在 segue 中使用 class 时遇到问题

Question

试图让 'edit' VC 传回 'display' VC 用户通过 Storyboard segue 更新但难以存储的新信息用户输入我初始化的 class 'Event'

我一直收到这个错误

Cannot invoke initializer for type 'Event' with an argument list of type '(eventName: String, eventLocation: String, eventStart: String, eventDescription: String, eventHost: String)'

我的编辑（来源）VC（准备...时出错）

class EditEventDetailTableViewController: UITableViewController {

@IBOutlet weak var imageView: UIImageView!
@IBOutlet weak var eventName: UITextField!
@IBOutlet weak var eventStartDate: UITextField!
@IBOutlet weak var eventLocation: UITextField!
@IBOutlet weak var eventDescription: UITextView!
@IBOutlet weak var eventHost: UITextField!

var event:Event?
var eventUpdate:Event?

override func viewDidLoad() {
    super.viewDidLoad()

    //imageView.image = detail?.photo
    eventName.text = event?.eventName
    eventStartDate.text = event?.eventStart
    eventLocation.text = event?.eventLocation
    eventDescription.text = event?.eventDescription
    eventHost.text = event?.eventHost

    guard let urlString = (event?.eventCoverUrl) else { return  }
    let url = URL(string: urlString)
         guard url != nil else {
             //Couldn't create url object
             return
         }
    self.imageView.sd_setImage(with: url) { (image, error, cacheType, url) in
        self.imageView.image = image
    }
}

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {


   if let eventName = eventName.text?.trimmingCharacters(in: .whitespacesAndNewlines),
       let eventStart = eventStartDate.text?.trimmingCharacters(in: .whitespacesAndNewlines),
       let eventLocation = eventLocation.text?.trimmingCharacters(in: .whitespacesAndNewlines),
       let eventDescription = eventDescription.text?.trimmingCharacters(in: .whitespacesAndNewlines),
       let eventHost = eventHost.text?.trimmingCharacters(in: .whitespacesAndNewlines) {
    self.event = Event(eventName: eventName, eventLocation: eventLocation, eventStart: eventStart, eventDescription: eventDescription, eventHost: eventHost)
   }}}

这是我的 class

class Event {

var adminUser:String?
var eventCreated:Date?
var eventId:String?
var eventName:String?
var eventCoverUrl:String?
var eventLocation:String?
var eventStart:String?
var eventEnd:Date?
var eventStatus:String?
//var eventParticipants: [String?]
var eventDescription:String?
var eventDeleteDate:Date?
var eventHost:String?


init?(snapshot:DocumentSnapshot){

    self.eventId = snapshot.get("eventId") as? String ?? "No event Id"
    self.adminUser = snapshot.get("adminUser") as? String ?? "No admin user"
    //self.eventCreated = snapshot.get("eventCreated") as? Date ?? "No Event Created Date"
    self.eventName = snapshot.get("eventName") as? String ?? "No Event Name"
    self.eventCoverUrl = snapshot.get("eventCoverUrl") as? String ?? "No Cover URL"
    self.eventLocation = snapshot.get("eventLocation") as? String ?? "No Location"
    self.eventStart = snapshot.get("eventStart") as? String ?? "No Start Date"
    self.eventDescription = snapshot.get("eventDescription") as? String ?? "No Event Description"
    self.eventHost = snapshot.get("eventHost") as? String ?? "No Event Host"
    self.eventStatus = snapshot.get("eventStatus") as? String ?? "No Event Status"

}

init(adminUser:String?, eventId:String?, eventName:String?, eventCoverUrl:String?, eventLocation:String?, eventStart:String?, eventStatus:String?, eventDescription:String?, eventHost:String?) {

    self.adminUser = adminUser ?? "No \(LocalizedError.self)"
    self.eventId = eventId ?? "No \(LocalizedError.self)"
    self.eventName = eventName ?? "No \(LocalizedError.self)"
    self.eventCoverUrl = eventCoverUrl ?? "No \(LocalizedError.self)"
    self.eventLocation = eventLocation ?? "No \(LocalizedError.self)"
    self.eventStart = eventStart ?? "No \(LocalizedError.self)"
    self.eventStatus = eventStatus ?? "No \(LocalizedError.self)"
    self.eventDescription = eventDescription ?? "No \(LocalizedError.self)"
    self.eventHost = eventHost ?? "No \(LocalizedError.self)"
}
}

我已经尝试了很多方法，但没有任何方法可以让我接受编辑字段的用户输入来创建一个 'event'，然后通过已经存在的 unwind segue 将其传递到我的显示（目标）VC正在工作。

这是事件 class 的更新代码，更新后的参数初始化为空字符串。其他的都和上面一样。

var adminUser = ""
var eventCreated = ""
var eventId = ""
var eventName = ""
var eventCoverUrl = ""
var eventLocation = ""
var eventStart = ""
var eventEnd:Date?
var eventStatus:String?
//var eventParticipants: [String?]
var eventDescription = ""
var eventDeleteDate = ""
var eventHost = ""

Answer 1

您不能在函数调用中遗漏参数。 Event(eventName, eventLocation, eventStart, eventDescription, eventHost) 未定义，因为实际方法是 Event(adminUser, eventId, eventName, eventCoverUrl, eventLocation, eventStart, eventStatus, eventDescription, eventHost) 您需要将 prepareForSegue 中的最后一行更改为：

self.event = Event(adminUser: adminUser, eventId: eventId, eventName: eventName, eventCoverUrl: eventCoverUrl, eventLocation: eventLocation, eventStart: eventStart, eventStatus:eventStatus, eventDescription: eventDescription, eventHost: eventHost)

在 segue 中使用 class 时遇到问题

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