I need to retrieve the date from a UIDatePicker (Preferably I would also like to be specify the format as well. For example, mmdd would output the string 1209. Any string that reasonably parsed would work as well.
Thanks in advance.
You need to use the date property:
NSDate *myDate = datePicker.date;
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"cccc, MMM d, hh:mm aa"];
NSString *prettyVersion = [dateFormat stringFromDate:myDate];
BTW, it's not obvious but you can add specific non-parsed text by encompassing it inside single quotes in the format:
[dateFormat setDateFormat:#"'Game-'yyyyMMdd-HHmm'.xml'"];
NSString *filenameVersion = [dateFormat stringFromDate:myDate];
Related
I want to convert string to date. Its not working in following situation.
I am using settings application to set region. In settings, go to general, go to international, go to region format, go to spanish and then set Argentina.
After setting these parameter, I try to convert string to date. Its not converting string to date. Please help.
EDIT : This is my code.
NSDateFormatter *formatter = [[NSDateFormatter alloc] init] ;
[formatter setDateFormat:#"MM/dd/yyyy h:mma"];
NSDate *_date = [formatter dateFromString:strDate];
This document explains what you're experiencing
In short, format your date with the american locale, if you wish to display the date to a user, convert the date to a string.
For example:
NSString *strDate = #"05/29/2012 6:15PM";
NSDateFormatter *formatter = [[NSDateFormatter alloc] init] ;
[formatter setDateFormat:#"MM/dd/yyyy h:mma"];
[formatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:#"en_US"]];
NSDate *_date = [formatter dateFromString:strDate];
And to show the date to a user:
NSDateFormatter *formatter2 = [[NSDateFormatter alloc] init];
[formatter setDateStyle:NSDateFormatterShortStyle];
[formatter setTimeStyle:NSDateFormatterShortStyle];
NSString *newDate = [formatter2 stringFromDate:_date];
Date strings entering the application should typically be converted to a standard format, should you ever want to display a date to the user, you would need to format the date back to a string - think of them as seperate steps:
Get the string to a sane date format
Get the date to the users locale with the desired formatting
When you are converting a String to Date, the String must be in Spanish(Argentina) format for the NSDateFormatter to understand.
in your example, the date you passed is "05/29/2012 6:15PM"
However, in Spanish(Argentina), the date string should be "05/29/2012 6:15p.m."
If you are getting this date dynamically, best is to remove the AM/PM component in the date and try getting the Date String in 24-Hour format
I want to make date by date formatter
2012-07-12 but it display like
2012-07-11
My code:
NString * today_selected=[NSString stringWithFormat:#"%d%#%d%#%d",year_for_activated,#"-",month_for_activated,#"-",taged]; NSDateFormatter *Df=[[NSDateFormatter alloc]init];
//here year_of_=2012 and month_of_ac=7, and tag=12
but it display 2012-07-11 instead of 12.
[Df setDateFormat:#"YYYY-MM-DD" ];
NSDate *date_selected=[Df dateFromString: today_selected];
NSLog(#"today_selected:%#",date_selected);
but it display 2012-01-12
Please read the documentation which states
It uses yyyy to specify the year component. A common mistake is to use
YYYY. yyyy specifies the calendar year whereas YYYY specifies the year
(of "Week of Year"), used in the ISO year-week calendar. In most
cases, yyyy and YYYY yield the same number, however they may be
different. Typically you should use the calendar year.
Also you will note that the day is dd, NOT DD
When you find a problem like this, your first stop should be the documentation
try this:
NString *today_selected=#"2012-07-12";
NSDateFormatter *Df=[[NSDateFormatter alloc]init];
[Df setDateFormat:#"yyyy-MM-dd" ];
NSDate *date_selected=[Df dateFromString: today_selected];
NSLog(#"today_selected:%#",date_selected);
try this for get the 2012-07-12 ,this type of Formatter :
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"yyyy-MM-dd"];
NSDate *now = [[NSDate alloc] init];
NSString *theDate = [dateFormat stringFromDate:now];
I'm new to iPhone development. I want to set default date to NSDate Object as string. I don't see any easy way or method...
I think there might be a method in NSCalender? If there's such a method, please tell me.
Thanks in advance.
I'm not totally clear on what you are asking, but to create an instance of an NSDate object with the current date, one calls:
NSDate * myDate = [NSDate date];
If you are saying that you have a c-string or NSString that needs to be parsed to initialize an NSDate object, that's another question.
I have some code posted here:
How get a datetime column in SQLite with Objective C
that shows how to create NSDates from NSStrings using NSDateFormatter.
If you want to create an NSDate from a string, you need to use an NSDateFormatter to do it. It's important to note that the formatter will use the current locale's time zone when constructing the date, unless you put a time-zone in as part of the format. For more information about constructing time zones, see NSTimeZone.
For example, to create a date using the ubiquitous format '2011-01-16 00:00' in UTC, you would do:
NSDateFormatter* formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"yyyy-MM-dd HH:mm"];
// Only certain abbreviations are okay, like UTC. See docs for more info
[formatter setTimeZone:[NSTimeZone timeZoneWithAbbreviation:#"UTC"]];
NSDate* midnight_26_jan_2011_utc = [formatter dateFromString:#"2011-01-26 00:00"];
// this will display in your system locale
// (for me, it shows 2011-01-25 19:00 +0500 because I'm America/New_York time)
NSLog(#"date: %#", midnight_26_jan_2011_utc);
[formatter release];
Edit: Added time to format string.
You will need to look at the NSDate and NSDateFormatter classes. Here's a simple example of how to use them:
NSString* defaultDateString = [NSString stringWithFormat:#"2011-01-22 15:30:00"];
NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
NSDate* defaultDate = [dateFormatter dateFromString:defaultDateString];
[dateFormatter release];
and if you wanted to get the string from a date you can just use:
NSString* defaultDateString = [dateFormatter stringFromDate:defaultDate];
NSDateFormatter *DateFormatter=[[NSDateFormatter alloc] init];
[DateFormatter setTimeZone:[NSTimeZone defaultTimeZone]];
[DateFormatter setDateFormat:#"yyyy-MM-dd hh:mm:ss"]; //here,you can set the date format as you need
NSDate *now = [[[NSDate alloc] init]autorelease];
NSString *theDate = [DateFormatter stringFromDate:now];
Now, you can use the string the date. :)
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc]init]autorelease];
[dateFormatter setDateFormat:#"yyyy-mm-dd"];
NSDate *yourDate = [dateFormatter dateFromString:#"2011-01-26"];
I have this string...
2010-08-24T16:00:00-05:00
and I'd like to extract the time portion from it (i.e. 16:00) and convert it to its 12-hour equivalent (i.e. 04:00 pm). I'm trying to use NSDateFormatter to accomplish this, but it's not working...
NSDateFormatter* dateformatter = [[NSDateFormatter alloc] init];
[dateformatter setDateFormat:#"hh:mm a"];
NSDate *date1 = [dateformatter dateFromString:[listOfTimes objectAtIndex:0]];
[dateformatter release];
Can I use NSDateFormatter with this date format? If not, how can I extract the time and convert it to its 12-hour time equivalent?
Thanks!
The problem has to do with parsing the colon. I asked the same question and the solution is here: How to parse a date string into an NSDate object in iOS?
I think you should be able to do something like the following.
// create the date formatter object
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"yyyy-MM-dd'T'HH:mm:ss"];
NSDate* date = [formatter dateFromString:dateString];
// set up the new date format
[formatter setDateFormat:#"hh:mm:ss"];
NSString *twelveHourTime = [formatter stringFromDate:date];
[formatter release];
Update: Fixed the dateFormatter string format. I had the line below, but the Z seems to be unnecessary. Timezones always screw me up. :-/
[formatter setDateFormat:#"yyyy-MM-dd'T'HH:mm:ssZ"];
This answer needs to be updated. As of iOS 10 the system provided NSISO8601DateFormatter is available for this particular format.
How to convert NSString 2010-08-03 04:37:31.0 to August 3, 2010?
Is it possible?
This is probably a duplicate but NSDateFormatter is what you are looking for.
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"yyyy-MM-dd HH:mm:ss.S"];
NSDate *date = [dateFormatter dateFromString:inDateString];
[dateFormatter setDateFormat:#"MMMM dd',' yyyy"];
NSString *outDateString = [dateFormatter stringFromDate:date];
There are two problems with this approach though.
The input string is that it lacks timezone data
Different cultures expect a different order than Month Day Year. That can be fixed if you use one of the generic NSDateFormatterStyle formats like NSDateFormatterLongStyle.
Check out the NSDateFormatter documentation. You probably want a format string of #"%B %e, %Y" for the output.