Question

我有一个UIViewController，并且嵌入了我有一个UICollectionView，我还有一个名为ChatCell的子类

ChatCell Subclass:
class ChatCell: UICollectionViewCell {

    @IBOutlet weak var chatLabel: UILabel!
    @IBOutlet weak var chatImage: UIImageView!

}

class ChatRoom: UIViewController, UINavigationControllerDelegate, UIImagePickerControllerDelegate, UICollectionViewDataSource, UICollectionViewDelegate {



    @IBOutlet weak var collectionView2: UICollectionView!

//我的错误是^我更改了名称，我没有更新故事板中的插座！确保您有正确的插座，否则xcode无法识别它们。

    var secondClass : ChatCell?

    struct Object {
        var image: UIImage!
        var title: String!
    }

    // Properties
    var object: Object?
    var objects: [Object] = []
    var picker: UIImagePickerController!


    // Do any additional setup after loading the view, typically from a nib.


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

    override func viewDidLoad() {
        super.viewDidLoad()

        picker = UIImagePickerController()
        picker?.allowsEditing = false
        picker?.delegate = self
        picker?.sourceType = .photoLibrary
        // NavigationBar Characteristics
    }

    override func viewDidAppear(_ animated: Bool) {
        self.navigationController?.isNavigationBarHidden = false
        self.navigationController?.navigationBar.barTintColor = UIColor.black
        self.navigationController?.navigationBar.isTranslucent = false
        // self.navigationItem.leftBarButtonItem = UIBarButtonItem(title: "Logout", style: .plain, target: self, action: #selector(handleLogout))
        self.navigationItem.leftBarButtonItem?.tintColor = UIColor.green
        self.navigationItem.rightBarButtonItem = UIBarButtonItem(title: "+", style: .plain, target: self, action: #selector(didSelectCreateButton))
        self.navigationItem.rightBarButtonItem?.tintColor = UIColor.green

    }


    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as UICollectionViewCell
        let object = objects[indexPath.row]

        secondClass?.chatLabel.text = object.title ?? ""
        secondClass?.chatImage.image = object.image ?? UIImage()


        return cell
    }

    func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
        return objects.count

    }

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {

        switch info[UIImagePickerControllerOriginalImage] as? UIImage {
        case let .some(image):
            object?.image = image
        default:
            break
        }

        picker.dismiss(animated: true) {
            self.showCellTitleAlert()
        }
    }

    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {

        object = nil

        dismiss(animated: true) {
            self.collectionView2!.reloadData()
        }
    }

    // Alerts

    func showCellTitleAlert() {

        let alert = UIAlertController(title: "Cell Title", message: nil, preferredStyle: .alert)

        alert.addTextField { $0.placeholder = "Title" }
        alert.addAction(UIAlertAction(title: "Cancel", style: .cancel) { _ in
            self.object = nil
        })
        alert.addAction(UIAlertAction(title: "Save", style: .default) { _ in
            self.object?.title = (alert.textFields?.first.flatMap { $0.text })!
            self.object.flatMap { self.objects.append($0) }
            self.collectionView2?.reloadData()
        })

        present(alert, animated: true, completion: nil)
    }

    // Create new Cell
    ////////?//////////////
    @IBAction func didSelectCreateButton() {

        object = Object()

        present(picker, animated: true, completion: nil)
    }

}

Answer 1

在您的故事板（或xib）中，您已指定与名为collectionView的商店的连接，但在您的代码中，您将其称为collectionView2。

删除错误连接并重新执行以指向当前变量名称。

我收到此错误，此类不是密钥集合的密钥值编码兼容。＆＃39; ，

1 个答案: