Mfmailcomposeviewcontroller

MFMailComposeViewController is a class in iOS that allows you to compose and send email messages from your app. It's a part of the MessageUI framework.

Here are some key features and methods of MFMailComposeViewController:

Initialization

To use MFMailComposeViewController, you need to create an instance of it and set its mailComposeDelegate property to your view controller. This delegate will receive notifications when the user finishes composing the email.

let mailComposer = MFMailComposeViewController()
mailComposer.mailComposeDelegate = self

Setting Up the Email

You can set various properties of the email using the following methods:

• setSubject: sets the subject of the email
• setBody: sets the body of the email
• addAttachmentData: adds an attachment to the email
• addRecipient: adds a recipient to the email

Here's an example:

mailComposer.setSubject("Test Email")
mailComposer.setBody("This is a test email")
let attachment = UIImagePNGRepresentation(UIImage(named: "image.png"))
mailComposer.addAttachmentData(attachment!, mimeType: "image/png", fileName: "image.png")
mailComposer.addRecipient("[email protected]")

Presenting the Email Composer

Once you've set up the email, you can present the composer using the present method:

self.present(mailComposer, animated: true, completion: nil)

Handling the Email Composition

The MFMailComposeViewControllerDelegate protocol provides several methods that you can implement to handle the email composition process. These methods include:

• mailComposeController(_:didFinishWithResult:completionHandler:): called when the user finishes composing the email
• mailComposeController(_:didCancel:): called when the user cancels the email composition
• mailComposeController(_:subjectFieldHasChanged:): called when the user changes the subject of the email

Here's an example implementation of the mailComposeController(_:didFinishWithResult:completionHandler:) method:

func mailComposeController(_ controller: MFMailComposeViewController, didFinishWithResult result: MFMailComposeResult, completionHandler: @escaping () -> Void) {
    switch result {
    case.sent:
        print("Email sent successfully")
    case.failed:
        print("Email failed to send")
    case.cancelled:
        print("Email composition cancelled")
    }
    controller.dismiss(animated: true, completion: nil)
}