I want to convert a string to an NSDate, like this:
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateStyle:NSDateFormatterFullStyle];
NSDate *createdAt = [dateFormat dateFromString:[value valueForKey:#"created_at"]];
When I log createdAt it returns nil for some reason and I can't figure out why.
[value valueForKey:#"created_at"]];
Returns a NSCFString that looks like this:
2013-05-15T05:55:57Z
I have no idea why it's nil, any help would be appreciated!
You should set date format to the NSDateFormatter first. This should be working:
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"yyyy-MM-dd'T'HH:mm:ss'Z'"];
NSDate *createdAt = [dateFormat dateFromString:[value valueForKey:#"created_at"]];
However I'm not sure about your input date string. The last letter Z should be identification of date's time zone. Letter Z is the format specifier for the time zone according to Unicode Date Format Patterns (http://www.unicode.org/reports/tr35/tr35-25.html#Date_Format_Patterns).
Related
I know this question has been asked so many time and may be duplicate of some question, actually i am trying this for storing Date into array by converting them in String. I need that Value in NSDate format so i again convert that stored string into Date.
NSDateFormatter *dateformat = [[NSDateFormatter alloc] init];
[dateformat setDateFormat:#"MM-dd-yy-hh-mm-ss"];
NSString *date = [dateformat stringFromDate:datePicker.date];
[kAppDelegate.glbArrName addObject:date];
But I get this output :
NSString *date = [kAppDelegate.glbArrDate objectAtIndex:indexPath.row];
NSLog(#"Date of birth %#",date);
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];
[dateFormatter setDateFormat:#"MM-dd-yy-hh-mm-ss"];
NSDate *birthDate = [[NSDate alloc] init];
birthDate = [dateFormatter dateFromString:date];
NSLog(#"Date of birth after formatting %#",birthDate);
Output is:
Date of birth 04-05-16-06-38-14
Date of birth after formatting 2016-04-05 01:08:14 +0000
Why it changes format, as i have done same as previous. please help me find out ..
You're rewriting the date string back into an NSDate, then printing out the NSDate, which defaults to the latter 2016-04-05 01:08:14 +0000 format as part of NSDate's -description.
I've already searched StackOverflow.com for an answer to this question, still without any success. Already looked here:
iOS - Converting time and date to user time zone
Date Format - time zone
Get current iPhone device timezone date and time from UTC-5 timezone date and time iPhone app?
IOS how to set date format
Nothing of those worked.
So I have this NSString date format: 2014-05-07T10:28:52.000Z trying to convert it to NSDate, this is what I'm using:
+ (NSDate*)stringToDate:(NSString*)string format:(NSString*)format
{
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:format];
return [dateFormatter dateFromString:string];
}
This is how I'm using it:
NSDate *date = [AppUtils stringToDate:youtube.postDate format:#"yyyy-MM-dd'T'HH:mm:ssZZZ"];
I've also tried those formats:
yyyy-MM-dd'T'HH:mm:ss.ZZZ
yyyy-MM-dd'T'HH:mm.ss.ZZZ
yyyy-MM-dd'T'HH:mm.ssZZZ
How could I convert it to NSDate successfully?
Thanks in advance!
If the date format is fixed, what I do is below.
Replace T by space
Replace Z by blank
And then do formatting...
NSString *dateReceivedInString = #"2014-05-07T10:28:52.000Z";
dateReceivedInString = [dateReceivedInString stringByReplacingOccurrencesOfString:#"T" withString:#" "];
dateReceivedInString = [dateReceivedInString stringByReplacingOccurrencesOfString:#"Z" withString:#""];
Now do the formatting using
yyyy-MM-dd HH:mm:ss
Edit 1
If you want to work with your case, use below
yyyy-MM-dd'T'HH:mm:ss.SSSZ
Edit 2
I tried this and it is working.
NSString *dateReceivedInString = #"2014-05-07T10:28:52.000Z";
dateReceivedInString = [dateReceivedInString stringByReplacingOccurrencesOfString:#"T" withString:#" "];
dateReceivedInString = [dateReceivedInString stringByReplacingOccurrencesOfString:#"Z" withString:#""];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"yyyy-MM-dd HH:mm:ss.SSS"];
NSLog(#"ddddd====%#", [dateFormatter dateFromString:dateReceivedInString]);
Edit 3
To make working with your case use below.
NSString *dateReceivedInString = #"2014-05-07T10:28:52.000Z";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"yyyy-MM-dd'T'HH:mm:ss.SSSZ"];
NSLog(#"ddddd====%#", [dateFormatter dateFromString:dateReceivedInString]);
Here are 2 methods that I use to convert RFC3339 Date string to NSDate,
And also Method for converting NSDate to RFC3339 Date string
Method for converting RFC3339 Date string to NSDate
+ (NSDate *)dateForRFC3339DateTimeString:(NSString *)rfc3339DateTimeString
{
NSDateFormatter *rfc3339DateFormatter = [[NSDateFormatter alloc] init];
[rfc3339DateFormatter setDateFormat:#"yyyy'-'MM'-'dd'T'HH':'mm':'ss'.'SSS'Z'"];
[rfc3339DateFormatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]];
// Convert the RFC 3339 date time string to an NSDate.
return [rfc3339DateFormatter dateFromString:rfc3339DateTimeString];}
Method for converting NSDate to RFC3339 Date string
+ (NSString *)RFC3339DateTimeFromDate:(NSDate *)aDate
{
NSDateFormatter *rfc3339DateFormatter = [[NSDateFormatter alloc] init];
[rfc3339DateFormatter setDateFormat:#"yyyy'-'MM'-'dd'T'HH':'mm':'ss'.'SSS'Z'"];
[rfc3339DateFormatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]];
return [rfc3339DateFormatter stringFromDate:aDate];
}
I would like to format a date to display in a uitableview custom cell
The data is passed into the app from a CMS - it is provided as a string in the following format and stored in a date type variable-
2014-04-15 10:10:45 +0000
Our app will initially be UK based - so I need to convert the format into DD/MM/YYYY format.
I tried the following code to parse my date (dateadded which is of type date).
NSDateFormatter *formatter = [NSDateFormatter new];
cellRecP.artDate.text = [formatter stringFromDate:resItem.dateadded];
but this just returns null - i guess the date format provided above is not anything that stringfromdate understands - is there any other way to format date?
Use an 'NSDateFormatter'
NSDateFormatter* newFormatter = [[[NSDateFormatter alloc] init] autorelease];
with this format to parse the string
[newFormatter setDateFormat:#"yyyy-MM-dd hh:mm:ss zzz"];
NSDate* aDate = [newFormatter dateFromString:dateString];
and you should get a valid 'NSDate' object
Try This and also Checkout this All Formate It is really good and helpful.
NSString *yourString = #"2014-04-15 10:10:45 +0000";
NSDateFormatter *df = [[NSDateFormatter alloc]init];
[df setTimeZone:[NSTimeZone systemTimeZone]];//Set Your Timezone
[df setDateFormat:#"yyyy-MM-dd HH:mm:ss Z"];//You have to set this formate.
NSDate *dd = [df dateFromString:yourString];//This will convert into date;
//Now you can set your formate.
[df setDateFormat:#"dd/MM/yyyy"];
NSString *str = [df stringFromDate:dd];
You need an NSDateFormatter and a proper unicode parse string. NSDateFormatter by default automatically checks the device locale setting the correct output.
This is an example from some code of mine:
NSDateFormatter *dateWriter = [[NSDateFormatter alloc] init];
dateWriter.dateFormat = #"yyyy'-'MM'-'dd' 'HH':'mm':'ss' 'ZZZ";
dateWriter.dateStyle = NSDateFormatterMediumStyle;
dateWriter.timeStyle = NSDateFormatterMediumStyle;
Pay attention that date formatters are pretty expensive to create.
I have this string date:
2014-04-21T07:55:13Z
when I convert that to NSDate I have the hour like 6:55... 1 hours less. WHY?
This is the code I am using to convert:
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"yyyy-MM-dd'T'HH:mm:ss'Z'"];
NSDate *newDate = [dateFormatter dateFromString:dateStr];
newDate is now 2014-04-21 06:55:13 +0000 !!!???
what is wrong?
NOTE: That one hour less would make sense if the date was my local time (GMT+1) being converted to GMT. But if that Z is zero offset ( = GMT) the date is already GMT.
I don't think your code is wrong. using this code:-
NSString *dateStr = #"2014-04-21T07:55:13Z";
// Convert string to date object
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"yyyy-MM-dd'T'HH:mm:ss'Z'"];
NSDate *date = [dateFormat dateFromString:dateStr];
NSLog(#" date log %#",date); //2014-04-21 02:25:13 +0000 output
// Convert date object to desired output format
[dateFormat setDateFormat:#"yyyy-MM-dd'T'HH:mm:ss'Z'"];
dateStr = [dateFormat stringFromDate:date];
NSLog(#"string %#",dateStr); //2014-04-21T07:55:13Z output
but NSLog of NSDATE is not output correct according to this NSDate Format outputting wrong date so your code is right.
The NSDate doesn't know anything about formatting (just date information), and the NSDateFormatter doesnt really know anything about dates, just how to format them. So you have to use methods like -stringFromDate: for know that is current or not to actually format the date for pretty human-readable display.
NSLog(#" date is %#",[dateFormat stringFromDate:date]);
I have a string:
stringValue = 2013-06-11 06:01:28.
When i try to convert it using NSDateFormatter it becomes like this: date = 2013-06-10 22:01:28 +0000.
I've read that they are the same point in time. In fact when i get the string value of the date, i get the string above.
If they're the same, is there a way to have a date with value equal to my string above? Can i have an NSDate *date = 2013-06-11 06:01:28? If yes, how can I do that?
It happen because when you convert string to date it convert to GMT time format
if you want date same as your string value than you have to set your stadard local time
Like
NSDate *date=[[NSDate alloc]init];
NSDateFormatter *timeFormat = [[NSDateFormatter alloc] init];
[timeFormat setTimeZone:[NSTimeZone timeZoneWithName:#"Asia/Kolkata"]];
[timeFormat setDateFormat:#"yyyy-MM-dd HH:mm:ss'"];
date = [timeFormat dateFromString:#"2013-06-11 06:01:28"];
hope it may help you
Use this formatter:
NSDateFormatter* f = [[[NSDateFormatter alloc] init] autorelease];
[f setDateFormat:#"yyyy-MM-dd hh:mm:ss"];