static KeychainItemWrapper * s_pWrapper = Nil;

// 获取开发者的ID

NSString * getAppID() {

  NSDictionary *query = [NSDictionary dictionaryWithObjectsAndKeys:

      (id)kSecClassGenericPassword, kSecClass,

      @"bundleSeedID", kSecAttrAccount,

      @"", kSecAttrService,

      (id)kCFBooleanTrue, kSecReturnAttributes,

      nil];

  CFDictionaryRef result = nil;

  OSStatus status = SecItemCopyMatching((CFDictionaryRef)query, (CFTypeRef *)&result);

  if (status == errSecItemNotFound)

      status = SecItemAdd((CFDictionaryRef)query, (CFTypeRef *)&result);

  if (status != errSecSuccess)

      return nil;

  NSString *accessGroup = [(NSDictionary *)result objectForKey:(id)kSecAttrAccessGroup];

  NSArray *components = [accessGroup componentsSeparatedByString:@"."];

  NSString *bundleSeedID = [[components objectEnumerator] nextObject];

  CFRelease(result);

  return bundleSeedID;

}

// 获取设备唯一ID

std::string getUniqueID()

{

  if (s_pWrapper == Nil) {

#if TARGET_IPHONE_SIMULATOR

    s_pWrapper = [[KeychainItemWrapper alloc] initWithIdentifier:@"YourAPP"

    accessGroup:Nil];

#else

    NSString* boundSeedID = getAppID();

    NSString* appID = @".com.YourCompany.YourAPP";

    NSString* groupID = [boundSeedID stringByAppendingString:appID];

    s_pWrapper = [[KeychainItemWrapper alloc] initWithIdentifier:@"YourAPP"

    accessGroup:groupID];

#endif

  // [s_pWrapper resetKeychainItem];

  }

  // 是否已注册过

  NSString *key = [s_pWrapper objectForKey:(id)kSecValueData];

  if (key != Nil && key.length > ) {

      return [key UTF8String];

  }

  // 7.0系统取IDFV作为唯一标示

  NSUUID* uuid = [[UIDevice currentDevice] identifierForVendor];

  key = [uuid UUIDString];

  // 注册到keychain中

  [s_pWrapper setObject:(id)key forKey:(id)kSecAttrAccount];

  [s_pWrapper setObject:(id)key forKey:(id)kSecAttrService];

  [s_pWrapper setObject:(id)key forKey:(id)kSecValueData];

  return [key UTF8String];

}