@IBOutlet var textField: UITextField! {
    didSet {
        textField.delegate = self
        textField.isEnabled = false
        textField.inputAssistantItem.leadingBarButtonGroups = []
        textField.inputAssistantItem.trailingBarButtonGroups = []

        let tap = UITapGestureRecognizer(target: self, action: #selector(tapHandler(_:)))
        tap.numberOfTapsRequired = 2
        textField.addGestureRecognizer(tap)
    }
}

@objc func tapHandler(_ recognizer: UITapGestureRecognizer) {
    switch recognizer.state {
    case .ended:
        textField.isEnabled = true
    default:
        break
    }
}