How to Get the Hour of the Day with Swift

How to get the current time as datetime

Update for Swift 3:

let date = Date()
let calendar = Calendar.current
let hour = calendar.component(.hour, from: date)
let minutes = calendar.component(.minute, from: date)

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I do this:

let date = NSDate()
let calendar = NSCalendar.currentCalendar()
let components = calendar.components(.CalendarUnitHour | .CalendarUnitMinute, fromDate: date)
let hour = components.hour
let minutes = components.minute

See the same question in objective-c How do I get hour and minutes from NSDate?

Compared to Nate’s answer, you’ll get numbers with this one, not strings… pick your choice!

How to calculate days, hours, minutes from now to certain date in swift

You need to find out when is the next birth date based on the day and month of birthday. You can use Calendar's method nextDate(after: Date, matching: DateComponents)

func nextDate(after date: Date, matching components: DateComponents, matchingPolicy: Calendar.MatchingPolicy, repeatedTimePolicy: Calendar.RepeatedTimePolicy = default, direction: Calendar.SearchDirection = default) -> Date?

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let birthDateCoponents = DateComponents(month: 4, day: 16)
let nextBirthDate = Calendar.current.nextDate(after: Date(), matching: birthDateCoponents, matchingPolicy: .nextTime)!

let difference = Calendar.current.dateComponents([.day, .hour, .minute, .second], from: Date(), to: nextBirthDate)

difference.day     // 105
difference.hour    // 2
difference.minute  // 5
difference.second  // 30

When displaying it to the user you can use DateComponentsFormatter with the appropriate unitsStyle. You can see below how it would look like when using .full style and limiting the units to .day, .hour, .minute, .second:

let formatter = DateComponentsFormatter()
formatter.allowedUnits = [.day, .hour, .minute, .second]

formatter.unitsStyle = .full
formatter.string(from: Date(), to: nextBirthDate)  // "105 days, 1 hour, 44 minutes, 36 seconds"

Get All Hours of The Day (in date format) from 9am tp 11pm and Save within an array in Swift

When you access .hour for any calender its in a 24h format. so you need to something like this:

let today = Date()
var sortedTime: [Date] = []
var calender = Calendar(identifier: .iso8601)
calender.locale = Locale(identifier: "en_US_POSIX")
let currentHour = calender.component(.hour, from: today)
(0...(24-currentHour)).forEach {
    guard let newDate = calender.date(byAdding: .hour, value: $0, to: today) && calender.component(.hour, from: newDate) != 0,
        calender.component(.hour, from: newDate) <= 23 else {
        return
    }
    //convert date into desired format
    sortedTime.append(newDate)
}

How to get hours and minutes from UIDatePicker

UIDatePicker just give you the selected Date, if you need the date component based on current calendar, check out the Calendar and DateComponent documendation for details.

let now = Date() // your date
let dateComponents = Calendar.current.dateComponents([.hour, .minute], from: now)

dateComponents.hour
dateComponents.minute

If you need hours and minutes for time distance, you need the calculate it manually with your prefer base date.

How to change the current day's hours and minutes in Swift?

Be aware that for locales that uses Daylight Saving Times, on clock change days, some hours may not exist or they may occur twice. Both solutions below return a Date? and use force-unwrapping. You should handle possible nil in your app.

Swift 3, 4, 5 and iOS 8 / OS X 10.9 or later

let date = Calendar.current.date(bySettingHour: 9, minute: 30, second: 0, of: Date())!

Swift 2

Use NSDateComponents / DateComponents:

let gregorian = NSCalendar(calendarIdentifier: NSCalendarIdentifierGregorian)!
let now = NSDate()
let components = gregorian.components([.Year, .Month, .Day, .Hour, .Minute, .Second], fromDate: now)

// Change the time to 9:30:00 in your locale
components.hour = 9
components.minute = 30
components.second = 0

let date = gregorian.dateFromComponents(components)!

Note that if you call print(date), the printed time is in UTC. It's the same moment in time, just expressed in a different timezone from yours. Use a NSDateFormatter to convert it to your local time.

Display time of day when a button is pressed ios

You need to use DateFormatter instead of DateComponents to get Date or Time in specific format.

let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "HH:mm"
let time = dateFormatter.string(from: Date())
mylable.text = time

How to calculate Day(s) and Hour(s) remaining in swift between two dates?]

Try using DateFormatter and DateComponents to get this working.

Get the Date instances from String using DateFormatter and then get day and hour components using DateComponents, i.e.

let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd"

if let d1 = dateFormatter.date(from: "2019-11-23"), let d2 = dateFormatter.date(from: "2019-11-4") {
    let components = Calendar.current.dateComponents([.day, .hour], from: d2, to: d1)
    print(components.day, components.hour)
}

How to get 1 hour ago from a date in iOS swift?

For correct calculations involving NSDate that take into account all edge cases of different calendars (e.g. switching between day saving time) you should use NSCalendar class:

Swift 3+

let earlyDate = Calendar.current.date(
  byAdding: .hour, 
  value: -1, 
  to: Date())

Older

// Get the date that was 1hr before now
let earlyDate = NSCalendar.currentCalendar().dateByAddingUnit(
       .Hour,
       value: -1, 
       toDate: NSDate(),
       options: [])

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