[英]MFMailComposeViewController delegate not working on swift 4
我正在嘗試關閉MFMailComposeViewController,但是未觸發委托。 看來這是一個普遍的問題,答案是相同的,但是它們對我不起作用:(。我有一個按鈕調用該函數來發送郵件。我首先創建一個csv文件,然后創建MFMailComposeViewController並附加csv文件到郵件,有時會發送郵件(此后郵件視圖控制器不會關閉),並且“取消”按鈕向我顯示了刪除或保存草稿的選項,但此后什么都沒有發生。
這是按鈕的代碼:
import UIKit
import MessageUI
class UserInfoViewController: UIViewController, MFMailComposeViewControllerDelegate {
@IBAction func uploadPressed(_ sender: Any) {
let contentsOfFile = "Name,ID,Age,Sex,Time,\n\(name),\(id),\(age),\(sex),\(time)"
let data = contentsOfFile.data(using: String.Encoding.utf8, allowLossyConversion: false)
if let content = data {
print("NSData: \(content)")
}
func configuredMailComposeViewController() -> MFMailComposeViewController {
let emailController = MFMailComposeViewController()
//emailController.mailComposeDelegate = self as? MFMailComposeViewControllerDelegate
emailController.mailComposeDelegate = self
emailController.setToRecipients([""])
emailController.setSubject("CSV File")
emailController.setMessageBody("", isHTML: false)
emailController.addAttachmentData(data!, mimeType: "text/csv", fileName: "registro.csv")
return emailController
}
let emailViewController = configuredMailComposeViewController()
if MFMailComposeViewController.canSendMail() {
self.present(emailViewController, animated: true, completion: nil)
}
func mailComposeController(_ controller: MFMailComposeViewController, didFinishWith result: MFMailComposeResult, error: Error?) {
print("Delegate worked!")
controller.dismiss(animated: true, completion: nil)
}
}
}
提前非常感謝您。
您的問題是由於將委托方法放在另一個方法中引起的。 你不能那樣做。 委托功能必須位於類的頂層。 只需將您的mailComposeController(_:didFinishWith:error:)
函數移出uploadPressed
函數即可。
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