CODEWITHSUNDEEP
swiftnsdatensdatecomponentsnstimeinterval
Chris Redford
Chris Redford

Reputation: 17788

NSTimeInterval to Components

I'm trying to convert the Objective-C code in this answer, with the correction found in this answer, to Swift:

var theTimeInterval = NSTimeInterval()
var calendar = NSCalendar(calendarIdentifier: NSGregorianCalendar)

var date1 = NSDate()
var date2 = NSDate(timeInterval: theTimeInterval, sinceDate: date1)

var unitFlags = NSCalendarUnit(UInt.max)
var info = calendar.components(unitFlags, fromDate:date1, toDate:date2, options:0)

However, on the finial line, Xcode is giving me an inexplicable error:

Extra argument 'toDate' in call

I looked at the code for NSCalendar by command-clicking it and the function signature I'm using seems to exactly match its components method. So what am I doing wrong?

Upvotes: 3

Views: 3131

Answers (2)

Blanc
Blanc

Reputation: 175

I believe this is the correct implementation for Swift 4. Notes:

  • In components use whatever you need
  • Looks like the argument 'options' was removed (see the docs)
    var theTimeInterval = TimeInterval()
    var calendar = Calendar(identifier: .gregorian)

    var date1 = Date()
    var date2 = Date(timeInterval: theTimeInterval, since: date1)

    //NSCalendarUnit from objc are Calendar.Component in swift
    var components: Set<Calendar.Component> = [.hour, .minute, .second]
    var info = calendar.dateComponents(components,
                                       from: date1, to: date2)

Upvotes: 4

Borja Igartua
Borja Igartua

Reputation: 1

This works for me:

var info = calendar.components(unitFlags, fromDate: date1, toDate: date2, options: NSCalendarOptions(0))

You have to write the NSCalentarOptions enum.

Upvotes: -1

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