i can't help you since you did not post any code, but here is a working copy of a MailComposeController on iOS9, using it in my app without any problem. Important set your class conform to MFMailComposeViewControllerDelegate. Note that sendMail method is related to a button in my project
@IBAction func sendMail(sender: AnyObject) {
let mailComposeViewController = configuredMailComposeViewController()
if MFMailComposeViewController.canSendMail() {
self.presentViewController(mailComposeViewController, animated: true, completion: nil)
} else {
self.showSendMailErrorAlert()
}
}
func configuredMailComposeViewController() -> MFMailComposeViewController {
let mailComposerVC = MFMailComposeViewController()
mailComposerVC.mailComposeDelegate = self
mailComposerVC.setToRecipients(["yourMail@goesHere"])
return mailComposerVC
}
func showSendMailErrorAlert() {
print("There was an error.")
//In case of error with email account on device, you should implement an alert here
}
func mailComposeController(controller: MFMailComposeViewController, didFinishWithResult result: MFMailComposeResult, error: NSError?) {
controller.dismissViewControllerAnimated(true, completion: nil)
}