[Close keyboard] close all the keyboard on the screen in iOS #iOS #keyboard #first responder #close

readme.txt

you needn't search and find which inputfield is current first responder, just call the endEditing method in the viewcontroller's view, it will find and resign first responder for itself or textfield inside ot it.

reference on UIView.endEditing:
Causes the view (or one of its embedded text fields) to resign the first responder status.

This method looks at the current view and its subview hierarchy for the text field that is currently the first responder. If it finds one, it asks that text field to resign as first responder. If the force parameter is set to true, the text field is never even asked; it is forced to resign.

CloseKeyboard.swift

//You can drag a tapGestureRecongizer to the very bottom view, and link a IBAction like below to it 
@IBAction func closeAllKeyborad(_ sender: Any) {
    view.endEditing(true)
}