Compose mail swift message

Here is an example of a Swift message that composes an email:

import UIKit
import MessageUI

class ViewController: UIViewController, MFMailComposeViewControllerDelegate {

    @IBAction func sendEmail(_ sender: UIButton) {
        let mailComposerVC = MFMailComposeViewController()
        mailComposerVC.delegate = self
        mailComposerVC.setSubject("Test Email")
        mailComposerVC.setMessageBody("This is a test email", isHTML: false)
        mailComposerVC.addAttachmentData(Data(), mimeType: "text/plain", fileName: "attachment.txt")

        if MFMailComposeViewController.canSendMail() {
            self.present(mailComposerVC, animated: true, completion: nil)
        } else {
            print("Mail services are not available")
        }
    }

    func mailComposeController(_ controller: MFMailComposeViewController, didFinishWith result: MFMailComposeResult, error: Error?) {
        switch result {
        case.sent:
            print("Email sent successfully")
        case.failed:
            print("Email failed to send")
        case.cancelled:
            print("Email cancelled")
        default:
            print("Email not sent")
        }
        controller.dismiss(animated: true, completion: nil)
    }
}

This code creates a MFMailComposeViewController instance and sets its subject, message body, and attachment. It then presents the mail composer view controller modally.

The mailComposeController(_:didFinishWith:erro:) method is called when the user finishes composing the email. It handles the result of the email sending operation and dismisses the mail composer view controller.

Note that this code assumes that the app has the necessary permissions to send emails. You may need to add the NSMailComposeViewController key to your app's Info.plist file to request these permissions.

Also, this code uses the MFMailComposeViewController class, which is part of the MessageUI framework. You need to import this framework in your Swift file to use this class.

You can customize the email composition by using the following methods:

You can also customize the appearance of the mail composer view controller by using the following methods: