I'm trying to take a NSString date in the format "2/22/11" and convert it to this format: 2011-02-22
This is my code:
NSDate *dateTemp = [[NSDate alloc] init];
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"yyyy-MM-dd"];
dateTemp = [dateFormat dateFromString:newInvoice.date];
newInvoice.date = [dateFormat stringFromDate:dateTemp];
newInvoice.date starts as an NSString equal to "2/22/11". dateTemp ends up NIL. newInvoice.date ends up NIL as well.
I can't for the life of me figure out why.
You are facing this problem because your date formatter is not correct.Suppose your newInvoice.date variable store "11:02:23" the your dateFormatter should be #"yy:MM:dd" and if your newInvoice.date variable store"2/22/11" then your dateFormatter should be #"MM/dd/yy"
NSDate *dateTemp = [[NSDate alloc] init];
NSDateFormatter *dateFormat1 = [[NSDateFormatter alloc] init];
NSDateFormatter *dateFormat2 = [[NSDateFormatter alloc] init];
[dateFormat1 setDateFormat:#"MM/dd/yy"];
[dateFormat2 setDateFormat:#"yyyy-MM-dd"];
dateTemp = [dateFormat1 dateFromString:newInvoice.date];
newInvoice.date = [dateFormat2 stringFromDate:dateTemp];
both format should be according to your requirement to get the correct result
This should work fine. I have set Date style. You can change NSDateFormatterShortStyle to something else. Also check your newInvoice.date format.
NSDate *dateTemp = [[NSDate alloc] init];
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateStyle: NSDateFormatterShortStyle];
dateTemp = [dateFormat dateFromString: newInvoice.date];
[dateFormat setDateFormat:#"yyyy-MM-dd"];
newInvoice.date = [dateFormat stringFromDate:dateTemp];
Related
I have a string like "20121124T103000" and I want to convert this to NSDate.
I tried converting it with dateFormatter date format "yyyyMMddThhmmss" but it gives output as 2001-01-01 00:00:00 +0000 which is incorrect.
What is the way we can convert this string to NSDate?
Here is my code:
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"yyyyMMddThhmmss"];
NSLog(#"%#",[dateFormat dateFromString:#"20121124T103000"]);
Any help is appreciated.
Your original code is quite close; instead of:
#"yyyyMMddThhmmss"
You should be using:
#"yyyyMMdd'T'hhmmss"
The only difference is the pair of single quotes around the 'T' in the string- you just need to let the app know that 'T' is a part of the formatting, not the actual date.
do like this,
NSString *dateStr = #"20121124T103000";
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"yyyyMMdd'T'hhmmss"];
NSDate *d = [dateFormat dateFromString:dateStr];
NSString *st = [dateFormat stringFromDate:d];
NSLog(#"%#",st);
Try the following Code.
NSString *dateStr = #"20121124T103000";
NSDateFormatter *dtF = [[NSDateFormatter alloc] init];
[dtF setDateFormat:#"yyyyMMdd'T'hhmmss"];
NSDate *d = [dtF dateFromString:dateStr];
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"yyyyMMdd'T'hhmmss"];
NSString *st = [dateFormat stringFromDate:d];
NSLog(#"%#",st]);
I have a NSString that keeps date:
1900-01-01T11:00:00
I need to format it, so I have a formatter:
NSDateFormatter *df = [[NSDateFormatter alloc] init];
[df setDateFormat:#"dd/MM/yyyy hh:mm:ss a"];
How to format this string now?
NSString* formatedDateString = [df ???];
Create a date formatter, that returns a date object for for the given string, create a second date formatter, that returns a string in the desired format from that date.
NSDateformatter *inputFormatter = [[NSDateformatter alloc] init];
[inputFormatter setDateFormat:#"yyyy-MM-dd'T'HH:mm:ss"];
[inputFormatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:#"en_US_POSIX"]];
NSDate *date = [inputFormatter dateFromString:dateString];
NSDateformatter *outputFormatter = [[NSDateformatter alloc] init];
[outputFormatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:#"en_US_POSIX"]];
[outputFormatter setDateFormat:#"dd/MM/yyyy hh:mm:ss a"];
NSString *outputString = [outputFormatter stringFromDate:date];
But you could also let the output date formatter decide the style in respect to the locale:
NSDateformatter *outputFormatter = [[NSDateformatter alloc] init];
[outputFormatter setDateStyle:NSDateFormatterShortStyle];
[outputFormatter setTimeStyle:NSDateFormatterShortStyle];
NSString *outputString = [outputFormatter stringFromDate:date];
for a american locale, you should now cat the desired format.
if you want to enforce format "dd/MM/yyyy hh:mm:ss a" for the user, you should also set the locale of the output date formatter.
a complete command line example.
int main(int argc, const char * argv[])
{
#autoreleasepool {
NSString *dateString1 = #"2012-12-31T11:00:00";
NSString *dateString2 = #"2012-12-31T14:00:00";
NSDateFormatter *inputFormatter = [[NSDateFormatter alloc] init];
[inputFormatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:#"en_US_POSIX"]];
[inputFormatter setDateFormat:#"yyyy-MM-dd'T'HH:mm:ss"];
NSDateFormatter *outputFormatter = [[NSDateFormatter alloc] init];
[outputFormatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:#"en_US_POSIX"]];
[outputFormatter setDateFormat:#"dd/MM/yyyy hh:mm:ss a"];
NSDate *date1 = [inputFormatter dateFromString:dateString1];
NSDate *date2 = [inputFormatter dateFromString:dateString2];
NSString *outputString1 = [outputFormatter stringFromDate:date1];
NSString *outputString2 = [outputFormatter stringFromDate:date2];
NSLog(#"%#", outputString1);
NSLog(#"%#", outputString2);
}
return 0;
}
If you dont set the locale like [outputFormatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:#"en_US_POSIX"]]; it will lead do a ugly mix of formats with user's sefault locale, if it not happend to be 'en_US'
ie in German: 31/12/2012 02:00:00 nachm. This is a format not used in german.
To support user's language and locale you should instead use the different styles.
The q&a rmaddy provided indicates, that there are rare cases, where the parse format gets rewritten. To avoid this, set the input formatted's format to a certain locale, like [inputFormatter setLocale:[[NSLocale alloc] initWithLocaleIdentifier:#"en_US_POSIX"]];
You need to create two date formatter, one for parsing, one for formatting; Your parsing format is "yyyy-MM-ddThh:mm:ss" and your output format is "dd/MM/yyyy hh:mm:ss a". So, something like this :
NSString * targetString = #"1900-01-01'T'11:00:00";
NSDateFormatter *parseFormat = [[NSDateFormatter alloc] init];
[parseFormat setDateFormat:#"yyyy-MM-ddThh:mm:ss"];
NSDate * date = [parseFormat dateFromString:targetString];
NSDateFormatter * outputFormat = [[NSDateFormatter alloc] init];
[outputFormat setDateFormat:#"dd/MM/yyyy hh:mm:ss a";
NSString * outputString = [parseFormat stringFromDate:date];
example for getting current date :
-(void) getDate
{
NSString *theDate;
NSString *theTime;
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];
theDate = [dateFormat stringFromDate:now];
theTime = [timeFormat stringFromDate:now];
//2012-09-21 02:00:00
self.deviceCurrentTime=[NSString stringWithFormat:#"%# %#",theDate,theTime];
}
For my iPhone app I got to convert NSDate object to string, and then convert the string back to NSDate object.. Can someone help me out? thank you!
Use to convert from NSDate to NSString
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"yyyy-MM-dd hh:mm:ss a"];
NSString *stringFromDate = [formatter stringFromDate:myNSDateInstance];
Use to convert from NSString to NSDate.
NSDateFormatter *df = [[NSDateFormatter alloc] init];
[df setDateFormat:#"yyyy-MM-dd hh:mm:ss a"];
NSDate *myDate = [df dateFromString: stringFromDate];
You need to check out NSDateFormatter this does exactly this, both directions.
convert NSDate to NSString
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"yyyy"];
//Optionally for time zone converstions
[formatter setTimeZone:[NSTimeZone timeZoneWithName:#"..."]];
NSString *stringFromDate = [formatter stringFromDate:myNSDateInstance];
Convert 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];
I have an array containing the String objects with this format 22/04/2011.My question is that how can I change this string into the yyyy-mm-dd format. I am using NSDateFormatter but it's not working.
The real thing to know that when you convert a string date to NSDate using NSDateFormatter using any of the above mentioned methods, you will always get the NSDate object in Local TimeZone. So when coding the method for date conversion you need to consider this factor.
Hope this helps..
-:samfisher
Try this,
NSDateFormatter *formater = [[NSDateFormatter alloc] init];
[formater setDateFormat:#"dd/mm/yyyy"];
NSDate *date2 = [formater dateFromString:#"22/04/2011"];
[formater setDateFormat:#"yyyy-mm-dd"];
NSString *result = [formater stringFromDate:date2];
NSLog(#"Date - %#",result);
And For Reference - http://iosdevelopertips.com/cocoa/date-formatters-examples-take-3.html
Here how I do this ... This code works ... Try this
NSDate* currentDate = [NSDate date];
NSDateFormatter* df = [[NSDateFormatter alloc] init];
[df setDateFormat:#"yyyy-mm-dd"];
NSString* currentDateString = [df stringFromDate:currentDate];
[df release];
NSDateFormatter *formater = [[NSDateFormatter alloc] init];
[formater setDateFormat:#"dd/mm/yyyy"];
NSDate *date2 = [formater dateFromString:#"2010-11-17"];
[formater setDateFormat:#"yyyy-mm-dd"];
NSString *result = [formater stringFromDate:date2];
I have string like #"2011-03-29 15:22:16"
and I use dateformatter to get NSdate obj.
Below is my code:
NSString *dateStr = #"2011-03-29 15:22:16";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setTimeStyle:NSDateFormatterShortStyle];
[dateFormatter setDateStyle:NSDateFormatterLongStyle];
NSLocale *usLocale = [[NSLocale alloc] initWithLocaleIdentifier:#"en_US"];
[dateFormatter setLocale:usLocale];
NSDate *date = [dateFormatter dateFromString:dateStr];
However, date is always NULL.
I tried several time&date style, and failed either.
So can this kind of string be formatted into the NSDate object?
thanks in advance!
I presume the format is incorrect. Try setting it manually.
NSString *dateStr = #"2011-03-29 15:22:16";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
NSDate *date = [dateFormatter dateFromString:dateStr];
Maybe you can try following.
mDateFormatter = [[NSDateFormatter alloc] init];
// 2010-11-11 17:26:59
[mDateFormatter setDateFormat:#"yyyy-MM-dd HH:mm:ss"];