I know if want to display a date, that Objective-C has methods to convert the date as a string to the current locale settings. Is there an equivalent for durations? I mean something like 00:12:34 (0 hours, 12 minutes and 34 seconds) in different locales?
I think what you need is to create an NSDateFormatter and call setDateStyle: to set it to NSDateFormatterNoStyle, and then it will only show the time without showing date.
NSString *originalString = #"01:23:45";
NSDateFormatter *fromFormatter = [[NSDateFormatter alloc] init];
[fromFormatter setDateFormat:#"HH:mm:ss"];
[fromFormatter setLocale:[[[NSLocale alloc] initWithLocaleIdentifier:#"en_US"] autorelease]];
[fromFormatter setTimeZone:[NSTimeZone systemTimeZone]];
NSDate *date = [fromFormatter dateFromString:originalString];
[fromFormatter release];
NSDateFormatter *toFormatter = [[NSDateFormatter alloc] init];
[toFormatter setDateStyle:NSDateFormatterNoStyle];
[toFormatter setTimeStyle:kCFDateFormatterFullStyle];
[toFormatter setTimeZone:[NSTimeZone timeZoneWithName:#"Asia/Tokyo"]];
[toFormatter setLocale:[[[NSLocale alloc] initWithLocaleIdentifier:#"ja"] autorelease]];
NSString *s = [toFormatter stringFromDate:date];
NSLog(#"s:%#", s);
[toFormatter release];
Related
I had this code working for iOS5, but I just teste
NSDate *now = [NSDate date];
NSString *strDate = [[NSString alloc] initWithFormat:#"%#",now];
Does anyone know easy solution of rewriting this. The format of the date should be
dd mm yyyy
The correct way to format a date as a string is to use an NSDateFormatter. You can set the style to something appropriate for the user’s current locale with the -setDateStyle: method, or set the format to a particular string with -setDateFormat:.
Try this one , Definitely will get Proper solution:
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"yyyy-MM-dd"];//as per your requirement
NSDateFormatter *timeFormat = [[NSDateFormatter alloc] init];
[timeFormat setDateFormat:#"HH:mm:ss"]; //as per your requirement
NSDate *now = [[NSDate alloc] init];
NSString *theDate = [dateFormat stringFromDate:now];
NSString *theTime = [timeFormat stringFromDate:now];
NSLog(#"theDate:%# "theTime:%#" , theDate, theTime);
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
Convert NSDate to NSString
convert string to nsdate
Currently I have this code. It's for adding events to the calendar.
[...]
event.startDate = [[NSDate date] dateByAddingTimeInterval:86400];
event.endDate = [[NSDate date] dateByAddingTimeInterval:90000];
What I need is the code to add to a spesific start date and end date, and that's where NSString comes in handy. But I've had no luck converting it so far.
Refer this code :
NSString to NSDate
NSString *dateString = #"01-02-2010";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
// this is imporant - we set our input date format to match our input string
// if format doesn't match you'll get nil from your string, so be careful
[dateFormatter setDateFormat:#"dd-MM-yyyy"];
NSDate *dateFromString = [[NSDate alloc] init];
// voila!
dateFromString = [dateFormatter dateFromString:dateString];
[dateFormatter release];
NSDate convert to NSString:
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"dd-MM-yyyy"];
NSString *strDate = [dateFormatter stringFromDate:[NSDate date]];
NSLog(#"%#", strDate);
[dateFormatter release];
Hope it helps you
convert NSDate to NSString as
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateStyle:NSDateFormatterMediumStyle];
NSString *string = [dateFormatter stringFromDate:date];
[dateFormatter release];
That's an example if you need the format like “Nov 23, 1937”:
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
formatter.dateStyle= NSDateFormatterMediumStyle;
NSString* string= [formatter stringFromDate: date];
Check out the reference for other styles. If you need another style that hasn't a constant, you can use the date format, in this case it's:
formatter.dateFormat= #"MMM dd, yyyy"; // same as medium style
But the preferred way is to use the style, use the format only if there isn't a propert style.
I want to retrieve year and then month from this kind of date: 2011-12-23 10:45:01 with no luck.
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setTimeZone:[NSTimeZone timeZoneWithName:#"GMT"]];
[dateFormatter setDateFormat:#"yyyy"];
NSLog(#"Date = %#",[dateFormatter dateFromString:#"2011-12-23 10:45:01"]);
[dateFormatter release];
Date = (null), i can't understand why.
You have to do it in two steps, first match the whole date, then output the bits you want:
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setTimeZone:[NSTimeZone timeZoneWithName:#"GMT"]];
[dateFormatter setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
NSDate *date = [dateFormatter dateFromString:#"2011-12-23 10:45:01"];
//now you have the date, you can output the bits you want
[dateFormatter setDateFormat:#"yyyy"];
NSString *year = [dateFormatter stringFromDate:date];
[dateFormatter setDateFormat:#"MM"];
NSString *month = [dateFormatter stringFromDate:date];
[dateFormatter release];
This was already answered in Formatting NSDate into particular styles for both year, month, day, and hour, minute, seconds.
Specifically:
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"yyyy-MM-dd"];
NSDateFormatter *timeFormat = [[NSDateFormatter alloc] init];
[timeFormat setDateFormat:#"HH:mm:ss"];
NSDate *now = [[NSDate alloc] init];
NSString *theDate = [dateFormat stringFromDate:now];
NSString *theTime = [timeFormat stringFromDate:now];
NSLog(#"\n"
"theDate: |%#| \n"
"theTime: |%#| \n"
, theDate, theTime);
[dateFormat release];
[timeFormat release];
[now release];
I have this code to get the local date/time. It works but it seems a long way around the bush (10 statements) to get my current date/time value rather than the GMT time.
NSDate *currentDateGMT = [NSDate date];
NSDateFormatter *currentDateDateFormatter = [[NSDateFormatter alloc] init];
NSTimeZone *currentDateTimeZoneGMT = [NSTimeZone timeZoneWithName:#"GMT"];
NSLocale *locale = [[NSLocale alloc] initWithLocaleIdentifier:#"en_US_POSIX"];
[currentDateDateFormatter setTimeZone: currentDateTimeZoneGMT];
[currentDateDateFormatter setDateFormat:#"yyyy-MM-dd HH:mm"];
[currentDateDateFormatter setLocale:locale];
NSString *currentDateString = [currentDateDateFormatter stringFromDate:currentDateGMT];
NSDate *currentDateAdjusted = [currentDateDateFormatter dateFromString:currentDateString];
[currentDateDateFormatter release];
Can someone confirm that this is the best way to obtain the current machine value?
Thanks
NSDateFormatter will default to the users time zone so the simplest solution is
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
//lower case h for hour will also default to the users
//12/24 hour clock preference
[formatter setDateFormat:#"yyyy-MM-dd hh:mm"];
NSString *currentDate = [formatter stringFromDate:[NSDate date]];
[formatter release];
I want to see what is getting stored in an NSDate, so I am using NSLog, but it's showing (null), whereas if I print the string stf2, it's showing the proper value.
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"YYYY-MM-dd"];
NSDateFormatter *formatter1 = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"MMM dd, yyyy"];
NSString *stf2 = [[pact.date componentsSeparatedByString:#" "] objectAtIndex:0];
NSLog(#"date %#",stf2);
NSDate *date_ = [formatter dateFromString:stf2];
pact.date = [formatter1 stringFromDate:date_];
NSLog(#"date %#",[NSDate date_]);
There are two specific problems in the code you've presented in the question.
Format Reset
First you do,
[formatter setDateFormat:#"YYYY-MM-dd"];
and then you initialize the second formatter followed by resetting the first formatter's format,
NSDateFormatter *formatter1 = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"MMM dd, yyyy"];
To emphasize
[formatter setDateFormat:#"MMM dd, yyyy"];
This should've been formatter1 but is formatter.
Date Format
If you look at the format you've use YYYY-MM-dd, it looks fine. But apparent YYYY have a different purpose and can be different from our usual calendar year. You should use the lowercase y instead.
[formatter setDateFormat:#"yyyy-MM-dd"];
And I don't think you meant this but
NSLog(#"date %#",[NSDate date_]);
should be
NSLog(#"date %#", date_);
you need to correct the dateformatter by setting proper date formatter. first do this
[formatter setDateFormat:#"yyyy-dd-MM"];
//it should be in the way as your string is. like if your string is 2011-Jun- 27 then fromatter should be
[formatter setDateFormat:#"yyyy-MM-dd"];
set the formatter as per your string's date format. then get the date back from this line
NSDate *date_ = [formatter dateFromString:stf2];
Assuming "stf2" is your string, then perhaps your object formatter is nil.
Below functions will be helpful to you.
"getDateTimeFromString" will take date and time as argument and it will return NSDate object.\
-(NSDate *)getDateTimeFromString :(NSString *)tempDate :(NSString *)tempTime{
NSString *dateValue = [tempDate stringByAppendingFormat:#" %#",tempTime];
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
[dateFormatter setDateFormat:#"yyyy-MM-dd HH:mm"];
NSDate *date = [[NSDate alloc] init];
date = [dateFormatter dateFromString:dateValue];
NSTimeZone* sourceTimeZone = [NSTimeZone timeZoneWithAbbreviation:#"GMT"];
NSTimeZone* destinationTimeZone = [NSTimeZone systemTimeZone];
NSInteger sourceGMTOffset = [sourceTimeZone secondsFromGMTForDate:date];
NSInteger destinationGMTOffset = [destinationTimeZone secondsFromGMTForDate:date];
NSTimeInterval interval = destinationGMTOffset - sourceGMTOffset;
NSDate* destinationDate = [[[NSDate alloc] initWithTimeInterval:interval sinceDate:date] autorelease];
return date;
}
"getDateStringFromDate" will take NSDate as argument and it will return NSString.
So, you can NSLog that value.
-(NSString *)getDateStringFromDate :(NSDate *)dateValue{
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"yyyy-MM-dd"];
NSDateFormatter *timeFormat = [[NSDateFormatter alloc] init];
[timeFormat setTimeStyle:NSDateFormatterShortStyle];
[timeFormat setDateFormat:#"HH:mm a"];
NSString *theDate = [dateFormat stringFromDate:dateValue];
/*NSLog(#"\n"
"theDate: |%#| \n"
"theTime: |%#| \n"
, theDate, theTime);*/
return theDate;
}
Hope you will get the answer.