如何将Key值对附加到iPhone上的UIView？

class MyView: UIView {
    var keyValuePairs: [String: Any] = [:]
}

extension MyView {
    func setValue(_ value: Any, forKey key: String) {
        keyValuePairs[key] = value
    }
    
    func value(forKey key: String) -> Any? {
        return keyValuePairs[key]
    }
    
    func removeValue(forKey key: String) {
        keyValuePairs.removeValue(forKey: key)
    }
}

let myView = MyView(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
myView.setValue("Hello", forKey: "title")
myView.setValue(42, forKey: "number")

let title = myView.value(forKey: "title") as? String
let number = myView.value(forKey: "number") as? Int

print("Title: \(title ?? "nil")")
print("Number: \(number ?? -1)")

myView.removeValue(forKey: "title")