ios - How to apply textFieldShouldBeginEditing on one specific UITextField in Swift -

i have 4 text fields address, city, state, , zip. need call picker view state field only, need hide keyboard on state text field. i'm trying in textfieldshouldbeginediting function using piece of code, it's applying text fields.

func textfieldshouldbeginediting(state: uitextfield) -> bool {  return false } 

i applying piece of code text fields keyboard hide on return

func textfieldshouldreturn(textfield: uitextfield!) -> bool {     self.view.endediting(true)     return false } 

so of text fields here in viewdidload

    address.delegate = self     city.delegate = self     zip.delegate = self     state.delegate = self 

i hope specific enough. help!

in delegate call-back, can verify 'textfield' text-fields. ex:

func textfieldshouldreturn(textfield: uitextfield!) -> bool {     if textfield == address {        self.view.endediting(true)        return false     }     ... }