Sending SMS in iOS with Swift

Not sure if you really got the answer. I was in a similar hunt and came across this solution and got it to work.

import UIKitimport MessageUIclass ViewController: UIViewController, MFMessageComposeViewControllerDelegate {    @IBOutlet weak var phoneNumber: UITextField!    override func viewDidLoad() {        super.viewDidLoad()    }    @IBAction func sendText(sender: UIButton) {        if (MFMessageComposeViewController.canSendText()) {            let controller = MFMessageComposeViewController()            controller.body = "Message Body"            controller.recipients = [phoneNumber.text]            controller.messageComposeDelegate = self            self.presentViewController(controller, animated: true, completion: nil)        }    }    func messageComposeViewController(controller: MFMessageComposeViewController!, didFinishWithResult result: MessageComposeResult) {        //... handle sms screen actions        self.dismissViewControllerAnimated(true, completion: nil)    }    override func viewWillDisappear(animated: Bool) {        self.navigationController?.navigationBarHidden = false    }}

Swift 3.0 Solution:

func sendSMSText(phoneNumber: String) {        if (MFMessageComposeViewController.canSendText()) {            let controller = MFMessageComposeViewController()            controller.body = ""            controller.recipients = [phoneNumber]            controller.messageComposeDelegate = self            self.present(controller, animated: true, completion: nil)        }    }    func messageComposeViewController(_ controller: MFMessageComposeViewController, didFinishWith result: MessageComposeResult) {        //... handle sms screen actions        self.dismiss(animated: true, completion: nil)    }    override func viewWillDisappear(_ animated: Bool) {        self.navigationController?.isNavigationBarHidden = false    }

For sending iMessage in Swift 5 I use following code

Just MessageUI package and implement MFMessageComposeViewControllerDelegate

import UIKitimport MessageUIclass ViewController: UIViewController, MFMessageComposeViewControllerDelegate {    override func viewDidLoad() {        super.viewDidLoad()    }    @IBAction func sendNewIMessage(_ sender: Any) {        let messageVC = MFMessageComposeViewController()        messageVC.body = "Enter a message details here";        messageVC.recipients = ["recipients_number_here"]        messageVC.messageComposeDelegate = self        self.present(messageVC, animated: true, completion: nil)    }    func messageComposeViewController(_ controller: MFMessageComposeViewController, didFinishWith result: MessageComposeResult) {        switch (result) {        case .cancelled:            print("Message was cancelled")        case .failed:            print("Message failed")        case .sent:            print("Message was sent")        default:            return        }        dismiss(animated: true, completion: nil)    }}