CODEWITHSUNDEEP
swifttimensdate
Xernox
Xernox

Reputation: 1736

How to get how many minutes have passed since some time mark

I would like that my app would show how much time has passed since some time mark, like Stopwatch. Should I used NSdate?

I've tried using NSDate(timeIntervalSinceReferenceDate:_) and as parameter I wanted to chose NSDate(timeIntervalSince1970: someTimeStamp) which is not allowed.

I also tried doing it manually, by converting NSTimeInterval of current time to Int like this:

var date = NSDate().timeIntervalSince1970
let time3 = Int(date)
let time4 = Int(someTimeStamp) //NSTimeInterval in Epoch time
let time5 = Double(time3 - time4)
let time6 = NSDate(timeIntervalSinceReferenceDate: time5) //This is what I need

Although now I am not sure how to properly display time6, I could do manually divide by 60 to get minutes and divide by 60 to get hours, but I am pretty sure there has to be simpler way to display how much time has passed since NSTimeInterval (preferably in mm format if below 60 minutes and in hh:mm if above 60 minutes)

Upvotes: 1

Views: 2872

Answers (3)

Rand
Rand

Reputation: 195

Thank you @Bhavuk, here's what I came up with for Swift 4

let now = Date()
let yesterday = Date.init(timeIntervalSinceNow: -86400)
let calendar = Calendar.current
let componentSet: Set = [Calendar.Component.hour, .minute, .second]
let components = calendar.dateComponents(componentSet, from: now, to: yesterday)

let seconds = components.second!
let minutes = components.minute!
let hours = components.hour!

print("Seconds: \(seconds), Minutes:\(minutes), Hours:\(hours)")

Upvotes: 1

Bhavuk Jain
Bhavuk Jain

Reputation: 2187

You can use this: (Objective C)

NSCalendar *gregorian = [[NSCalendar alloc]
                         initWithCalendarIdentifier:NSGregorianCalendar];

NSUInteger unitFlags = NSSecondCalendarUnit | NSMinuteCalendarUnit | NSHourCalendarUnit;
NSDateComponents *components = [gregorian components:unitFlags
                                            fromDate:apptDt
                                              toDate:deliveredDt options:0];
NSInteger seconds = [components second];
NSInteger minutes = [components minute];
NSInteger hours = [components hour];

Swift:

    let gregorian = NSCalendar(calendarIdentifier: NSCalendarIdentifierGregorian)

    let unitFlags:NSCalendarUnit = NSCalendarUnit.Hour.union(NSCalendarUnit.Minute).union(NSCalendarUnit.Second)

    let components = gregorian?.components(unitFlags, fromDate: apptDt, toDate:deliveredDt, options: .MatchFirst)

    let seconds = components?.second
    let minute = components?.minute
    let hour = components?.hour

    print("Second: \(seconds), Minutes:\(minute), Hour:\(hour)")

Just put starting date in 'fromDate' and 'toDate' current date.

Upvotes: 1

Bhoomi Jagani
Bhoomi Jagani

Reputation: 2423

let elapsedTime = NSDate().timeIntervalSinceDate(DateYouWantToPassToGetInterval)

Note the () after the NSDate. The NSDate() instantiates a new NSDate object, and then timeIntervalSinceDate returns the time difference between that and timeAtPress. That will return a floating point value (technically, a NSTimeInterval).

If you want that as truncated to an Int value, you can just use:

let duration = Int(elapsedTime)

Upvotes: 1

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