Sample code to get the current date, day of the week, and current time in Swift4.1.
You can get it as a string of the following format.
Thu, Apr 03, 2018
19:03:34
Here is the sample code to get it in the form shown above.
If you use Calendar.current, there is a possibility that you will get it in Japanese calendar (Heisei 00 year) depending on the setting (you want 2018/04/03, but 30/04/03 comes back), so it is better to get it in Gregorian calendar.
On the other hand, if you want a Japanese calendar, there is a way to get a Japanese calendar.
This site is detailed.
Swift 3 の日時操作チートシート
Other sites that I found helpful
Swift3での日時に関する処理
【Swift3】現在時刻の取得とDataFormatterでの文字列化
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| import UIKit | |
| class ViewController: UIViewController { | |
| override func viewDidLoad() { | |
| super.viewDidLoad() | |
| self.view.backgroundColor = .white | |
| print(getDateString()) //2018/05/10 (木) | |
| print(getDateString2()) //2018年5月10日 | |
| print(getTimeString()) //09:27:08 | |
| } | |
| func getDateString() -> String { | |
| let date = NSDate() | |
| let formatter = DateFormatter() | |
| formatter.dateFormat = "yyyy/MM/dd" | |
| let dateStr = formatter.string(from: date as Date) | |
| //あまり良く無い例 | |
| /* | |
| let cal = NSCalendar(calendarIdentifier: .gregorian) | |
| let weeks = ["日","月","火","水","木","金","土"] | |
| let comp = cal?.components(NSCalendar.Unit.weekday, from: date as Date) | |
| let weekIdx = comp?.weekday | |
| var weekStr = weeks[weekIdx! - 1] | |
| */ | |
| //ローカライズなどを考えてこっちを使おう！ | |
| formatter.locale = NSLocale(localeIdentifier: "ja_JP") as Locale? | |
| formatter.dateFormat = DateFormatter.dateFormat(fromTemplate: "EEEEE", options: 0, locale: Locale.current) | |
| let weekStr = formatter.string(from: date as Date) | |
| return dateStr + " (" + weekStr + ")" | |
| } | |
| func getDateString2() -> String { | |
| let date = NSDate() | |
| let formatter = DateFormatter() | |
| //あまり良く無い例 | |
| //formatter.dateFormat = "yyyy年MM月dd日" | |
| //ローカライズなどを考えてこっちを使おう！ | |
| formatter.dateFormat = DateFormatter.dateFormat(fromTemplate: "ydMMM", options: 0, locale: Locale(identifier: "ja_JP")) | |
| return formatter.string(from: date as Date) | |
| } | |
| func getTimeString() -> String { | |
| let date = NSDate() | |
| let formatter = DateFormatter() | |
| formatter.dateFormat = "HH:mm:ss" | |
| return formatter.string(from: date as Date) | |
| } | |
| } |