Add UITextField debounce and throttle ability with stupid simple way.

UITextField + DebounceThrottle.swift

extension UITextField {
    private static var _texts = [String: [String]]()
    var texts: [String] {
        get {
            let tmpAddress = String(format: "%p", unsafeBitCast(self, to: Int.self))
            return UITextField._texts[tmpAddress] ?? []
        }
        set {
            let tmpAddress = String(format: "%p", unsafeBitCast(self, to: Int.self))
            UITextField._texts[tmpAddress] = newValue
        }
    }
    
    private static var _textClosureBag = [String: [(String) -> ()]]()
    var textClosureBag: [(String) -> ()] {
        get {
            let tmpAddress = String(format: "%p", unsafeBitCast(self, to: Int.self))
            return UITextField._textClosureBag[tmpAddress] ?? []
        }
        set {
            let tmpAddress = String(format: "%p", unsafeBitCast(self, to: Int.self))
            UITextField._textClosureBag[tmpAddress] = newValue
        }
    }
    
    func debounce(on queue: DispatchQueue = .main, by timeInterval: TimeInterval, closure: @escaping (String) -> ()) {
        texts.append(self.text!)
        textClosureBag.append(closure)
        queue.asyncAfter(deadline: .now() + timeInterval) {
            guard let lastClosure = self.textClosureBag.last, let lastText = self.texts.last else { return }
            lastClosure(lastText)
            self.texts.removeAll()
            self.textClosureBag.removeAll()
        }
    }
    
    func throttle(on queue: DispatchQueue = .main, by timeInterval: TimeInterval, closure: @escaping (String) -> ()) {
        texts.append(self.text!)
        textClosureBag.append(closure)
        queue.asyncAfter(deadline: .now() + timeInterval) {
            guard let firstClosure = self.textClosureBag.first, let firstText = self.texts.first else { return }
            firstClosure(firstText)
            self.texts.removeAll()
            self.textClosureBag.removeAll()
        }
    }
}

Usage.swift

inputTextField.debounce(by: 2) { (text) in
    DispatchQueue.main.async {
        print("text -> \(text)")
    }
}