SwiftFriendlyDate

Being a first try at creating a Swift extension, to add a friendly date formatter to the NSDate class that returns time intervals between two dates, for example:

• 30 secs
• 2 hours 22 secs
• 1 day 10 hours 15 secs

It extends the NSDate class to add two class methods:

• func friendlyIntervalBetweenDates(firstDate: NSDate, secondDate: NSDate) -> String
• func partialIntervalBetweenDates(firstDate: NSDate, secondDate:NSDate) -> String

friendlyIntervalBetweenDates(firstDate: NSDate, secondDate: NSDate) will return a full days, hours, mins and seconds string.

partialIntervalBetweenDates(firstDate: NSDate, secondDate:NSDate) will ignore seconds if the time difference is more than one minute, and ignore minutes if the difference is more than one hour - e.g.

• a difference of 1 min 20 secs will 1 min
• a difference of 1 hour 20 mins 30 seconds will return 1 hour
• a difference of 1 day 3 hours 40 mins 22 seconds will return 1 day 3 hours

Both methods handle pluralisation.

It's based on an Objective-C version, which can be found here: https://github.com/timd/FriendlyNSDate

Usage

Include FriendlyDate.swift in your project.

var firstDate = NSDate()
var secondDate = NSDate(timeInterval: (90), sinceDate: firstDate)
let response = NSDate.friendlyIntervalBetweenDates(firstDate, secondDate: secondDate)

will return

1 min 30 secs

Unit tests

SwiftFriendlyDateTests and SwiftFriendlyPartialDateTests are XCTest unit tests.