长按快速删除自定义键盘的键

I am making a custom keyboard. The delete key in the keyboard works fine for single tap. But it does not work for long press.I want to implement the long press on the delete key so that when the user holds down the delete button, the keyboard continuously deletes like in the standard ios keyboard. I referred to a couple of solutions on Stackoverflow, like- I am making a custom keyboard. The delete key i