ios - textfield auto focus not working properly -
i have 6 text field text box. , when user finish enter in first text field, should automatically have go second , on. here code hats not working. when enter value in first text field, values entering in second ..here code :
this below code have done enter 1 digit in each text field. here how can add text field responder...once finish first text field, adn on...
func textfield(_ textfield: uitextfield, shouldchangecharactersin range: nsrange, replacementstring string: string) -> bool { if textfield == self.cardtextfieldone{ guard let text = textfield.text else {return true} let newlength = text.characters.count + string.characters.count - range.length return newlength <= 1 }else if textfield == self.cardtextfieldtwo{ guard let text = textfield.text else { return true } let newlength = text.characters.count + string.characters.count - range.length return newlength <= 1 } else if textfield == self.cardtextfieldtwo{ guard let text = textfield.text else { return true } let newlength = text.characters.count + string.characters.count - range.length return newlength <= 1 } else if textfield == self.cardtextfieldthree{ guard let text = textfield.text else { return true } let newlength = text.characters.count + string.characters.count - range.length return newlength <= 1 } else if textfield == self.cardtextfieldfour{ guard let text = textfield.text else { return true } let newlength = text.characters.count + string.characters.count - range.length return newlength <= 1 } else if textfield == self.cardtextfieldfive{ guard let text = textfield.text else { return true } let newlength = text.characters.count + string.characters.count - range.length return newlength <= 1 } else if textfield == self.cardtextfieldsix{ guard let text = textfield.text else { return true } let newlength = text.characters.count + string.characters.count - range.length return newlength <= 1 } else if textfield == self.cardtextfieldmonth{ guard let text = textfield.text else { return true } let newlength = text.characters.count + string.characters.count - range.length return newlength <= 2 } else if textfield == self.cardtextfieldyear{ guard let text = textfield.text else { return true } let newlength = text.characters.count + string.characters.count - range.length return newlength <= 2 } return true } thanks in advance !!
update
if textfield == self.cardtextfieldone{ guard let text = textfield.text else {return true} let newlength = text.characters.count + string.characters.count - range.length if (string == "") || string.characters.count < 1 { return true //this allow backspace }else if (cardtextfieldone.text?.characters.count)! >= 1 { cardtextfieldone.resignfirstresponder(); self.cardtextfieldtwo.becomefirstresponder() return false } return newlength <= 1 }
simple solution
create method called every time change textfield text below can see in image, while right click on textfield, see editing change drag , create method 
@ibaction func editing(_ sender: uitextfield) { if sender == yourfirsttextfield { if sender.text?.characters.count == 1 { yournexttextfield.becomefirstresponder() } } } 
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