How to get the hour of the day with Swift? - ios

Question

How would I get the hour of the day in Swift.
I have tried NSCalendar and NSDateComponents, but I'm afraid I'm just starting with Swift.

Answer 1

Swift 5.0 / 4.0 / 3.0
let hour = Calendar.current.component(.hour, from: Date())
Or, if you're interested in 12 hour AM/PM date format, then use NSDateFormatter
let formatter = DateFormatter()
formatter.dateFormat = "hh a" // "a" prints "pm" or "am"
let hourString = formatter.string(from: Date()) // "12 AM"
If you want minutes, seconds and others, do as following
let date = Date() // save date, so all components use the same date
let calendar = Calendar.current // or e.g. Calendar(identifier: .persian)
let hour = calendar.component(.hour, from: date)
let minute = calendar.component(.minute, from: date)
let second = calendar.component(.second, from: date)
Check out available components on Apple docs:
.era, .year, .month, .day, .hour, .minute, .second,
.weekday, .weekdayOrdinal, .quarter, weekOfMonth, .weekOfYear,
.yearForWeekOfYear, .nanosecond, .calendar, .timezone
Swift 2.0
let hour = NSCalendar.currentCalendar().component(.Hour, fromDate: NSDate())
Swift 1.0
let hour = NSCalendar.currentCalendar().component(.CalendarUnitHour, fromDate: NSDate())

Answer 2

Swift 3:
let date = Date()// Aug 25, 2017, 11:55 AM
let calendar = Calendar.current
let hour = calendar.component(.hour, from: date) //11
let minute = calendar.component(.minute, from: date) //55
let sec = calendar.component(.second, from: date) //33
let weekDay = calendar.component(.weekday, from: date) //6 (Friday)
Get any of component available from the API below
public enum Component {
case era
case year
case month
case day
case hour
case minute
case second
case weekday
case weekdayOrdinal
case quarter
case weekOfMonth
case weekOfYear
case yearForWeekOfYear
case nanosecond
case calendar
case timeZone
}
Swift 2:
let currentHour = NSCalendar.currentCalendar().component(.Hour, fromDate: NSDate())
This could be enough :
let currentDate = NSDate() // You can input the custom as well
let calendar = NSCalendar.currentCalendar()
let components = calendar.components(.CalendarUnitHour | .CalendarUnitMinute, fromDate: currentDate)
let currentHour = components.hour // You can play around with the ""components""

Answer 3

If you want the current hour in a String, this is as short and readable I could think of.
let formatter = NSDateFormatter()
formatter.dateFormat = "HH"
let timeString = formatter.stringFromDate(NSDate())

Answer 4

Finally I was able to find the easiest solution after struggling for a time
let dateComponents = NSCalendar.currentCalendar().components(NSCalendarUnit.HourCalendarUnit, fromDate: NSDate())
let nHourOfDay = dateComponents.hour

Answer 5

For Swift 2.0:
let hour = NSCalendar.currentCalendar().component(NSCalendarUnit.Hour, fromDate: NSDate())

Answer 6

Here is a reference example for how I do it (DateUtils.swift) -
Example Use:
let today = DateUtils.getToday();
let hr = DateUtils.getHours(today);
let min = DateUtils.getMinutes(today);
... (etc.) ...
DateUtils.swift:
//Field wrapper routines
class func getToday() -> Date { return Date(); }
class func getHours(_ date : Date) -> Int { return Calendar.current.component(.hour, from: date); }
class func getMinutes(_ date : Date) -> Int { return Calendar.current.component(.minute, from: date); }
... (continued for all fields, see file) ...

Answer 7

You can get the integer value of the current hour in one step like this:
let currentHour = NSCalendar.currentCalendar().components(.Hour, fromDate: NSDate()).hour