Swift convert time to time ago
In Swift5, we have RelativeDateTimeFormatter
Prior to Swift5:
I'm trying to convert time to time ago, what i wanna do is:
from 1 to 15 seconds it will say " Just now "
from 60 minutes to 119 minutes it will say " an hour ago "
from 24 hours to 47 hours it will say " Yesterday "
from 7 days to 7 days and 23 hours it will say " a week ago "
I'm not sure about my counting if am i wrong feel free to fix it for me
Here is the code
extension NSDate {
struct Date {
static let timeFormatter: NSDateFormatter = {
let df = NSDateFormatter()
df.calendar = NSCalendar(calendarIdentifier: NSCalendarIdentifierGregorian)
df.dateFormat = "h:mm a"
return df
}()
}
var time: String { return Date.timeFormatter.stringFromDate(self) }
var year: Int { return NSCalendar.autoupdatingCurrentCalendar().component(.Year, fromDate: self) }
var month: Int { return NSCalendar.autoupdatingCurrentCalendar().component(.Month, fromDate: self) }
var day: Int { return NSCalendar.autoupdatingCurrentCalendar().component(.Day, fromDate: self) }
var hour: Int { return NSCalendar.autoupdatingCurrentCalendar().component(.Hour, fromDate: self) }
var minute: Int { return NSCalendar.autoupdatingCurrentCalendar().component(.Minute, fromDate: self) }
var second: Int { return NSCalendar.autoupdatingCurrentCalendar().component(.Second, fromDate: self) }
struct DateComponents {
static let formatter: NSDateComponentsFormatter = {
let dcFormatter = NSDateComponentsFormatter()
dcFormatter.calendar = NSCalendar(identifier: NSCalendarIdentifierISO8601)!
dcFormatter.unitsStyle = .Full
dcFormatter.maximumUnitCount = 1
dcFormatter.zeroFormattingBehavior = .Default
dcFormatter.allowsFractionalUnits = false
dcFormatter.allowedUnits = [.Year, .Month, .Weekday, .Day, .Hour, .Minute, .Second]
return dcFormatter
}()
}
var elapsedTime: String {
if isecond(NSDate()) {
return "Just now"
}
if ishour(NSDate()) {
return "an hour ago"
}
if isyesterday(NSDate()) {
return "Yesterday"
}
if isweek(NSDate()) {
return "a week ago"
}
return (DateComponents.formatter.stringFromTimeInterval(NSDate().timeIntervalSinceDate(self)) ?? "") + " ago"
}
func isyesterday(date: NSDate) -> Bool {
return NSCalendar.autoupdatingCurrentCalendar().isDate(self, inSameDayAsDate: date.yesterday)
}
var yesterday: NSDate {
return NSCalendar.autoupdatingCurrentCalendar().dateWithEra(1, year: year, month: month, day: day-1, hour: 0, minute: 0, second: 0, nanosecond: 0)!
}
func isweek(date: NSDate) -> Bool {
return NSCalendar.autoupdatingCurrentCalendar().isDate(self, inSameDayAsDate: date.weekago)
}
var weekago: NSDate {
return NSCalendar.autoupdatingCurrentCalendar().dateWithEra(1, year: year, month: month, day: day-7, hour: 0, minute: 0, second: 0, nanosecond: 0)!
}
func isecond(date: NSDate) -> Bool {
return NSCalendar.autoupdatingCurrentCalendar().isDate(self, inSameDayAsDate: date.secondsago)
}
var secondsago: NSDate {
return NSCalendar.autoupdatingCurrentCalendar().dateWithEra(1, year: year, month: month, day: 0, hour: 0, minute: 0, second: second-15, nanosecond: 0)!
}
func ishour(date: NSDate) -> Bool {
return NSCalendar.autoupdatingCurrentCalendar().isDate(self, inSameDayAsDate: date.hourago)
}
var hourago: NSDate {
return NSCalendar.autoupdatingCurrentCalendar().dateWithEra(1, year: year, month: month, day: 0, hour: hour-1, minute: minute-1, second: 0, nanosecond: 0)!
}
}
here what i got in my app :
the quotes which is "an hour ago" , " Just now", etc not showing, only " Yesterday" and i'm not sure if it is from 7 days to 23 hours only!
and here is my first question link : Swift How to convert Parse createdAt time to time ago?
Please help me to fix the code, thanks to @Leo Dabus for the code.
Answer
I'll just update the Truongky's answer for Swif 3:
extension Date {
func getElapsedInterval() -> String {
let interval = Calendar.current.dateComponents([.year, .month, .day], from: self, to: Date())
if let year = interval.year, year > 0 {
return year == 1 ? "\(year)" + " " + "year ago" :
"\(year)" + " " + "years ago"
} else if let month = interval.month, month > 0 {
return month == 1 ? "\(month)" + " " + "month ago" :
"\(month)" + " " + "months ago"
} else if let day = interval.day, day > 0 {
return day == 1 ? "\(day)" + " " + "day ago" :
"\(day)" + " " + "days ago"
} else {
return "a moment ago"
}
}
}
If you prefer a localizable response instead of only english this code will do the work
extension Date {
func getElapsedInterval() -> String {
var calendar = Calendar.current
calendar.locale = Locale(identifier: Bundle.main.preferredLocalizations[0])
// IF THE USER HAVE THE PHONE IN SPANISH BUT YOUR APP ONLY SUPPORTS I.E. ENGLISH AND GERMAN
// WE SHOULD CHANGE THE LOCALE OF THE FORMATTER TO THE PREFERRED ONE
// (IS THE LOCALE THAT THE USER IS SEEING THE APP), IF NOT, THIS ELAPSED TIME
// IS GOING TO APPEAR IN SPANISH
let formatter = DateComponentsFormatter()
formatter.unitsStyle = .full
formatter.maximumUnitCount = 1
formatter.calendar = calendar
var dateString: String?
let interval = calendar.dateComponents([.year, .month, .weekOfYear, .day], from: self, to: Date())
if let year = interval.year, year > 0 {
formatter.allowedUnits = [.year] //2 years
} else if let month = interval.month, month > 0 {
formatter.allowedUnits = [.month] //1 month
} else if let week = interval.weekOfYear, week > 0 {
formatter.allowedUnits = [.weekOfMonth] //3 weeks
} else if let day = interval.day, day > 0 {
formatter.allowedUnits = [.day] // 6 days
} else {
let dateFormatter = DateFormatter()
dateFormatter.locale = Locale(identifier: Bundle.main.preferredLocalizations[0]) //--> IF THE USER HAVE THE PHONE IN SPANISH BUT YOUR APP ONLY SUPPORTS I.E. ENGLISH AND GERMAN WE SHOULD CHANGE THE LOCALE OF THE FORMATTER TO THE PREFERRED ONE (IS THE LOCALE THAT THE USER IS SEEING THE APP), IF NOT, THIS ELAPSED TIME IS GOING TO APPEAR IN SPANISH
dateFormatter.dateStyle = .medium
dateFormatter.doesRelativeDateFormatting = true
dateString = dateFormatter.string(from: self) // IS GOING TO SHOW 'TODAY'
}
if dateString == nil {
dateString = formatter.string(from: self, to: Date())
}
return dateString!
}