How to get editable text in MFMessageComposeViewController

Question

How to get edited text message in MFMessageComposeViewController

if ([MFMessageComposeViewController canSendText]) {
    // for appear message view
    MFMessageComposeViewController *messageVC = [[MFMessageComposeViewController alloc] init];
    messageVC.messageComposeDelegate = self;
    messageVC.body = messageString;
    messageVC.recipients = @[@"53645454", @"5445454545"];

    // prepare message view for send Message
    [self presentViewController:messageVC animated:NO completion:NULL];
}