问题
I want to convert nsdate in to relative format like "Today","Yesterday","a week ago","a month ago","a year ago","date as it is".
I have written following method for it.. but some how its just printing as it is date.. can you please tell me what should be the problem?
//Following is my function which converts the date into relative string
+(NSString *)getDateDiffrence:(NSDate *)strDate{
NSDateFormatter *df = [[NSDateFormatter alloc] init];
df.timeStyle = NSDateFormatterMediumStyle;
df.dateStyle = NSDateFormatterShortStyle;
df.doesRelativeDateFormatting = YES;
NSLog(@"STRING DATEEE : %@ REAL DATE TODAY %@",[df stringFromDate:strDate],[NSDate date]);
return [df stringFromDate:strDate];
}
I have date string with the following format "2013-10-29T09:38:00"
When I tried to give the NSDate object then its always return me null date.
so I tried to convert that date in to yyyy-MM-dd HH:mm:ssZZZZ then I pass this date to function then it's just printing whole date..
How to solve this problem?
//Following is the code I call the above function
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ss"];
NSDate *date = [formatter dateFromString:[threadDict objectForKey:@"lastMessageDate"]];
[formatter setDateFormat:@"yyyy-MM-dd HH:mm:ssZZZZ"];
NSString *date1 = [formatter stringFromDate:date];
NSDate *date_d = [formatter dateFromString:date1];
NSString *resultstr=[UserManager getDateDiffrence:date];
self.dateLabel.text=resultstr;
回答1:
For simplicity I'm assuming that the dates you are formatting are all in the past (no "tomorrow" or "next week"). It's not that it can't be done but it would be more cases to deal with and more strings to return.
You can use components:fromDate:toDate:options: with whatever combination of date components you are looking for to get the number of years, months, weeks, days, hours, etc. between two dates. By then going though them in order from most significant (e.g. year) to least significant (e.g. day), you can format a string based only on the most significant component.
For example: a date that is 1 week, 2 days and 7 hours ago would be formatted as "1 week".
If you want to create special strings for a special number of a unit, like "tomorrow" for "1 day ago" then you can check the value of that component after you have determined that it is the most significant component.
The code would look something like this:
- (NSString *)relativeDateStringForDate:(NSDate *)date
{
NSCalendarUnit units = NSCalendarUnitDay | NSCalendarUnitWeekOfYear |
NSCalendarUnitMonth | NSCalendarUnitYear;
// if `date` is before "now" (i.e. in the past) then the components will be positive
NSDateComponents *components = [[NSCalendar currentCalendar] components:units
fromDate:date
toDate:[NSDate date]
options:0];
if (components.year > 0) {
return [NSString stringWithFormat:@"%ld years ago", (long)components.year];
} else if (components.month > 0) {
return [NSString stringWithFormat:@"%ld months ago", (long)components.month];
} else if (components.weekOfYear > 0) {
return [NSString stringWithFormat:@"%ld weeks ago", (long)components.weekOfYear];
} else if (components.day > 0) {
if (components.day > 1) {
return [NSString stringWithFormat:@"%ld days ago", (long)components.day];
} else {
return @"Yesterday";
}
} else {
return @"Today";
}
}
If your dates could also be in the future then you can check the absolute value of the components in the same order and then check if it's positive or negative to return the appropriate strings. I'me only showing the year below:
if ( abs(components.year > 0) ) {
// year is most significant component
if (components.year > 0) {
// in the past
return [NSString stringWithFormat:@"%ld years ago", (long)components.year];
} else {
// in the future
return [NSString stringWithFormat:@"In %ld years", (long)components.year];
}
}
回答2:
Here's my answer (in Swift 3!) and why it's better.
Answer:
func datePhraseRelativeToToday(from date: Date) -> String {
// Don't use the current date/time. Use the end of the current day
// (technically 0h00 the next day). Apple's calculation of
// doesRelativeDateFormatting niavely depends on this start date.
guard let todayEnd = dateEndOfToday() else {
return ""
}
let calendar = Calendar.autoupdatingCurrent
let units = Set([Calendar.Component.year,
Calendar.Component.month,
Calendar.Component.weekOfMonth,
Calendar.Component.day])
let difference = calendar.dateComponents(units, from: date, to: todayEnd)
guard let year = difference.year,
let month = difference.month,
let week = difference.weekOfMonth,
let day = difference.day else {
return ""
}
let timeAgo = NSLocalizedString("%@ ago", comment: "x days ago")
let dateFormatter: DateFormatter = {
let formatter = DateFormatter()
formatter.locale = Locale.autoupdatingCurrent
formatter.dateStyle = .medium
formatter.doesRelativeDateFormatting = true
return formatter
}()
if year > 0 {
// sample output: "Jan 23, 2014"
return dateFormatter.string(from: date)
} else if month > 0 {
let formatter = DateComponentsFormatter()
formatter.unitsStyle = .brief // sample output: "1mth"
formatter.allowedUnits = .month
guard let timePhrase = formatter.string(from: difference) else {
return ""
}
return String(format: timeAgo, timePhrase)
} else if week > 0 {
let formatter = DateComponentsFormatter()
formatter.unitsStyle = .brief; // sample output: "2wks"
formatter.allowedUnits = .weekOfMonth
guard let timePhrase = formatter.string(from: difference) else {
return ""
}
return String(format: timeAgo, timePhrase)
} else if day > 1 {
let formatter = DateComponentsFormatter()
formatter.unitsStyle = .abbreviated; // sample output: "3d"
formatter.allowedUnits = .day
guard let timePhrase = formatter.string(from: difference) else {
return ""
}
return String(format: timeAgo, timePhrase)
} else {
// sample output: "Yesterday" or "Today"
return dateFormatter.string(from: date)
}
}
func dateEndOfToday() -> Date? {
let calendar = Calendar.autoupdatingCurrent
let now = Date()
let todayStart = calendar.startOfDay(for: now)
var components = DateComponents()
components.day = 1
let todayEnd = calendar.date(byAdding: components, to: todayStart)
return todayEnd
}
Remember to reuse your formatters to avoid any performance hit! Hint: extensions on DateFormatter and DateComponentsFormatter are good ideas.
Why it's better:
- Utilizes DateFormatter's "Yesterday" and "Today". This is already translated by Apple, which saves you work!
- Uses DateComponentsFormatter's already translated "1 week" string. (Again less work for you, courtesy of Apple.) All you have to do is translate the "%@ ago" string. 🙂
- The other answers incorrectly calculate the time when the day switches from "today" to "yesterday" to etc. Fixed constants are a big NO-NO because reasons. Also, the other answers use the current date/time when they should use the end of the current day's date/time.
- Uses autoupdatingCurrent for Calendar & Locale which ensures your app is immediately up to date with the user's calendar and language preferences in Settings.app
This answer was inspired by DateTools on GitHub.
回答3:
Swift update, thanks to objective-c answer of David Rönnqvist, it will work for the past dates.
func relativeDateStringForDate(date : NSDate) -> NSString {
let todayDate = NSDate()
let units: NSCalendarUnit = [.Hour, .Day, .Month, .Year, .WeekOfYear]
let components = NSCalendar.currentCalendar().components(units, fromDate: date , toDate: todayDate, options: NSCalendarOptions.MatchFirst )
let year = components.year
let month = components.month
let day = components.day
let hour = components.hour
let weeks = components.weekOfYear
// if `date` is before "now" (i.e. in the past) then the components will be positive
if components.year > 0 {
return NSString.init(format: "%d years ago", year);
} else if components.month > 0 {
return NSString.init(format: "%d months ago", month);
} else if components.weekOfYear > 0 {
return NSString.init(format: "%d weeks ago", weeks);
} else if (components.day > 0) {
if components.day > 1 {
return NSString.init(format: "%d days ago", day);
} else {
return "Yesterday";
}
} else {
return NSString.init(format: "%d hours ago", hour);
}
}
回答4:
FOR: SWIFT 3
Here's a Swift 3 version, for past dates, that handles all units and singular or plural in the returned String.
Example Use:
let oneWeekAgo = Calendar.current.date(byAdding: .weekOfYear, value: -1, to: Date())!
print(relativePast(for: oneWeekAgo)) // output: "1 week ago"
I based it on a riff off of Saurabh Yadav's. Thanks.
func relativePast(for date : Date) -> String {
let units = Set<Calendar.Component>([.year, .month, .day, .hour, .minute, .second, .weekOfYear])
let components = Calendar.current.dateComponents(units, from: date, to: Date())
if components.year! > 0 {
return "\(components.year!) " + (components.year! > 1 ? "years ago" : "year ago")
} else if components.month! > 0 {
return "\(components.month!) " + (components.month! > 1 ? "months ago" : "month ago")
} else if components.weekOfYear! > 0 {
return "\(components.weekOfYear!) " + (components.weekOfYear! > 1 ? "weeks ago" : "week ago")
} else if (components.day! > 0) {
return (components.day! > 1 ? "\(components.day!) days ago" : "Yesterday")
} else if components.hour! > 0 {
return "\(components.hour!) " + (components.hour! > 1 ? "hours ago" : "hour ago")
} else if components.minute! > 0 {
return "\(components.minute!) " + (components.minute! > 1 ? "minutes ago" : "minute ago")
} else {
return "\(components.second!) " + (components.second! > 1 ? "seconds ago" : "second ago")
}
}
回答5:
To avoid the 24-hour problem mentioned by Budidino to David's answer, I altered it to like this below -
- (NSString *)relativeDateStringForDate:(NSDate *)date
{
NSCalendarUnit units = NSDayCalendarUnit | NSWeekOfYearCalendarUnit |
NSMonthCalendarUnit | NSYearCalendarUnit ;
NSCalendar *cal = [NSCalendar currentCalendar];
NSDateComponents *components1 = [cal components:(NSCalendarUnitEra|NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay) fromDate:[NSDate date]];
NSDate *today = [cal dateFromComponents:components1];
components1 = [cal components:(NSCalendarUnitEra|NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay) fromDate:date];
NSDate *thatdate = [cal dateFromComponents:components1];
// if `date` is before "now" (i.e. in the past) then the components will be positive
NSDateComponents *components = [[NSCalendar currentCalendar] components:units
fromDate:thatdate
toDate:today
options:0];
if (components.year > 0) {
return [NSString stringWithFormat:@"%ld years ago", (long)components.year];
} else if (components.month > 0) {
return [NSString stringWithFormat:@"%ld months ago", (long)components.month];
} else if (components.weekOfYear > 0) {
return [NSString stringWithFormat:@"%ld weeks ago", (long)components.weekOfYear];
} else if (components.day > 0) {
if (components.day > 1) {
return [NSString stringWithFormat:@"%ld days ago", (long)components.day];
} else {
return @"Yesterday";
}
} else {
return @"Today";
}
}
Basically, it creates 2 new dates without time pieces included.Then the comparison is done for "days" difference.
回答6:
check NSDate-TimeAgo, it also supports multiple languages.
回答7:
You will need to work out this logic yourself. You will need to determine the number of days in between those two dates.
Here is a relatively naive approach:
+ (NSString *) dateDifference:(NSDate *)date
{
const NSTimeInterval secondsPerDay = 60 * 60 * 24;
NSTimeInterval diff = [date timeIntervalSinceNow] * -1.0;
// if the difference is negative, then the given date/time is in the future
// (because we multiplied by -1.0 to make it easier to follow later)
if (diff < 0)
return @"In the future";
diff /= secondsPerDay; // get the number of days
// if the difference is less than 1, the date occurred today, etc.
if (diff < 1)
return @"Today";
else if (diff < 2)
return @"Yesterday";
else if (diff < 8)
return @"Last week";
else
return [date description]; // use a date formatter if necessary
}
It is naive for a number of reasons:
- It doesn't take into account leap days
- It assumes there are 86400 seconds in a day (there is such a thing as leap seconds!)
However, this should at least help you head in the right direction. Also, avoid using get in method names. Using get in a method name typically indicates that the caller must provide their own output buffer. Consider NSArray's method, getItems:range:, and NSString's method, getCharacters:range:.
回答8:
NSString* AgoStringFromTime(NSDate* dateTime)
{
NSDictionary *timeScale = @{@"sec" :@1,
@"min" :@60,
@"hr" :@3600,
@"day" :@86400,
@"week" :@605800,
@"month":@2629743,
@"year" :@31556926};
NSString *scale;
int timeAgo = 0-(int)[dateTime timeIntervalSinceNow];
if (timeAgo < 60) {
scale = @"sec";
} else if (timeAgo < 3600) {
scale = @"min";
} else if (timeAgo < 86400) {
scale = @"hr";
} else if (timeAgo < 605800) {
scale = @"day";
} else if (timeAgo < 2629743) {
scale = @"week";
} else if (timeAgo < 31556926) {
scale = @"month";
} else {
scale = @"year";
}
timeAgo = timeAgo/[[timeScale objectForKey:scale] integerValue];
NSString *s = @"";
if (timeAgo > 1) {
s = @"s";
}
return [NSString stringWithFormat:@"%d %@%@", timeAgo, scale, s];
}
回答9:
Here is code I created for my use:
+ (NSString*) getTimestampForDate:(NSDate*)date {
NSDate* sourceDate = date;
// Timezone Offset compensation (optional, if your target users are limited to a single time zone.)
NSTimeZone* sourceTimeZone = [NSTimeZone timeZoneWithName:@"America/New_York"];
NSTimeZone* destinationTimeZone = [NSTimeZone systemTimeZone];
NSInteger sourceGMTOffset = [sourceTimeZone secondsFromGMTForDate:sourceDate];
NSInteger destinationGMTOffset = [destinationTimeZone secondsFromGMTForDate:sourceDate];
NSTimeInterval interval = destinationGMTOffset - sourceGMTOffset;
NSDate* destinationDate = [[NSDate alloc] initWithTimeInterval:interval sinceDate:sourceDate];
// Timestamp calculation (based on compensation)
NSCalendar* currentCalendar = [NSCalendar currentCalendar];
NSCalendarUnit unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit;
NSDateComponents *differenceComponents = [currentCalendar components:unitFlags fromDate:destinationDate toDate:[NSDate date] options:0];//Use `date` instead of `destinationDate` if you are not using Timezone offset correction
NSInteger yearDifference = [differenceComponents year];
NSInteger monthDifference = [differenceComponents month];
NSInteger dayDifference = [differenceComponents day];
NSInteger hourDifference = [differenceComponents hour];
NSInteger minuteDifference = [differenceComponents minute];
NSString* timestamp;
if (yearDifference == 0
&& monthDifference == 0
&& dayDifference == 0
&& hourDifference == 0
&& minuteDifference <= 2) {
//"Just Now"
timestamp = @"Just Now";
} else if (yearDifference == 0
&& monthDifference == 0
&& dayDifference == 0
&& hourDifference == 0
&& minuteDifference < 60) {
//"13 minutes ago"
timestamp = [NSString stringWithFormat:@"%ld minutes ago", (long)minuteDifference];
} else if (yearDifference == 0
&& monthDifference == 0
&& dayDifference == 0
&& hourDifference == 1) {
//"1 hour ago" EXACT
timestamp = @"1 hour ago";
} else if (yearDifference == 0
&& monthDifference == 0
&& dayDifference == 0
&& hourDifference < 24) {
timestamp = [NSString stringWithFormat:@"%ld hours ago", (long)hourDifference];
} else {
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setLocale:[NSLocale currentLocale]];
NSString* strDate, *strDate2 = @"";
if (yearDifference == 0
&& monthDifference == 0
&& dayDifference == 1) {
//"Yesterday at 10:23 AM", "Yesterday at 5:08 PM"
[formatter setDateFormat:@"hh:mm a"];
strDate = [formatter stringFromDate:date];
timestamp = [NSString stringWithFormat:@"Yesterday at %@", strDate];
} else if (yearDifference == 0
&& monthDifference == 0
&& dayDifference < 7) {
//"Tuesday at 7:13 PM"
[formatter setDateFormat:@"EEEE"];
strDate = [formatter stringFromDate:date];
[formatter setDateFormat:@"hh:mm a"];
strDate2 = [formatter stringFromDate:date];
timestamp = [NSString stringWithFormat:@"%@ at %@", strDate, strDate2];
} else if (yearDifference == 0) {
//"July 4 at 7:36 AM"
[formatter setDateFormat:@"MMMM d"];
strDate = [formatter stringFromDate:date];
[formatter setDateFormat:@"hh:mm a"];
strDate2 = [formatter stringFromDate:date];
timestamp = [NSString stringWithFormat:@"%@ at %@", strDate, strDate2];
} else {
//"March 24 2010 at 4:50 AM"
[formatter setDateFormat:@"d MMMM yyyy"];
strDate = [formatter stringFromDate:date];
[formatter setDateFormat:@"hh:mm a"];
strDate2 = [formatter stringFromDate:date];
timestamp = [NSString stringWithFormat:@"%@ at %@", strDate, strDate2];
}
}
return timestamp;
}
回答10:
This is just a copy of a previous answer but it returns Just now if it is less than five seconds.
func relativePast(for date : Date) -> String {
let units = Set<Calendar.Component>([.year, .month, .day, .hour, .minute, .second, .weekOfYear])
let components = Calendar.current.dateComponents(units, from: date, to: Date())
if components.year! > 0 {
return "\(components.year!) " + (components.year! > 1 ? "years ago" : "year ago")
} else if components.month! > 0 {
return "\(components.month!) " + (components.month! > 1 ? "months ago" : "month ago")
} else if components.weekOfYear! > 0 {
return "\(components.weekOfYear!) " + (components.weekOfYear! > 1 ? "weeks ago" : "week ago")
} else if (components.day! > 0) {
return (components.day! > 1 ? "\(components.day!) days ago" : "Yesterday")
} else if components.hour! > 0 {
return "\(components.hour!) " + (components.hour! > 1 ? "hours ago" : "hour ago")
} else if components.minute! > 0 {
return "\(components.minute!) " + (components.minute! > 1 ? "minutes ago" : "minute ago")
} else {
return "\(components.second!) " + (components.second! > 5 ? "seconds ago" : "Just Now".replacingOccurrences(of: "0", with: "")
}
}
回答11:
The problem with doesRelativeDateFormatting is that it's pretty much limited to Yesterday, Today, Tomorrow. If you're looking for something more thorough, then take a look at the answers here.
回答12:
Complate Code If Futures Dates
NSCalendarUnit units = NSCalendarUnitDay | NSCalendarUnitWeekOfYear |
NSCalendarUnitMonth | NSCalendarUnitYear;
NSDateComponents *components = [[NSCalendar currentCalendar] components:units fromDate:date toDate:[NSDate date] options:0];
if (components.year < 0) {
return [NSString stringWithFormat:@"%ld years from now", labs((long)components.year)];
} else if (components.month < 0) {
return [NSString stringWithFormat:@"%ld months from now", labs((long)components.month)];
} else if (components.weekOfYear < 0) {
return [NSString stringWithFormat:@"%ld weeks from now", labs((long)components.weekOfYear)];
} else if (components.day < 0) {
if (components.day < 1) {
return [NSString stringWithFormat:@"%ld days from now", labs((long)components.day)];
} else {
return @"Tomorrow";
}
}
else if (components.year > 0) {
return [NSString stringWithFormat:@"%ld years ago", (long)components.year];
} else if (components.month > 0) {
return [NSString stringWithFormat:@"%ld months ago", (long)components.month];
} else if (components.weekOfYear > 0) {
return [NSString stringWithFormat:@"%ld weeks ago", (long)components.weekOfYear];
} else if (components.day > 0) {
if (components.day > 1) {
return [NSString stringWithFormat:@"%ld days ago", (long)components.day];
} else {
return @"Yesterday";
}
} else {
return @"Today";
}
回答13:
I have attached demo here please find on this link. TimestampAgo-Demo
Thanks to n00bprogrammer
Edit :- I made changes in Sourcetimezone with [NSTimeZone systemTimeZone] because due to static time zone , issue occure in GMT or UTC format. (second goes in minus) and change deprecated Methods.
回答14:
Here is my solution in Swift 2 that avoid 24-hour problem by comparing two dates with a zero time.
extension NSDate {
private func dateWithZeroTime(date: NSDate) -> NSDate? {
let calendar = NSCalendar.currentCalendar()
let units: NSCalendarUnit = [.Day, .WeekOfYear, .Month, .Year]
let components = calendar.components(units, fromDate: date)
return calendar.dateFromComponents(components)
}
private func thisDay() -> NSDate? {
return self.dateWithZeroTime(self)
}
private func today() -> NSDate? {
return self.dateWithZeroTime(NSDate())
}
var relativeFormat: String? {
let today = self.today()
let thisDay = self.thisDay()
let formatter = NSDateFormatter()
formatter.dateStyle = NSDateFormatterStyle.LongStyle
let dateString = formatter.stringFromDate(self)
if nil != thisDay && nil != today {
let units: NSCalendarUnit = [.Day, .WeekOfYear, .Month, .Year]
let components = NSCalendar.currentCalendar().components(units, fromDate: thisDay!, toDate: today!, options: [])
if (components.year > 0) {
return components.year == 1 ? "A year ago, \(dateString)" : "\(components.year) years ago, \(dateString)"
} else if (components.month > 0) {
return components.month == 1 ? "A month ago, \(dateString)" : "\(components.month) months ago, \(dateString)"
} else if (components.weekOfYear > 0) {
return components.weekOfYear == 1 ? "A week ago, \(dateString)" : "\(components.weekOfYear) weeks ago, \(dateString)"
} else if (components.day > 0) {
return components.day == 1 ? "Yesterday, \(dateString)" : "\(self.dayOfTheWeek()), \(dateString)"
} else {
return "Today"
}
}
return nil
}
func dayOfTheWeek() -> String {
let weekdays = [
"Sunday",
"Monday",
"Tuesday",
"Wednesday",
"Thursday",
"Friday",
"Saturday"
]
let calendar: NSCalendar = NSCalendar.currentCalendar()
let components: NSDateComponents = calendar.components(.Weekday, fromDate: self)
return weekdays[components.weekday - 1]
}
}
回答15:
let formatter = DateComponentsFormatter()
formatter.unitsStyle = .full
let now = NSDate()
let dateMakerFormatter = DateFormatter()
dateMakerFormatter.dateFormat = "yyyy/MM/dd HH:mm:ss z"
let dateString = "2017-03-13 10:38:54 +0000"
let stPatricksDay = dateMakerFormatter.date(from: dateString)!
let calendar = NSCalendar.current
let components = calendar.dateComponents([.hour, .minute,.weekOfMonth,.day,.year,.month,.second], from: stPatricksDay, to: now as Date)
if components.year! > 0 {
formatter.allowedUnits = .year
} else if components.month! > 0 {
formatter.allowedUnits = .month
} else if components.weekOfMonth! > 0 {
formatter.allowedUnits = .weekOfMonth
} else if components.day! > 0 {
formatter.allowedUnits = .day
} else if components.hour! > 0 {
formatter.allowedUnits = .hour
} else if components.minute! > 0 {
formatter.allowedUnits = .minute
} else {
formatter.allowedUnits = .second
}
let formatString = NSLocalizedString("%@ ago", comment: "Used to say how much time has passed. e.g. '2 hours ago'")
let timeString = formatter.string(from: components)
String(format: formatString, timeString!)
回答16:
To format the given "sourceDate" as "5:56 pm" for today, "yesterday" for any time yesterday, "January 16" for any day in the same year and "January 16, 2014". I am posting my own method.
sourceDate = //some date that you need to take into consideration
NSDateComponents *components = [[NSCalendar currentCalendar] components:NSCalendarUnitMinute | NSCalendarUnitHour | NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear fromDate:[NSDate date]];
NSDateComponents *sourceDateComponents = [[NSCalendar currentCalendar] components:NSCalendarUnitMinute | NSCalendarUnitHour | NSCalendarUnitDay | NSCalendarUnitMonth | NSCalendarUnitYear fromDate: sourceDate];
NSString* timestamp;
NSDateFormatter *formatSourceDate = [NSDateFormatter new];
[formatSourceDate setAMSymbol:@"AM"];
[formatSourceDate setPMSymbol:@"PM"];
//same day - time in h:mm am/pm
if (components.day == sourceDateComponents.day) {
NSLogInfo(@"time");
[formatSourceDate setDateFormat:@"h:mm a"];
timestamp = [NSString stringWithFormat:@"%@",[formatSourceDate stringFromDate:date]];
return timestamp;
}
else if (components.day - sourceDateComponents.day == 1) {
//yesterday
timestamp = NSLocalizedString(@"Yesterday", nil);
return timestamp;
}
if (components.year == sourceDateComponents.year) {
//september 29, 5:56 pm
[formatSourceDate setDateFormat:@"MMMM d"];
timestamp = [NSString stringWithFormat:@"%@",[formatSourceDate stringFromDate:date]];
return timestamp;
}
[formatSourceDate setDateFormat:@"MMMM d year"];
timestamp = [NSString stringWithFormat:@"%@",[formatSourceDate stringFromDate:date]];
return timestamp;
NSLogInfo(@"Timestamp : %@",timestamp);
来源：https://stackoverflow.com/questions/20487465/how-to-convert-nsdate-in-to-relative-format-as-today-yesterday-a-week-ago