swift UITableView/ UICollectionView调用观察(\.xxx)不起作用

// 添加观察者
NotificationCenter.default.addObserver(self, selector: #selector(handleNotification), name: NSNotification.Name("YourNotificationName"), object: nil)

// 发送通知
NotificationCenter.default.post(name: NSNotification.Name("YourNotificationName"), object: nil)

// 处理通知
@objc func handleNotification(notification: Notification) {
    // 处理通知逻辑
}

class YourViewController: UIViewController {
    @objc dynamic var observedProperty: String = ""

    override func viewDidLoad() {
        super.viewDidLoad()
        self.addObserver(self, forKeyPath: "observedProperty", options: [.new, .old], context: nil)
    }

    override func observeValue(forKeyPath keyPath: String?, of object: Any?, change: [NSKeyValueChangeKey : Any]?, context: UnsafeMutableRawPointer?) {
        if keyPath == "observedProperty" {
            // 属性变化时的处理逻辑
        }
    }

    deinit {
        self.removeObserver(self, forKeyPath: "observedProperty")
    }
}

@objc func handleNotification(notification: Notification) {
    DispatchQueue.global(qos: .userInitiated).async {
        // 后台处理逻辑
    }
}