发短信，

- (void)sendMessage

{

    if ([MFMessageComposeViewControllercanSendText]) {

        MFMessageComposeViewController *picker = [[MFMessageComposeViewControlleralloc] init];

        picker.messageComposeDelegate = self;

        NSLog(@"info.long code:%@", self.activityInfo.longcode);

        picker.recipients = [NSArray arrayWithObject:[NSString stringWithFormat:@"%@", self.activityInfo.longcode]];

        [self.navigationControllerpresentModalViewController: picker animated:YES];

    }

    else {

        UIAlertView* alert = [[UIAlertViewalloc] initWithTitle:@"提示"message:@"您的设备不能发送短信！" delegate:selfcancelButtonTitle:@"确定"otherButtonTitles:nil, nil];

        [alert show];

    }

}