获取IOS硬件设备的型号

/*
*  获取版本型号
*  "i386"          simulator
*  "iPod1,1"       iPod Touch
*  "iPhone1,1"     iPhone
*  "iPhone1,2"     iPhone 3G
*  "iPhone2,1"     iPhone 3GS
*  "iPad1,1"       iPad
*  "iPhone3,1"     iPhone 4
*/
+(NSString *)deviceString;

+(NSString*)deviceString
{
struct utsname systemInfo;
uname(&systemInfo);
NSString *deviceString = [NSString stringWithCString:systemInfo.machine encoding:NSUTF8StringEncoding];

if ([deviceString isEqualToString:@"iPhone1,1"])    return @"iPhone 1G";
if ([deviceString isEqualToString:@"iPhone1,2"])    return @"iPhone 3G";
if ([deviceString isEqualToString:@"iPhone2,1"])    return @"iPhone 3GS";
if ([deviceString isEqualToString:@"iPhone3,1"])    return @"iPhone 4";
if ([deviceString isEqualToString:@"iPhone3,2"])    return @"Verizon iPhone 4";
if ([deviceString isEqualToString:@"iPod1,1"])      return @"iPod Touch 1G";
if ([deviceString isEqualToString:@"iPod2,1"])      return @"iPod Touch 2G";
if ([deviceString isEqualToString:@"iPod3,1"])      return @"iPod Touch 3G";
if ([deviceString isEqualToString:@"iPod4,1"])      return @"iPod Touch 4G";
if ([deviceString isEqualToString:@"iPad1,1"])      return @"iPad";
if ([deviceString isEqualToString:@"iPad2,1"])      return @"iPad 2 (WiFi)";
if ([deviceString isEqualToString:@"iPad2,2"])      return @"iPad 2 (GSM)";
if ([deviceString isEqualToString:@"iPad2,3"])      return @"iPad 2 (CDMA)";
if ([deviceString isEqualToString:@"i386"])         return @"Simulator";
if ([deviceString isEqualToString:@"x86_64"])       return @"Simulator";

DLog(@"NOTE: Unknown device type: %@", deviceString);
return deviceString;
}