my code is like this
NSString *tempDate = [NSString stringWithString:tempReviewData.pubDate];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateStyle:NSDateFormatterLongStyle];
[dateFormatter setTimeStyle:NSDateFormatterNoStyle];
[dateFormatter setDateFormat:#"HH:mm a"];
NSDate *newDate = [dateFormatter dateFromString:tempReviewData.pubDate];
My newDate is getting nil at this point i dont know why
It seems to work for me but it depends on the format of tempReviewData.pubDate.
When I use invalid format, like #"6:30 M", I get null as well.
This is working:
NSString *tempDate = [NSString stringWithString:#"6:30 PM"];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateStyle:NSDateFormatterLongStyle];
[dateFormatter setTimeStyle:NSDateFormatterNoStyle];
[dateFormatter setDateFormat:#"HH:mm a"];
NSDate * newDate = [dateFormatter dateFromString:tempDate];
NSString * str = [dateFormatter stringFromDate:[NSDate date]];
NSLog(#"date: %#", newDate);
NSLog(#"str: %#", str);
Output:
2010-03-08 22:36:57.904 x[4340:903] date: 1970-01-01 12:30:00 +1000
2010-03-08 22:36:57.905 x[4340:903] str: 22:36 PM
NSDate *newDate = [dateFormatter dateFromString:tempReviewData.pubDate];
Does pubDate return an NSString, or an NSDate?
If it returns a string, then you should rename that property to clearly indicate that.
If it returns a date (NSDate), then trying to parse it as a string will not work, since it is not a string; moreover, you can cut out all this formatter code, since you already have the date object you're after.
It seems the NSDateFormatter has gotten very picky.
-(void)dateFormatterTests {
NSDateFormatter *formatter;
formatter = [[NSDateFormatter alloc] init];
#ifdef WORKS
[formatter setDateFormat:#"yyyy-MM-dd"];
#elif defined(ALSO_WORKS)
[formatter setDateFormat:#"yyyy MM dd"];
[formatter setLenient:YES];
#else // DOESN'T WORK
[formatter setDateFormat:#"yyyy MM dd"];
#endif
// Works per comments above
NSLog(#"dFS: %#", [formatter dateFromString:#"2010-01-13"]);
// Never works with any of the above formats
NSLog(#"dFS: %#", [formatter dateFromString:#"2010-01-13 22:00"]);
[formatter release]; formatter = nil;
}
Related
I have one string like this "2012 12 12 12:12", how to format as a Date ?
I try this but not work
-(NSDate *)stringToDate:(NSString *)date
{
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
NSTimeZone *timeZone = [NSTimeZone localTimeZone];
[formatter setTimeZone:timeZone];
[formatter setDateFormat : #"yyyy MM dd HH:mm"];
NSString *stringTime = date;
NSDate *dateTime = [formatter dateFromString:stringTime];
[formatter release];
return dateTime;
}
Update: when I change the position of formatter, it also can not work by:
NSLog(#"%#", stringToDate(#"2012 12 12 12:12"));
It outputs "null", But it works with string format like "2012-12-12 12:12"
Change this,
[formatter setDateFormat : #"yyyy MM dd HH:mm"];
[formatter release];
NSString *stringTime = date;
NSDate *dateTime = [formatter dateFromString:stringTime];
to
[formatter setDateFormat : #"yyyy MM dd HH:mm"];
NSString *stringTime = date;
NSDate *dateTime = [formatter dateFromString:stringTime];
[formatter release];
Don't release formatter until you are done with the use of it in converting from string to date. In your code, you are releasing it before the conversion itself.
Update:
You need to use it as,
NSLog(#"%#", [self stringToDate:#"2012 12 12 12:12"]);
You can not use stringToDate(#"2012 12 12 12:12") in objective-c. Equivalent here is [self stringToDate:#"2012 12 12 12:12"].
You can use this:
NSDateFormatter *formatter = [[[NSDateFormatter alloc] init] autorelease];
instead of these two lines:
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
...
[formatter release];
If you use ARC, then no trouble to you for memory management.
EDIT: But kindly read some memory management rules and guidelines, that is a must for everyone working in cococa.
You are releasing NSDateFormatter before it is used
Use this code :-
-(NSDate *)stringToDate:(NSString *)date
{
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
NSTimeZone *timeZone = [NSTimeZone localTimeZone];
[formatter setTimeZone:timeZone];
[formatter setDateFormat : #"yyyy MM dd HH:mm"];
NSString *stringTime = date;
NSDate *dateTime = [formatter dateFromString:stringTime];
[formatter release];
return dateTime;
}
I have a UIDatePicker and I m getting the selected date from it in yyyy-MM-dd format.Now I want to convert it to MM/dd/yyyy format ..How can i do it ?
NSDateFormatter *df=[[[NSDateFormatter alloc]init] autorelease];
df.dateFormat = #"yyyy-MM-dd";
NSArray *temp=[[NSString stringWithFormat:#"%#",[df stringFromDate:DatePicker.date]] componentsSeparatedByString:#""];
[dateString2 release];
dateString2=nil;
dateString2= [[NSString alloc]initWithString:[temp objectAtIndex:0]];
NSLog(#"%#",dateString2);
Im getting 2012-10-30 but I want 10/30/2012.
See Instruction or introduction with every line
NSString *str = #"2012-10-30"; /// here this is your date with format yyyy-MM-dd
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease]; // here we create NSDateFormatter object for change the Format of date..
[dateFormatter setDateFormat:#"yyyy-MM-dd"]; //// here set format of date which is in your output date (means above str with format)
NSDate *date = [dateFormatter dateFromString: str]; // here you can fetch date from string with define format
dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
[dateFormatter setDateFormat:#"dd/MM/yyyy"];// here set format which you want...
NSString *convertedString = [dateFormatter stringFromDate:date]; //here convert date in NSString
NSLog(#"Converted String : %#",convertedString);
df.dateFormat = #"MM/dd/yyyy";
NSDateFormatter *formatter = [[[NSDateFormatter alloc] init] autorelease];
[formatter setDateFormat:#"MM/dd/yyyy"];
Just to see how it ends up:
NSDateFormatter* df = [[[NSDateFormatter alloc]init] autorelease];
df.dateFormat = #"MM/dd/yyyy";
NSString* dateString = [df stringFromDate:datePicker.date]; // Don't use leading caps on variables
NSLog(#"%#", dateString);
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"MM/dd/yyyy"];
The original accepted answer does a few things extra:
1) It allocates two NSDateFormatter instances which is not required. NSDateFormatter is expensive to create.
2) It is better to release date formatters explicitly when you are done with them rather than a deferred release using autorelease.
//get datepicker date (NSDate *)
NSDate *datePickerDate = [myDatePicker date];
//create a date formatter
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
//set its format as the required output format
[formatter setDateFormat:#"MM/dd/yyyy"];
//get the output date as string
NSString *outputDateString = [formatter stringFromDate:datePickerDate];
//release formatter
[formatter release];
- (void)showTime {
NSDate *now = [NSDate date];
NSDateFormatter *dateFormatter = [NSDateFormatter new];
[dateFormatter setDateFormat:#"HH:mm:ss"];
// you label
_time.text = [dateFormatter stringFromDate:now];
}
- (void)showDate {
NSDate *now = [NSDate date];
NSDateFormatter *dateFormatter = [NSDateFormatter new];
[dateFormatter setDateFormat:#"MM/dd/yyyy"];
// you label
_date.text = [dateFormatter stringFromDate:now];
}
- (void)viewDidLoad {
[super viewDidLoad];
self.showTime;
self.showDate;
}
Enjoy
NSString *str = #"2012-10-30"; /// here this is your date with format yyyy-MM-dd
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease]; // here we create NSDateFormatter object for change the Format of date..
[dateFormatter setDateFormat:#"yyyy-MM-dd"]; //// here set format of date which is in your output date (means above str with format)
NSDate *date = [dateFormatter dateFromString: str]; // here you can fetch date from string with define format
dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
[dateFormatter setDateFormat:#"dd/MM/yyyy"];// here set format which you want...
NSString *convertedString = [dateFormatter stringFromDate:date]; here convert date in NSString
NSLog(#"Converted String : %#",convertedString);
I use a code with options NSISO8601DateFormatWithDashSeparatorInDate:
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
NSString * stringformat = [NSDateFormatter dateFormatFromTemplate:#"MMddy" options:NSISO8601DateFormatWithDashSeparatorInDate locale:[NSLocale systemLocale]];
[dateFormatter setDateFormat:stringformat];
NSDate *d = [NSDate date]; // or set your date
NSLog(#"date in format %#", [dateFormatter stringFromDate:d]); // date in format 2018-06-20
Good day, I'm trying to convert NSString that I'm getting from the server to NSDate object.
That is the code:
NSString *date = #"Sep 12 at 12:03 am";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"MMM d 'at' H:m a"];
self.messageDateAndTime = [dateFormatter dateFromString:date];
NSLog(#"NSDate: %#", self.messageDateAndTime);
I'm getting date in the format that date string has. After I'm trying to create my own formatter for this date format. But anyway, I'm getting null! What I'm doing wrong?
I debug you above code its running fine and giving NSDate: 1970-09-11 18:33:00 +0000 this log. Check for you string first. For more you can use the category below.
// NSString+Date.h
#interface NSString (Date)
+ (NSDate*)stringDateFromString:(NSString*)string;
+ (NSString*)stringDateFromDate:(NSDate*)date;
#end
// NSString+Date.m
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];
[dateFormat setDateFormat:#"EEE, dd MMM yyyy HH:mm:ss ZZZ"];
NSDate *date = [dateFormatter dateFromString:stringDate ];
[dateFormatter release];
+ (NSDateFormatter*)stringDateFormatter
{
static NSDateFormatter* formatter = nil;
if (formatter == nil)
{
formatter = [NSDateFormatter alloc] init];
[formatter setDateFormat:#"EEE, dd MMM yyyy HH:mm:ss ZZZ"];
}
return formatter;
}
+ (NSDate*)stringDateFromString:(NSString*)string
{
return [[NSString stringDateFormatter] dateFromString:string];
}
+ (NSString*)stringDateFromDate:(NSDate*)date
{
return [[NSString stringDateFormatter] stringFromDate:date];
}
// Usage (#import "NSString+Date.h")
NSString* string = [NSString stringDateFromDate:[NSDate date]];
NSDate* date = [NSString stringDateFromString:string];
Please find the correct NSDateFormatter formatting string here.
I found the solution my self, it would return null until you set the locale yourself. This is the code:
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
NSLocale *usLocale = [[NSLocale alloc] initWithLocaleIdentifier:#"en_US"];
[dateFormatter setLocale:usLocale];
[dateFormatter setDateFormat:#"MMM d 'at' H:m a"];
self.messageDateAndTime =[dateFormatter dateFromString:messageDate];
i tried to convert this NSString date to NSDate
NSString *update_time= #"2012-03-09 14:54:30.0";
// convert to date
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"YYYY-MM-dd HH:mm:ss'.0'"];
[dateFormat setTimeZone:[NSTimeZone timeZoneWithName:#"Australia/Melbourne"]];
NSDate *dte = [dateFormat dateFromString:update_time ];
NSLog(#"Date: %#", dte);
but i'm getting Date: (null)
"GMT+4" is not a valid timzone name. Use timeZoneForSecondsFromGMT: instead:
//...
NSTimeZone *timeZone = [NSTimeZone timeZoneForSecondsFromGMT:4 * (60 * 60)];
[dateFormat setTimeZone:timeZone];
//...
If you want to use timeZoneWithName:, you can get a list of valid timezone names using [NSTimeZone knownTimeZoneNames]. Those all have the form "Europe/Berlin" etc.
NSString *update_time= #"2012-03-09 14:54:30.0";
Missing the pointer
You're missing a pointer.
NSString * update_time= #"2012-03-09 14:54:30.0";
// convert to date
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"YYYY-MM-dd HH:mm:ss'.0'"];
[dateFormat setTimeZone:[NSTimeZone timeZoneWithName:#"GMT+4"]];
NSDate *dte = [dateFormat dateFromString:update_time ];
NSLog(#"Date: %#", dte);
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.