So, I have some issues when creating up my project, the main issues is my custom class pickerview with toolbar won't appear after I click a button. I've add a target to the button (you can see on the photo below).
This is the custom class of ToolbarPickerView [1][1]: https://i.stack.imgur.com/GuO7J.png
This is when the functionality being called[2][2]: https://i.stack.imgur.com/T6ErZ.png
Specially at line 186 - 206, only two textfield that can work (without the custom pickerview) and it can show the input view (numpad keyboard)
I don't the problem why my toolbar pickerview don't show up after I click the button.