MFMailComposeViewController wrapped for SwiftUI

MailComposeView.swift

//
//  MailComposeView.swift
//
//  Created by Mathijs Bernson on 08/03/2022.
//  Copyright © 2022 Q42. All rights reserved.
//

import SwiftUI
import MessageUI

struct MailComposeView: UIViewControllerRepresentable {
  let subject: String
  let toRecipients: [String]
  let body: String
  @Environment(\.dismiss) private var dismiss

  static var canSendMail: Bool {
    MFMailComposeViewController.canSendMail()
  }

  func makeUIViewController(context: Context) -> MFMailComposeViewController {
    let controller = MFMailComposeViewController()
    controller.setSubject(subject)
    controller.setToRecipients(toRecipients)
    controller.setMessageBody(body, isHTML: false)
    controller.mailComposeDelegate = context.coordinator
    return controller
  }

  func updateUIViewController(_ uiViewController: MFMailComposeViewController, context: Context) {
    // We don't update the MFMailComposeViewController
  }

  func makeCoordinator() -> Coordinator {
    Coordinator(dismiss: dismiss)
  }

  class Coordinator: NSObject, MFMailComposeViewControllerDelegate {
    private var dismiss: DismissAction

    init(dismiss: DismissAction) {
      self.dismiss = dismiss
    }

    func mailComposeController(_ controller: MFMailComposeViewController, didFinishWith result: MFMailComposeResult, error: Error?) {
      dismiss()
    }
  }
}

SupportView.swift

//
//  SupportView.swift
//
//  Created by Mathijs Bernson on 09/03/2022.
//  Copyright © 2022 Q42. All rights reserved.
//

import SwiftUI

struct SupportView: View {
  @State var emailRecipient = "info@q42.nl"
  @State var emailSubject = "This is the subject"
  @State var emailBody = "This is the body"

  @State var isPresentingMailSheet = false

  var body: some View {
    if MailComposeView.canSendMail {
      Button("Send us an email") {
        isPresentingMailSheet = true
      }
      .sheet(isPresented: $isPresentingMailSheet) {
        MailComposeView(
          subject: emailSubject,
          toRecipients: [emailRecipient],
          body: emailBody
        )
      }
    } else {
      Text("This device cannot send mail.")
    }
  }
}

struct SupportView_Previews: PreviewProvider {
  static var previews: some View {
    SupportView()
  }
}