实例成员'jpegData'不能用于'UIImage'类型

Question

我收到此错误“实例成员'jpegData'不能用于'UIImage'类型；您是要使用此类型的值吗？”

@IBAction func saveButtonWasPressed(_ sender: UIBarButtonItem) {
    if NoteNameLabel.text == "" || NoteNameLabel.text == "NOTE NAME" || noteDescriptionLabel.text == "" || noteDescriptionLabel.text == "Note Description..." {

        let alertController = UIAlertController(title: "Missing Information", message:"You left one or more fields empty. Please make sure that all fields are filled before attempting to save.", preferredStyle: UIAlertController.Style.alert)
        let OKAction = UIAlertAction(title: "Dismiss", style: UIAlertAction.Style.default, handler: nil)

        alertController.addAction(OKAction)

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

    }

    else {
        if (isExesting == false) {
            let noteName = NoteNameLabel.text
            let noteDescription = noteDescriptionLabel.text

            if let moc = managedObjectContext {
                let note = Note(context: moc)

                if let data: Data = UIImage.jpegData(compressionQuality: 1.0) {
                    note.noteImage = data as NSData as Data
                }

                note.noteName = noteName
                note.noteDescription = noteDescription

                saveToCoreData() {

                    let isPresentingInAddFluidPatientMode = self.presentingViewController is UINavigationController

                    if isPresentingInAddFluidPatientMode {
                        self.dismiss(animated: true, completion: nil)

                    }

                    else {
                        self.navigationController!.popViewController(animated: true)

                    }

                }

            }

        }

        else if (isExesting == true) {

            let note = self.note

            let managedObject = note
            managedObject!.setValue(NoteNameLabel.text, forKey: "noteName")
            managedObject!.setValue(noteDescriptionLabel.text, forKey: "noteDescription")

            if let data: Data = UIImage.jpegData(compressionQuality: 1.0) {
                managedObject!.setValue(data, forKey: "noteImage")
            }

            do {
                try context.save()

我尝试使用UIImage类的jpegData（compressionQuality :)和pngData（）实例方法，如文档所述，我可以但仍然有错误