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.