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

i0S Swift Issue

Question or problem with Swift language programming:

If I create a Date() to get the current date and time, I want to create a new date from that but with different hour, minute, and zero seconds, what’s the easiest way to do it using Swift? I’ve been finding so many examples with ‘getting’ but not ‘setting’.

How to solve the problem:

Solution 1:

Be aware that for locales that uses Daylight Saving Times, some hours may not exist on the clock change days 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 and iOS 8 / OS X 10.9 or later
let date = 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.

Solution 2:

swift 3 date extension with timezone

extension Date {
    public func setTime(hour: Int, min: Int, sec: Int, timeZoneAbbrev: String = "UTC") -> Date? {
        let x: Set = [.year, .month, .day, .hour, .minute, .second]
        let cal = Calendar.current
        var components = cal.dateComponents(x, from: self)

        components.timeZone = TimeZone(abbreviation: timeZoneAbbrev)
        components.hour = hour
        components.minute = min
        components.second = sec

        return components)

Solution 3:

//Increase the day & hours in Swift

let dateformat = DateFormatter()
let timeformat = DateFormatter()
dateformat.dateStyle = .medium
timeformat.timeStyle = .medium

//Increase Day

let currentdate = Date()

let currentdateshow = dateformat.string(from: currentdate)
textfield2.text = currentdateshow

let myCurrentdate = dateTimeString)!
let tomorrow = .day, value: 1, to: myCurrentdate) // Increase 1 Day

let tomorrowday = dateformat.string(from: tomorrow!)
text3.text = tomorrowday
text3.isEnabled = false
//increase Time  
let time = Date()

let currenttime = timeformat.string(from: time)
text4.text = currenttime
let mycurrenttime = currenttime)!
let increasetime = .hour, value: 2, to: mycurrenttime) //increase 2 hrs.

let increasemytime = timeformat.string(from: increasetime!)
text5.text = increasemytime

Hope this helps!