DatePicker 값 버튼 Title로 보내기

let formatter = DateFormatter()
formatter.dateFormat = "YY-MM-d"

let dateString = formatter.string(from: selectDatePicker.date)


//버튼 Tag값을 구분해서 넣기
if buttonTag == 1{

    outDateBtn.setTitle(dateString, for: UIControlState())

   }else if buttonTag == 2{

    inDateBtn.setTitle(dateString, for: UIControlState())

   }else{

}