通知中心收不到通知

Question

我在里面有按钮 Collection View Cell 每当有人单击该按钮时，我想注册一个通知，创建变量 name 并将其值设置为单元格的属性 nameLabel，之后我想将该通知发送到我的第二个 Collection View 并将 Collection View 的单元格 nameLabel.text 设置为我从第一个发送的 name 字符串Collection View

如果您需要任何附加代码，请在评论中告诉我

extension Notification.Name {
    static let AddToFavorites = Notification.Name("add_to_favorites")
}

// button inside first collection view cell
    @IBAction func likeButoon(_ sender: Any) {
        print("Button works fine")
        let name = self.nameLabel.text    // first collection view cell's property nameLabel
        NotificationCenter.default.post(name: .AddToFavorites, object: name)
    }

// second collection view controller
    var string1:String = ""
    override func viewDidLoad() {
        super.viewDidLoad()
        NotificationCenter.default.addObserver(self, selector: #selector(notificationRecieved), name: .AddToFavorites, object: nil)
    }
    @objc func notificationRecieved(notification: Notification){
        guard let name = notification.object as? String else {
            return
        }
        string1 = name
    }
    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionViewFavorites.dequeueReusableCell(withReuseIdentifier: "favoritesCell", for: indexPath) as? CollectionViewCellFavorites
        cell?.nameLabel.text = string1        // Second collection view cell's property nameLabel
        return cell!
    }

Answer 1

您需要刷新

string1 = name
collectionView.reloadData()

通知中心收不到通知

Notification center can't recieve a notif

ios

swift

xcode

uikit

nsnotificationcenter