我正在尝试制作Meme Generating应用。生成模因时，会将其保存到嵌入标签栏的表视图中。如果您选择表格上的单元格，它应该转到显示您选择的模因的视图控制器。这是我的代码。每当我尝试选择一个单元格时，我会在准备segue函数的最后一行得到错误“在尝试解包时发现nil和可选”。请帮忙！
import UIKit
class SentMemesTableViewController: UITableViewController {
var memes: [UIImage]! {
let object = UIApplication.shared.delegate
let appDelegate = object as! AppDelegate
return appDelegate.memedImages
}
var newMeme: UIImage!
override func viewDidLoad() {
super.viewDidLoad()
tableView.reloadData()
}
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
tableView.reloadData()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
// MARK: - Table view data source
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return memes.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let meme = memes[indexPath.row]
let cell = tableView.dequeueReusableCell(withIdentifier: "MemeCell", for: indexPath)
cell.imageView?.image = meme
newMeme = meme
return cell
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
self.performSegue(withIdentifier: "memeDetail", sender: newMeme)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "memeDetail" {
let detailVC = segue.destination as! MemeDetailViewController
detailVC.memePreview.image = newMeme
}
}
}