//获得设备型号

 + (NSString *)getCurrentDeviceModel:(UIViewController *)controller

 {

     int mib[];

     size_t len;

     char *machine;

     mib[] = CTL_HW;

     mib[] = HW_MACHINE;

     sysctl(mib, , NULL, &len, NULL, );

     machine = malloc(len);

     sysctl(mib, , machine, &len, NULL, );

     NSString *platform = [NSString stringWithCString:machine encoding:NSASCIIStringEncoding];

     free(machine);

     if ([platform isEqualToString:@"iPhone1,1"]) return @"iPhone 2G (A1203)";

     if ([platform isEqualToString:@"iPhone1,2"]) return @"iPhone 3G (A1241/A1324)";

     if ([platform isEqualToString:@"iPhone2,1"]) return @"iPhone 3GS (A1303/A1325)";

     if ([platform isEqualToString:@"iPhone3,1"]) return @"iPhone 4 (A1332)";

     if ([platform isEqualToString:@"iPhone3,2"]) return @"iPhone 4 (A1332)";

     if ([platform isEqualToString:@"iPhone3,3"]) return @"iPhone 4 (A1349)";

     if ([platform isEqualToString:@"iPhone4,1"]) return @"iPhone 4S (A1387/A1431)";

     if ([platform isEqualToString:@"iPhone5,1"]) return @"iPhone 5 (A1428)";

     if ([platform isEqualToString:@"iPhone5,2"]) return @"iPhone 5 (A1429/A1442)";

     if ([platform isEqualToString:@"iPhone5,3"]) return @"iPhone 5c (A1456/A1532)";

     if ([platform isEqualToString:@"iPhone5,4"]) return @"iPhone 5c (A1507/A1516/A1526/A1529)";

     if ([platform isEqualToString:@"iPhone6,1"]) return @"iPhone 5s (A1453/A1533)";

     if ([platform isEqualToString:@"iPhone6,2"]) return @"iPhone 5s (A1457/A1518/A1528/A1530)";

     if ([platform isEqualToString:@"iPhone7,1"]) return @"iPhone 6 Plus (A1522/A1524)";

     if ([platform isEqualToString:@"iPhone7,2"]) return @"iPhone 6 (A1549/A1586)";

     if ([platform isEqualToString:@"iPod1,1"])   return @"iPod Touch 1G (A1213)";

     if ([platform isEqualToString:@"iPod2,1"])   return @"iPod Touch 2G (A1288)";

     if ([platform isEqualToString:@"iPod3,1"])   return @"iPod Touch 3G (A1318)";

     if ([platform isEqualToString:@"iPod4,1"])   return @"iPod Touch 4G (A1367)";

     if ([platform isEqualToString:@"iPod5,1"])   return @"iPod Touch 5G (A1421/A1509)";

     if ([platform isEqualToString:@"iPad1,1"])   return @"iPad 1G (A1219/A1337)";

     if ([platform isEqualToString:@"iPad2,1"])   return @"iPad 2 (A1395)";

     if ([platform isEqualToString:@"iPad2,2"])   return @"iPad 2 (A1396)";

     if ([platform isEqualToString:@"iPad2,3"])   return @"iPad 2 (A1397)";

     if ([platform isEqualToString:@"iPad2,4"])   return @"iPad 2 (A1395+New Chip)";

     if ([platform isEqualToString:@"iPad2,5"])   return @"iPad Mini 1G (A1432)";

     if ([platform isEqualToString:@"iPad2,6"])   return @"iPad Mini 1G (A1454)";

     if ([platform isEqualToString:@"iPad2,7"])   return @"iPad Mini 1G (A1455)";

     if ([platform isEqualToString:@"iPad3,1"])   return @"iPad 3 (A1416)";

     if ([platform isEqualToString:@"iPad3,2"])   return @"iPad 3 (A1403)";

     if ([platform isEqualToString:@"iPad3,3"])   return @"iPad 3 (A1430)";

     if ([platform isEqualToString:@"iPad3,4"])   return @"iPad 4 (A1458)";

     if ([platform isEqualToString:@"iPad3,5"])   return @"iPad 4 (A1459)";

     if ([platform isEqualToString:@"iPad3,6"])   return @"iPad 4 (A1460)";

     if ([platform isEqualToString:@"iPad4,1"])   return @"iPad Air (A1474)";

     if ([platform isEqualToString:@"iPad4,2"])   return @"iPad Air (A1475)";

     if ([platform isEqualToString:@"iPad4,3"])   return @"iPad Air (A1476)";

     if ([platform isEqualToString:@"iPad4,4"])   return @"iPad Mini 2G (A1489)";

     if ([platform isEqualToString:@"iPad4,5"])   return @"iPad Mini 2G (A1490)";

     if ([platform isEqualToString:@"iPad4,6"])   return @"iPad Mini 2G (A1491)";

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

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

     return platform;

 }