unrecognized selector sent to instance...のエラーを消せないです

以下のコードをカスタムクラスに書いて、InterFaceBuilderでtextFieldのCustom Classにそのクラス名(PickerText)を指定してシュミレータを起動しました。決定ボタン(UIBarButtonItem)を押したところ、unrecognized selector sent to instance 0x7fe24e407e10というエラーが出ました。Custom Class名や#selecterを確認しましたが合っている様です。この解決方法をご教授ください。

Swift
import Foundation
import UIKit

class PickerText: UITextField {

     var datePicker: UIDatePicker!

    required init?(coder: NSCoder) {
        super.init(coder: coder)
        commoninit()
    }
    override init(frame: CGRect) {
        super.init(frame: frame)
        commoninit()
    }

     func commoninit(){

        datePicker = UIDatePicker()
        datePicker.date = Date()
        datePicker.datePickerMode = .date
        datePicker.locale = Locale(identifier: "ja")
        datePicker.addTarget(self, action: #selector(setText), for: .valueChanged)
        setText()

        inputView = datePicker
        inputAccessoryView = createToolbar()

    }


    func createToolbar() -> UIToolbar {
        let toolbar = UIToolbar()
        toolbar.frame = CGRect(x: 0, y: 0, width: self.frame.width, height: 44)

        let space = UIBarButtonItem(barButtonSystemItem: .fixedSpace, target: self, action: nil)
        space.width = 12
        let flexSpaceItem = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: self, action: nil)
        let todayButtonItem = UIBarButtonItem(title: "今日", style: .done, target: self, action: #selector(todayPicker))
        let doneButtonItem = UIBarButtonItem(title: "決定", style: .done, target: self, action: #selector(donePicker))

        let toolbarItems = [space, flexSpaceItem, todayButtonItem, doneButtonItem]
        toolbar.setItems(toolbarItems, animated: true)

        return toolbar
    }

    @objc  func todayPicker() {
        datePicker.date = Date()
        setText()
    }

    @objc private func donePicker() {
       setText() 
       self.endEditing(true)
    }

       @objc func setText(){
        let f = DateFormatter()
        f.calendar = Calendar(identifier: .japanese)
        f.dateStyle = .long
        f.locale = Locale(identifier: "ja")
        text = f.string(from: datePicker.date)

       }


    override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
        return false
    }

    override func selectionRects(for range: UITextRange) -> [UITextSelectionRect] {
        return []
    }

    override func caretRect(for position: UITextPosition) -> CGRect {
        return CGRect(x: 0, y: 0, width: 0, height:0)
    }

}