SwiftのTableViewから別のViewControllerの値を表示できません

Question

1つのテーブル行の詳細を別のviewControllerに表示したいとします。しかし、それは言ってエラーを示して「致命的なエラー：オプションの値をアンラップしながら、予想外にnilを見つけ」

を次のように私のVCのコードは次のとおりです。私はこれを実行すると

import UIKit 

class ViewController: UIViewController, UITextFieldDelegate, UITableViewDelegate,UITableViewDataSource, UICollectionViewDataSource, UICollectionViewDelegate { 

@IBOutlet var nameForUser: UITextField! 
@IBOutlet var loginButton: UIButton! 

@IBOutlet var tableView: UITableView! 


let allEvents = Events.allEvents 
var nextScreenRow: Events! 
override func viewDidLoad() { 
    super.viewDidLoad() 
    //nameForUser.text! = "Please Enter Name Here" 
    // Do any additional setup after loading the view, typically from a nib. 



} 

func textFieldDidBeginEditing(textField: UITextField) { 
    textField.text = "" 
} 



func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 
    return self.allEvents.count 
} 

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { 

    let cell = tableView.dequeueReusableCellWithIdentifier("eventsCell")! 
    let event = self.allEvents[indexPath.row] 

    cell.textLabel?.text = event.eventName 
    cell.imageView?.image = UIImage(named: event.imageName) 
    cell.detailTextLabel?.text = event.entryType 
    //cell.textLabel?.text = allEvents[indexPath.row] 

    return cell 
} 

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) { 
    tableView.deselectRowAtIndexPath(indexPath, animated: true) 

    nextScreenRow = allEvents[indexPath.row] 

    performSegueWithIdentifier("tryToConnect", sender:self) 

} 

func tableView(tableView: UITableView, canEditRowAtIndexPath indexPath: NSIndexPath) -> Bool { 
    return true 
} 

func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { 
    return self.allEvents.count 
} 

func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell { 
    let sec = collectionView.dequeueReusableCellWithReuseIdentifier("eventsSec", forIndexPath: indexPath) as! GridCollectionViewCell 

    let event = self.allEvents[indexPath.row] 


    sec.imageView.image = UIImage(named: event.imageName) 

    sec.caption.text = event.entryType 

    return sec 
} 
func collectionView(collectionView: UICollectionView, didSelectItemAtIndexPath indexPath: NSIndexPath) { 
    performSegueWithIdentifier("tryToConnect2", sender: self) 
} 

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) { 
     if (segue.identifier == "successfulLogin"){ 
     segue.destinationViewController as! TabController 
     //let userName = nameForUser.text 
     //controller.userName = userName 

    } 

    else if (segue.identifier == "tryToConnect"){ 
      let dest = segue.destinationViewController as! DetailedEventViewController 
      dest.deatiledEvent.text = nextScreenRow.eventName 
      dest.eventType.text = nextScreenRow.entryType 
      dest.imageView.image = UIImage(named: nextScreenRow.imageName) 
      } 


} 



@IBAction func loginButtonWhenPressed(sender: UIButton) { 
    let userName = nameForUser.text 

    if userName == "" { 
     let nextController = UIAlertController() 
     nextController.title = "Error!" 
     nextController.message = "Please enter a name" 

     let okAction = UIAlertAction(title: "okay", style: UIAlertActionStyle.Default) { 
      action in self.dismissViewControllerAnimated(true, completion: nil) 
     } 

     nextController.addAction(okAction) 
     self.presentViewController(nextController, animated: true, completion: nil) 
    } 
} 

} 

、それがエラーを示しています。私はまた、テーブルビューの代理人を割り当てました。 'DetailedEventVC'のコードは次のとおりです。

import UIKit 

class DetailedEventViewController: UIViewController { 

@IBOutlet weak var imageView: UIImageView! 
@IBOutlet weak var deatiledEvent: UILabel! 
@IBOutlet weak var eventType: UILabel! 


override func viewDidLoad() { 
    super.viewDidLoad() 

    // Do any additional setup after loading the view. 
} 

override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 
    // Dispose of any resources that can be recreated. 
} 


/* 
// MARK: - Navigation 

// In a storyboard-based application, you will often want to do a little preparation before navigation 
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) { 
    // Get the new view controller using segue.destinationViewController. 
    // Pass the selected object to the new view controller. 
} 
*/ 

} 

なぜ値がnilであることがわかりますか？ ヘルプをいただければ幸いです。 ありがとうございます。 イベントの詳細を持つ 'EventsDetails.swift'ファイルは構造体です。値を呼び出す方法に何か間違いはありますか？

import Foundation 
import UIKit 

struct Events { 
let eventName: String 
let entryType: String 
let imageName: String 

static let EventKey = "NameKey" 
static let EntryTypeKey = "EntryType" 
static let ImageNameKey = "ImageNameKey" 

init(dictionary:[String : String]) { 
    self.eventName = dictionary[Events.EventKey]! 
    self.entryType = dictionary[Events.EntryTypeKey]! 
    self.imageName = dictionary[Events.ImageNameKey]! 
} 
} 

extension Events { 

static var allEvents: [Events] { 

    var eventsArray = [Events]() 

    for d in Events.localEventsData(){ 
     eventsArray.append(Events(dictionary: d)) 
    } 

    return eventsArray 
} 

static func localEventsData()-> [[String: String]] { 

    return [ 

     [Events.EventKey:"Metallica Concert in Palace Grounds", Events.EntryTypeKey: "Paid Entry", Events.ImageNameKey:"Metallica"], 
     [Events.EventKey:"Saree Exhibition in Malleswaram Grounds", Events.EntryTypeKey: "Free Entry", Events.ImageNameKey:"SareeExhibition"], 
     [Events.EventKey:"Wine tasting event in Links Brewery", Events.EntryTypeKey: "Paid Entry", Events.ImageNameKey:"WineTasting"], 
     [Events.EventKey:"Startups Meet in Kanteerava Stadium", Events.EntryTypeKey: "Paid Entry", Events.ImageNameKey:"StartupMeet"], 
     [Events.EventKey:"Summer Noon Party in Kumara Park", Events.EntryTypeKey: "Paid Entry", Events.ImageNameKey:"SummerNoonParty"], 
     [Events.EventKey:"Rock and Roll nights in Sarjapur Road", Events.EntryTypeKey: "Paid Entry", Events.ImageNameKey:"RockNRollNight"], 
     [Events.EventKey:"Barbecue Fridays in Whitefield", Events.EntryTypeKey: "Paid Entry", Events.ImageNameKey:"BBQFriday"], 
     [Events.EventKey:"Summer workshop in Indiranagar", Events.EntryTypeKey: "Free Entry", Events.ImageNameKey:"SummerWorkshop"], 
     [Events.EventKey:"Impressions & Expressions in MG Road", Events.EntryTypeKey: "Free Entry", Events.ImageNameKey:"ImpressionAndExpression"], 
     [Events.EventKey:"Italian carnival in Electronic City", Events.EntryTypeKey: "Free Entry", Events.ImageNameKey:"ItalianCarnival"] 

    ] 
} 
} 

Answer 1

あなたの目的地のViewControllerのプロパティを作成し、

import UIKit 

class DetailedEventViewController: UIViewController { 

@IBOutlet weak var imageView: UIImageView! 
@IBOutlet weak var deatiledEvent: UILabel! 
@IBOutlet weak var eventType: UILabel! 
var myImage = UIImage? 
var eventDetails = "" 
var typeOfEvent = "" 

override func viewDidLoad() { 
super.viewDidLoad() 
imageView.image = myImage 
deatiledEvent.text = eventDetails 
eventType.text = typeOfEvent 
// Do any additional setup after loading the view. 
} 

override func didReceiveMemoryWarning() { 
super.didReceiveMemoryWarning() 
// Dispose of any resources that can be recreated. 
} 
} 

以下のようにそれらを使用して、あなたの最初のViewControllerにあなたのDetailedEventViewControllerの出口はに接続されているかどうか

let dest = segue.destinationViewController as! DetailedEventViewController 
     dest.eventDetails = nextScreenRow.eventName 
     dest.typeOfEvent = nextScreenRow.entryType 
     dest.myImage = UIImage(named: nextScreenRow.imageName)