Email

UIViewController+Email.swift

import UIKit
import MessageUI

extension UIViewController : MFMailComposeViewControllerDelegate, MFMessageComposeViewControllerDelegate, UINavigationControllerDelegate {
    
    func sendEmail(_ to: [String], defaultSubject: String, defaultBody: String, _ completion : ((_ result: MFMailComposeResult) -> Void)? = nil) {
        if MFMailComposeViewController.canSendMail() {
            let mail = MFMailComposeViewController()
            mail.mailComposeDelegate = self
            mail.setToRecipients(to)
            mail.setMessageBody(defaultBody, isHTML: true)
            mail.setSubject(defaultSubject)
            
            present(mail, animated: true)
        } else {
            self.alert("Mail is not available on this device.")
        }
    }
    
    func sendText(_ to: [String], defaultBody: String, _ completion : ((_ result: MessageComposeResult) -> Void)? = nil) {
        
        guard MFMessageComposeViewController.canSendText() else {
            self.alert("SMS is not available on this device.")
            return
        }
        
        let controller = MFMessageComposeViewController()
        controller.body = "Message Body"
        controller.recipients = to
        controller.delegate = self
        controller.messageComposeDelegate = self
        self.present(controller, animated: true, completion: nil)
    }
    
    // MARK: - Mail Delegate -
    public func mailComposeController(_ controller: MFMailComposeViewController, didFinishWith result: MFMailComposeResult, error: Error?) {
        controller.dismiss(animated: true, completion: nil)
    }
    
    // MARK: - Message Delegate -
    
    public func messageComposeViewController(_ controller: MFMessageComposeViewController, didFinishWith result: MessageComposeResult) {
        //... handle sms screen actions
        controller.dismiss(animated: true, completion: nil)
    }
    
}