无法将类型'__NSSingleObjectArrayI'（0x10afea608）的值强制转换为'NSDictionary'（0x10afeb288）。船头1：在Alamofire中发出信号SIGABRT

Question

我使用 Alamofire 创建了APIService，当我使用 print函数在控制台中显示内容时，我成功从下面的代码行中获取了值。

if let passcodeJSON = response.result.value { let passcodeObj = passcodeJSON as! [String : Any]

但是参考下面的图片，我的代码中出现了线程1：信号SIGABRT ，并且无法将类型'__NSSingleObjectArrayI'（0x10afea608）的值强制转换为'NSDictionary'（0x10afeb288） 。

如何解决此问题？我找不到适用于我的问题的解决方案。希望你能给我一部分时间。谢谢。

APIService

  func validatePasscode(passcode: String, completion: @escaping (Event?) -> Void)
  {
   if let passcodeURL = URL (string: "\(PASSCODE_CHECKER_URL)/\(passcode)") {


    Alamofire.request(passcodeURL, method: .get).responseJSON { (response) in

            if let passcodeJSON = response.result.value {
                let passcodeObj = passcodeJSON as! [String : Any]

                let eventIDObj = passcodeObj["event_id"] as! [String : Any]
                let event = Event.init(JSON: eventIDObj)
                completion(event)
            }else {
                completion(nil)
        }
            }
      print("Loading from web.....")
        }
    }

    }

Event.swift

class Event {

let id: String?
let name: String?
let location: String?
let startDateTime: Date?
let endDateTime: String?
let deleteFlag: Bool?
let deleteDateTime: String?
let dateCreated: String?
let hasRaffle: Bool?
let registrationReq: Bool?
let participantCount: Int
let closedFlag: Bool?
let closedDateTime: String?
let reopenFlag: Bool?
let reopenDateTime: String?


init?(JSON: [String: Any]) {

    guard let eventID = JSON["event_id"] as? String,
        let eventName = JSON["event_name"] as? String,
        let eventLocation = JSON["event_location"] as? String,
        let startDateTime = JSON["start_datetime"] as? String,
        let endDateTime = JSON["end_datetime"] as? String,
        let participantCount = JSON["participant_count"] as? Int else {

            return nil
    }

    self.id = eventID
    self.name = eventName
    self.location = eventLocation
    self.endDateTime = endDateTime
    self.participantCount = participantCount

    if let formattedStartDateTime = getDateFromString(dateString: startDateTime, formatString: "yyyy-MM-dd'T'HH:mm:ss.SSS") {
        self.startDateTime = formattedStartDateTime
    }else {
        self.startDateTime = Date()
    }

    if let deleteFlag = JSON["delete_flag"] as? Bool {
        self.deleteFlag = deleteFlag
    }else {
        self.deleteFlag = nil
    }

    if let deletedDateTime = JSON["deleted_datetime"] as? String {
        self.deleteDateTime = deletedDateTime
    }else {
        self.deleteDateTime = nil
    }

    if let dateCreated = JSON["date_created"] as? String {
        self.dateCreated = dateCreated
    }else {
        self.dateCreated = nil
    }

    if let hasRaffle = JSON["hasRaffle"] as? Bool {
        self.hasRaffle = hasRaffle
    }else {
        self.hasRaffle = nil
    }

    if let registrationReq = JSON["registration_req"] as? Bool {
        self.registrationReq = registrationReq
    }else {
        self.registrationReq = nil
    }

    if let closedFlag = JSON["closed_flag"] as? Bool {
        self.closedFlag = closedFlag
    }else {
        self.closedFlag = nil
    }

    if let closedDateTime = JSON["closed_datetime"] as? String {
        self.closedDateTime = closedDateTime
    }else {
        self.closedDateTime = nil
    }

    if let reopenFlag = JSON["reopen_flag"] as? Bool {
        self.reopenFlag = reopenFlag
    }else {
        self.reopenFlag = nil
    }

    if let reopenDateTime = JSON["reopen_datetime"] as? String {
        self.reopenDateTime = reopenDateTime
    }else {
        self.reopenDateTime = nil
    }

}

}

JSON

`SUCCESS: (
    {
    "closed_datetime" = "<null>";
    "closed_flag" = 0;
    "date_created" = "2018-07-12T12:53:00.000";
    "delete_flag" = 0;
    "deleted_datetime" = "<null>";
    "end_datetime" = "2018-07-13T13:00:00.000";
    "event_id" = "707024c4-8b93-46d6-b34d-e95b53b45750";
    "event_location" = "IT Room";
    "event_name" = "Laugh Trip";
    hasRaffle = 0;
    "participant_count" = 6;
    "registered_participants_count" = 3;
    "registration_req" = 0;
    "reopen_datetime" = "<null>";
    "reopen_flag" = 0;
    "start_datetime" = "2018-07-13T12:00:00.000";
   }
  )

尝试后     if let passcodeJSON = response.result.value as? [[String:Any]], let passcodeObj = passcodeJSON.first { let event = Event.init(JSON: passcodeObj); completion(event) }

passcodeObj： [字符串：任意] 140256192790856键/值对

出现在调试区域中。似乎加载没有尽头。