhone3,1" : @"iPhone 4",
        @"iPhone3,2" : @"iPhone 4",
        @"iPhone3,3" : @"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",
        @"iPhone7,2" : @"iPhone 6",
        @"iPhone7,1" : @"iPhone 6 Plus",
        @"iPhone8,1" : @"iPhone 6s",
        @"iPhone8,2" : @"iPhone 6s Plus",
        @"iPhone8,4" : @"iPhone SE (1st generation)",
        @"iPhone9,1" : @"iPhone 7",
        @"iPhone9,3" : @"iPhone 7",
        @"iPhone9,2" : @"iPhone 7 Plus",
        @"iPhone9,4" : @"iPhone 7 Plus",
        @"iPhone10,1" : @"iPhone 8",
        @"iPhone10,4" : @"iPhone 8",
        @"iPhone10,2" : @"iPhone 8 Plus",
        @"iPhone10,5" : @"iPhone 8 Plus",
        @"iPhone10,3" : @"iPhone X",
        @"iPhone10,6" : @"iPhone X",
        @"iPhone11,8" : @"iPhone XR",
        @"iPhone11,2" : @"iPhone XS",
        @"iPhone11,6" : @"iPhone XS Max",
        @"iPhone11,4" : @"iPhone XS Max",
        @"iPhone12,1" : @"iPhone 11",
        @"iPhone12,3" : @"iPhone 11 Pro",
        @"iPhone12,5" : @"iPhone 11 Pro Max",
        @"iPhone12,8" : @"iPhone SE (2nd generation)",
        @"iPhone13,1" : @"iPhone 12 mini",
        @"iPhone13,2" : @"iPhone 12",
        @"iPhone13,3" : @"iPhone 12 Pro",
        @"iPhone13,4" : @"iPhone 12 Pro Max",
        @"iPhone14,4" : @"iPhone 13 mini",
        @"iPhone14,5" : @"iPhone 13",
        @"iPhone14,2" : @"iPhone 13 Pro",
        @"iPhone14,3" : @"iPhone 13 Pro Max",
        @"iPhone14,6" : @"iPhone SE (3rd generation)",
        // iPad
        @"iPad1,1" : @"iPad",
        @"iPad2,1" : @"iPad 2",
        @"iPad2,2" : @"iPad 2",
        @"iPad2,3" : @"iPad 2",
        @"iPad2,4" : @"iPad 2",
        @"iPad3,1" : @"iPad (3rd generation)",
        @"iPad3,2" : @"iPad (3rd generation)",
        @"iPad3,3" : @"iPad (3rd generation)",
        @"iPad3,4" : @"iPad (4th generation)",
        @"iPad3,5" : @"iPad (4th generation)",
        @"iPad3,6" : @"iPad (4th generation)",
        @"iPad6,11" : @"iPad (5th generation)",
        @"iPad6,12" : @"iPad (5th generation)",
        @"iPad7,5" : @"iPad (6th generation)",
        @"iPad7,6" : @"iPad (6th generation)",
        @"iPad7,11" : @"iPad (7th generation)",
        @"iPad7,12" : @"iPad (7th generation)",
        @"iPad11,6" : @"iPad (8th generation)",
        @"iPad11,7" : @"iPad (8th generation)",
        @"iPad12,1" : @"iPad (9th generation)",
        @"iPad12,2" : @"iPad (9th generation)",
        @"iPad4,1" : @"iPad Air",
        @"iPad4,2" : @"iPad Air",
        @"iPad4,3" : @"iPad Air",
        @"iPad5,3" : @"iPad Air 2",
        @"iPad5,4" : @"iPad Air 2",
        @"iPad11,3" : @"iPad Air (3rd generation)",
        @"iPad11,4" : @"iPad Air (3rd generation)",
        @"iPad13,1" : @"iPad Air (4th generation)",
        @"iPad13,2" : @"iPad Air (4th generation)",
        @"iPad13,16" : @"iPad Air (5th generation)",
        @"iPad13,17" : @"iPad Air (5th generation)",
        @"iPad6,7" : @"iPad Pro (12.9-inch)",
        @"iPad6,8" : @"iPad Pro (12.9-inch)",
        @"iPad6,3" : @"iPad Pro (9.7-inch)",
        @"iPad6,4" : @"iPad Pro (9.7-inch)",
        @"iPad7,1" : @"iPad Pro (12.9-inch) (2nd generation)",
        @"iPad7,2" : @"iPad Pro (12.9-inch) (2nd generation)",
        @"iPad7,3" : @"iPad Pro (10.5-inch)",
        @"iPad7,4" : @"iPad Pro (10.5-inch)",
        @"iPad8,1" : @"iPad Pro (11-inch)",
        @"iPad8,2" : @"iPad Pro (11-inch)",
        @"iPad8,3" : @"iPad Pro (11-inch)",
        @"iPad8,4" : @"iPad Pro (11-inch)",
        @"iPad8,5" : @"iPad Pro (12.9-inch) (3rd generation)",
        @"iPad8,6" : @"iPad Pro (12.9-inch) (3rd generation)",
        @"iPad8,7" : @"iPad Pro (12.9-inch) (3rd generation)",
        @"iPad8,8" : @"iPad Pro (12.9-inch) (3rd generation)",
        @"iPad8,9" : @"iPad Pro (11-inch) (2nd generation)",
        @"iPad8,10" : @"iPad Pro (11-inch) (2nd generation)",
        @"iPad8,11" : @"iPad Pro (12.9-inch) (4th generation)",
        @"iPad8,12" : @"iPad Pro (12.9-inch) (4th generation)",
        @"iPad13,4" : @"iPad Pro (11-inch) (3rd generation)",
        @"iPad13,5" : @"iPad Pro (11-inch) (3rd generation)",
        @"iPad13,6" : @"iPad Pro (11-inch) (3rd generation)",
        @"iPad13,7" : @"iPad Pro (11-inch) (3rd generation)",
        @"iPad13,8" : @"iPad Pro (12.9-inch) (5th generation)",
        @"iPad13,9" : @"iPad Pro (12.9-inch) (5th generation)",
        @"iPad13,10" : @"iPad Pro (12.9-inch) (5th generation)",
        @"iPad13,11" : @"iPad Pro (12.9-inch) (5th generation)",
        @"iPad2,5" : @"iPad mini",
        @"iPad2,6" : @"iPad mini",
        @"iPad2,7" : @"iPad mini",
        @"iPad4,4" : @"iPad mini 2",
        @"iPad4,5" : @"iPad mini 2",
        @"iPad4,6" : @"iPad mini 2",
        @"iPad4,7" : @"iPad mini 3",
        @"iPad4,8" : @"iPad mini 3",
        @"iPad4,9" : @"iPad mini 3",
        @"iPad5,1" : @"iPad mini 4",
        @"iPad5,2" : @"iPad mini 4",
        @"iPad11,1" : @"iPad mini (5th generation)",
        @"iPad11,2" : @"iPad mini (5th generation)",
        @"iPad14,1" : @"iPad mini (6th generation)",
        @"iPad14,2" : @"iPad mini (6th generation)",
        // 其他
        @"i386" : @"iPhone Simulator",
        @"x86_64" : @"iPhone Simulator",
    };
}