iOS) Date 로 날짜다루기

Date 로 날짜 다루기

Date() 를 저장해서 사용

1. .dateComponents 사용해봤다 하지만 역시 불편하다

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        guard let cell = tableView.dequeueReusableCell(withIdentifier: "StoryTVC") as? StoryTVC else {
            return UITableViewCell()
        }
        let month = Calendar.current.dateComponents([.month], from: storyList[indexPath.row].date ?? Date()).month
        let day = Calendar.current.dateComponents([.day], from: storyList[indexPath.row].date ?? Date()).day
        
var dayText = ""
        if let month = month ,let day = day {
            if month < 10 && day < 10 {
                dayText = "0\(month).0\(day)"
            } else if month < 10 && day >= 10 {
                dayText = "0\(month).\(day)"
            } else if month >= 10 && day < 10 {
                dayText = "\(month).0\(day)"
            } else {
                dayText = "\(month).\(day)"
            }
        }
        
        cell.setData(title: storyList[indexPath.row].title ?? "" , date: dayText)
        return cell
  }

let request: NSFetchRequest<StoryModel> = StoryModel.fetchRequest()
        let fetchResult = PersistenceManager.shared.fetch(reqeust: request)
        titleButton.setTitle(fetchResult[self.indexPath].title, for: .normal)
        
        if let date = fetchResult[self.indexPath].date {
            let year = Calendar.current.dateComponents([.year], from: date).year!
            let month = Calendar.current.dateComponents([.month], from: date).month!
            let day = Calendar.current.dateComponents([.day], from: date).day!
            let week = Calendar.current.dateComponents([.weekday], from: date).weekday!
            let hour = Calendar.current.dateComponents([.hour], from: date).hour!
            let minute = Calendar.current.dateComponents([.minute], from: date).minute!
            
                        var pmam = ""
            switch hour {
            case 0..<12:
                pmam = "오전"
                break
            case 12..<24:
                pmam = "오후"
                break
            default:
                break
            }

            var weekDay = ""
            switch week {
            case 1:
                weekDay = "일"
                break
            case 2:
                weekDay = "월"
                break
            case 3:
                weekDay = "화"
                break
            case 4:
                weekDay = "수"
                break
            case 5:
                weekDay = "목"
                break
            case 6:
                weekDay = "금"
                break
            case 7:
                weekDay = "토"
                break
            default:
                break
            }
            dateLabel.text = "\(year)년 \(month)월 \(day)일 \(weekDay) \(pmam) \(hour):\(minute)"

1. 조금 더 편한 방법으로 DateFormatter.dateFormat() 를 사용해서 형식을 정해서 사용해보자.

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        guard let cell = tableView.dequeueReusableCell(withIdentifier: "StoryTVC") as? StoryTVC else {
            return UITableViewCell()
        }
        if let date = storyList[indexPath.row].date {
            let dateFormatter = DateFormatter()
            dateFormatter.dateFormat = "MM.dd"
            dateFormatter.locale = Locale(identifier: "ko_KR")
            let dateStr = dateFormatter.string(from: date)
            
            cell.setData(title: storyList[indexPath.row].title ?? "" , date: dateStr)
        }
        return cell
    }

if let date = fetchResult[self.indexPath].date {
            // 2021년 6월 9일 수 오전 12:40
            let dateFormatter = DateFormatter()
            dateFormatter.dateFormat = "yyyy년 MM월 dd일 E a hh:mm"
            dateFormatter.locale = Locale(identifier: "ko_KR")
            let dateStr = dateFormatter.string(from: date)
            dateLabel.text = dateStr
}

위의 방식처럼 Core Data 에 자료형 Date 를 사용해서 저장 후 추출해서 사용했다.

출처

출처ㅣ[Swift] Date() 날짜구하기, DateFormatter() 다루기 오전, 오후 등등