我正在尝试做一个应用程序，当你点击collectionview单元格上的按钮，你可以显示详细的viewcontroller，并提供更多关于你的选择的信息。但我的结构体的所有属性在其他viewController上显示为nil。
这是我的视图控制器，包括集合视图

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var collectionView: UICollectionView!
    var ilceDizisi = [Ilceler]()
    var secim : Ilceler?
    override func viewDidLoad() {
        super.viewDidLoad()
        collectionView.delegate = self
        collectionView.dataSource = self
        let textAttributes = [NSAttributedString.Key.foregroundColor:UIColor.white, NSAttributedString.Key.font:UIFont(name: "Papyrus", size: 25.0)]
        navigationController?.navigationBar.titleTextAttributes = textAttributes as [NSAttributedString.Key : Any]
        //Hucre Boyurlandirmasi
        let tasarim = UICollectionViewFlowLayout()
        let genislik = self.collectionView.frame.size.width
        tasarim.minimumInteritemSpacing = 5
        tasarim.minimumLineSpacing = 5
        tasarim.sectionInset = UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 10)
        tasarim.itemSize = CGSize(width: (genislik - 30) / 2, height: 322.0)
        collectionView.collectionViewLayout = tasarim
        ilceDizisi = [Ilceler.adalar, Ilceler.arnavutkoy, Ilceler.atasehir, Ilceler.avcilar, Ilceler.bagciler, Ilceler.bahcelievler, Ilceler.bakirkoy, Ilceler.basaksehir, Ilceler.bayrampasa, Ilceler.besiktas, Ilceler.beykoz, Ilceler.beylikduzu , Ilceler.beyoglu, Ilceler.buyukcekmece, Ilceler.catalca , Ilceler.cekmekoy , Ilceler.esenler , Ilceler.esenyurt , Ilceler.eyupsultan , Ilceler.fatih , Ilceler.gaziosmanpasa , Ilceler.gungoren , Ilceler.kadikoy , Ilceler.kagithane , Ilceler.kartal, Ilceler.kucukcekmece , Ilceler.maltepe , Ilceler.pendik , Ilceler.sancaktepe , Ilceler.sariyer , Ilceler.sile , Ilceler.sultanbeyli , Ilceler.sultangazi , Ilceler.sile, Ilceler.sisli , Ilceler.tuzla , Ilceler.umraniye , Ilceler.uskudar , Ilceler.zeytinburnu]
  
    }

}


extension ViewController : UICollectionViewDelegate , UICollectionViewDataSource, CellButton {
    
    func numberOfSections(in collectionView: UICollectionView) -> Int {
        return 1
    }
    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return ilceDizisi.count
    }
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "hucre", for: indexPath) as! Cell
        cell.isimLabel.text = ilceDizisi[indexPath.row].isim!
        cell.yakaLabel.text = ilceDizisi[indexPath.row].yaka!
        cell.ilceGorsel.image = UIImage(named: ilceDizisi[indexPath.row].gorsel!)
        cell.prot = self
        cell.indexPath = indexPath
        return cell
    }
    func detail(indexPath: IndexPath) {
        performSegue(withIdentifier: "toDetailVC", sender: nil)
        secim = ilceDizisi[indexPath.row]
        
        
        
    }
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        if segue.identifier == "toDetailVC" {
            let destVC = segue.destination as! DetailViewController
            destVC.secilenIlce = secim
        }
    }
    
}

这是我的详细视图Controller

import UIKit

class DetailViewController: UIViewController {

    @IBOutlet weak var baskan: UILabel!
    @IBOutlet weak var yuz: UILabel!
    @IBOutlet weak var nufus: UILabel!
    @IBOutlet weak var yaka: UILabel!
    @IBOutlet weak var gorselView: UIImageView!
    @IBOutlet weak var ilceLabel: UILabel!
    var secilenIlce : Ilceler?
    override func viewDidLoad() {
        super.viewDidLoad()
        baskan.text = "Belediye Başkanı : \(secilenIlce?.belediyeBaskani)"
        yuz.text = "Yüzölçümü(km²) : \(secilenIlce?.yuzolcumu)"
        nufus.text = "Nüfus : \(secilenIlce?.nufus)"
        yaka.text = "Bulunduğu Yaka : \(secilenIlce?.yaka)"
        gorselView.image = UIImage(named: (secilenIlce?.gorsel)!)
        ilceLabel.text = secilenIlce?.isim    
    }
}

我想看到这样的信息

但当我开始这个项目时

我试图用prepareforsegue函数获取所有信息。实际上我需要删除imageview。图像代码，因为它返回nil，如果我解开它，我的项目会崩溃。我的错是什么，我如何修复它