How to add minutes to current time in swift
IosSwiftDateIos Problem Overview
I am new to Swift and am trying a scheduler. I have the start time selected and I need to add 5 minutes (or multiples of it) to the start time and display it in an UILabel
?
@IBAction func timePickerClicked(sender: UIDatePicker) {
var dateFormatter = NSDateFormatter()
dateFormatter.timeStyle = NSDateFormatterStyle.ShortStyle
var dateStr = dateFormatter.stringFromDate(startTime.date)
let sttime = dateStr
startTimeDisplay.text = dateStr
}
// How to advance time by 5 minutes for each section based on the start time selected and display time
// section 1 = start time + 5
// section 2 = start time + 10*
Ios Solutions
Solution 1 - Ios
Two approaches:
-
Use
Calendar
anddate(byAdding:to:wrappingComponents:)
. E.g., in Swift 3 and later:let calendar = Calendar.current let date = calendar.date(byAdding: .minute, value: 5, to: startDate)
-
Just use
+
operator (see+(_:_:)
) to add aTimeInterval
(i.e. a certain number of seconds). E.g. to add five minutes, you can:let date = startDate + 5 * 60
(Note, the order is specific here: The date on the left side of the +
and the seconds on the right side.)
You can also use addingTimeInterval
, if you’d prefer:
let date = startDate.addingTimeInterval(5 * 60)
Bottom line, +
/addingTimeInterval
is easiest for simple scenarios, but if you ever want to add larger units (e.g., days, months, etc.), you would likely want to use the calendrical calculations because those adjust for daylight savings, whereas addingTimeInterval
doesn’t.
For Swift 2 renditions, see the previous revision of this answer.
Solution 2 - Ios
You can use Calendar's method
func date(byAdding component: Calendar.Component, value: Int, to date: Date, wrappingComponents: Bool = default) -> Date?
to add any Calendar.Component
to any Date
. You can create a Date extension to add x minutes to your UIDatePicker
's date:
Xcode 8 and Xcode 9 • Swift 3.0 and Swift 4.0
extension Date {
func adding(minutes: Int) -> Date {
return Calendar.current.date(byAdding: .minute, value: minutes, to: self)!
}
}
Then you can just use the extension method to add minutes to the sender (UIDatePicker):
let section1 = sender.date.adding(minutes: 5)
let section2 = sender.date.adding(minutes: 10)
Playground testing:
Date().adding(minutes: 10) // "Jun 14, 2016, 5:31 PM"
Solution 3 - Ios
Swift 4:
// add 5 minutes to date
let date = startDate.addingTimeInterval(TimeInterval(5.0 * 60.0))
// subtract 5 minutes from date
let date = startDate.addingTimeInterval(TimeInterval(-5.0 * 60.0))
Swift 5.1:
// subtract 5 minutes from date
transportationFromDate.addTimeInterval(TimeInterval(-5.0 * 60.0))
Solution 4 - Ios
You can use in swift 4 or 5
let date = Date()
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd H:mm:ss"
let current_date_time = dateFormatter.string(from: date)
print("before add time-->",current_date_time)
//adding 5 miniuts
let addminutes = date.addingTimeInterval(5*60)
dateFormatter.dateFormat = "yyyy-MM-dd H:mm:ss"
let after_add_time = dateFormatter.string(from: addminutes)
print("after add time-->",after_add_time)
output:
before add time--> 2020-02-18 10:38:15
after add time--> 2020-02-18 10:43:15
Solution 5 - Ios
extension Date {
func withAddedMinutes(minutes: Double) -> Date {
addingTimeInterval(minutes * 60)
}
func withAddedHours(hours: Double) -> Date {
withAddedMinutes(minutes: hours * 60)
}
}
useCase
let anHourFromNow = Date().withAddedHours(hours: 1)
let aMinuteFromNow = Date().withAddedMinutes(minutes: 1)
Solution 6 - Ios
You can do date arithmetic by using NSDateComponents
. For example:
import Foundation
let comps = NSDateComponents()
comps.minute = 5
let cal = NSCalendar.currentCalendar()
let r = cal.dateByAddingComponents(comps, toDate: NSDate(), options: nil)
It is what you see when you try it in playground
Solution 7 - Ios
NSDate.init
with timeIntervalSinceNow
:
Ex:
let dateAfterMin = NSDate.init(timeIntervalSinceNow: (minutes * 60.0))
Solution 8 - Ios
Save this little extension:
extension Int {
var seconds: Int {
return self
}
var minutes: Int {
return self.seconds * 60
}
var hours: Int {
return self.minutes * 60
}
var days: Int {
return self.hours * 24
}
var weeks: Int {
return self.days * 7
}
var months: Int {
return self.weeks * 4
}
var years: Int {
return self.months * 12
}
}
Then use it intuitively like:
let threeDaysLater = TimeInterval(3.days)
date.addingTimeInterval(threeDaysLater)
Solution 9 - Ios
Swift 3:
let minutes: TimeInterval = 1 * 60
let nowPlusOne = Date() + minutes
Solution 10 - Ios
I think the simplest will be
let minutes = Date(timeIntervalSinceNow:(minutes * 60.0))
Solution 11 - Ios
In case you want unix timestamp
let now : Date = Date()
let currentCalendar : NSCalendar = Calendar.current as NSCalendar
let nowPlusAddTime : Date = currentCalendar.date(byAdding: .second, value: accessTime, to: now, options: .matchNextTime)!
let unixTime = nowPlusAddTime.timeIntervalSince1970