My App is a JSON code which involves a date in string type. (Such as "2011-10-01").
I would like to know how I could conver it into NSDate?
It needs to be displayed in a different time format such as "1 October, 2011".
ex. this code doesn't work:
NSString *date1 = #"2010-11-12";
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"yyyy-MMMM-dd"];
NSDate *date2 = [dateFormat dateFromString:date1];
NSString *strdate = [dateFormat stringFromDate:date2];
As Tug writes in his blog post on the subject:
Objective-C and iOS SDK provide a class to help formatting date
(marshaling and unmarshaling), this class is NSDateFormatter. No
surprise, the NSDateFormatter uses the Unicode Date Format
Patterns.
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc]init];
[dateFormatter setDateFormat:#"yyyy-MM-dd"];
NSDate *date = [dateFormatter dateFromString:publicationDate ];
[dateFormatter release];
where publicationDate in this case is an NSString.
Use NSDateFormatter. The appropriate method is dateFromString:. Take a look at the documentation :)
You can try this
NSDateFormatter *df = [[[NSDateFormatter alloc] init] autorelease];
[df setDateFormat:#"dd MM yyyy"];
NSString *todayString = [df stringFromDate:[NSDate date]];
NSDate *someDate=[NSDate date];
NSString *targetDateString = [df stringFromDate:someDate];
NSLog(#"date:%#",targetDateString);
Related
I have an NSDateformatter that is not working correctly. I got my date as a string like this.
2013-02-20 00:00:00
And I need to return it as an NSDate like this
2013-02-20
What I've got at the moment is this.
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"yyyy-MM-dd hh:mm:ss"];
[dateFormat setDateFormat:#"yyyy-MM-dd"];
[dateFormat dateFromString:dateString]
But this is not working.
Any help ?
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"yyyy-MM-dd hh:mm:ss"];
NSDate* date=[dateFormat dateFromString: dateString];
[dateFormat setDateFormat:#"yyyy-MM-dd"];
NSLog(#"%#",[dateFormat stringFromDate: date]);
This will work
try it
if you have more than on date to parse, it could be worthy to create one input and one output date formatter
static NSDateFormatter *inputDateFormatter;
static NSDateFormatter *outputDateFormatter;
if (!inputDateFormatter) {
inputDateFormatter= [[NSDateFormatter alloc] init];
[inputDateFormatter setDateFormat:#"yyyy-MM-dd hh:mm:ss"];
outputDateFormatter = [[NSDateFormatter alloc] init];
[outputDateFormatter setDateFormat:#"yyyy-MM-dd"];
}
NSDate *date = [inputDateFormatter dateFromString:#"2013-02-20 00:00:00"];
NSString *string = [outputDateFormatter stringFromDate:date];
NSLog(#"%#", string);
result
2013-02-20
as NSDateFormatter are expensive to create, you should either store them in a singleton or declare them static to create them once for that method.
And I need to return it as an NSDate like this
A date has no format, it is just a point in time. you will have to creta a string with the desired format where needed.
I am trying to show time on graph and i have a full time stamp in this #"2012-08-28 18:50:24" format. when i try to get time from this date then it returns nil in NSDate.
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"HH:mm:ss"];
NSDate *time = [formatter dateFromString:#"2012-08-28 18:50:24"];
in this code only if I change [formatter setDateFormat:#"HH:mm:ss"]; line to [formatter setDateFormat:#"yyyy-MM-dd HH:mm:ss"]; then it starts working with full date and time. But i need only time
u have string . so you must have to convert it into date first as per your string format. after that you can convert date into any format. so follow this.
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
NSDate *time = [formatter dateFromString:#"2012-08-28 18:50:24"];
[formatter setDateFormat:#"HH:mm:ss"];
NSString *str = [formatter stringfromdate:time];
NSLog(#"%#",str);
NSDateFormatter is used to format your NSDate to your requirements.
Here you are fetching the date from a string so you have to tell the NSDateFormatter to look for the string with that format and convert it into date
NSDate contains both date and time so if you want the time only to show use dateformatter to get the time component from NSDate
iOS manages time and date together in NSDate.Actually they are supposed to work together.
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
// GET Proper NSDate
NSDate *time = [formatter dateFromString:#"2012-08-28 18:50:24"];
//To your requirement
[formatter setDateFormat:#"HH:mm:ss"];
NSString *timestr=[formatter stringFromDate:time];
NSLog(#"%#",timestr);
Because, first you need to convert your string into NSDate in the right formate that is
[formatter setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
NSDate *aDate = [formatter dateFromString:#"2012-08-28 18:50:24"];
Now you can reformate the NSDateFormatter according to your need. Now you can get time from the
[formatter setDateFormat:#"HH:mm:ss"];
NSString *newDate = [dateFormatter stringFromDate:aDate];
If you need to produce Date from String then you'll need to set the date format accordingly.
This is important that you create a NSDate object first! Only then you can separate time from whole date.
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"yyyy-MM-dd HH:mm:ss"];
NSDate *time = [formatter dateFromString:#"2012-08-28 18:50:24"];
then
[formatter setDateFormat:#"HH:mm:ss"];
NSString *timeStr = [formatter stringFromDate:time];
You can also use other string concatenation functions to remove the Date Modules like this.
However, if you have an NSDate first, then your previous code would work.
NSDate *date = [NSDate date];
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setDateFormat:#"HH:mm:ss"];
NSString *timeStr = [formatter stringFromDate:date];
NSDateFormatter *timeFormat = [[NSDateFormatter alloc] init];
[timeFormat setDateFormat:#"hh:mm:ss a"];
NSString *theTime = [timeFormat stringFromDate:[NSDate date]];
NSLog(#"time, %#",theTime);
First you have converted your string date and time in the date formate..
YourTimeStr = #"2012-08-28 18:50:24";
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
formatter.dateFormat = #"yyyy-mm-dd HH:mm:ss";
NSDate *DateAndTime = [formatter dateFromString:LogOutTimeSTR];
then
NSDateFormatter *dateFormatter1 = [[[NSDateFormatter alloc] init] autorelease];
[dateFormatter1 setDateFormat:#"HH:mm:ss"];
[dateFormatter1 setTimeZone:[NSTimeZone timeZoneWithName:#"UTC"]];
NSString *YourTimeStr =[dateFormatter1 stringFromDate:DateAndTime];
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 am trying to make a date format in such a manner hours.minutes day/month/year
I have uses this code :
NSDateFormatter *formatter =[[NSDateFormatter alloc] init];
NSDate *dateAndtime = [NSDate date];
[formatter setTimeStyle:NSDateFormatterShortStyle];
[formatter setDateStyle:NSDateFormatterShortStyle];
//[formatter setTimeStyle:NSDateFormatterShortStyle];
NSString* dateforBD=[[NSString alloc]init];
dateforBD =[formatter stringFromDate:dateAndtime];
But this code not give me my format.
Also i have tried this code:
NSLocale *locale = [NSLocale currentLocale];
NSDateFormatter *formatter = [[[NSDateFormatter alloc] init] autorelease];
NSString *dateFormat = [NSDateFormatter dateFormatFromTemplate:#"E MMM d yyyy"
options:0 locale:locale];
[formatter setDateFormat:dateFormat];
[formatter setLocale:locale];
It's also give me different format. How can i achieve the required format means 13.10 21/4/2011
All the formats return in month before date. May i have used wrong way for this ?
Thanks in advance.
NSDate *today = [NSDate date];
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"MM/dd/yyyy hh:mma"];
NSString *dateString = [dateFormat stringFromDate:today];
NSLog(#"date: %#", dateString);
[dateFormat release];
To explore more visit http://www.stepcase.com/blog/2008/12/02/format-string-for-the-iphone-nsdateformatter/
Hope it helps.
for date before month use -
[dateFormat setDateFormat:#"dd/MM/yyyy hh:mm"];
As specified in Apple's NSDateFormatter reference, the NSDateFormatter uses Unicode Date Format Patterns.
According to the unicode patterns, you would need the following pattern to achieve "13.10 21/4/2011":
hh:mm dd/MM/yyyy
So you would use this code:
NSDate *dateAndtime = [NSDate date];
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
[dateFormatter setDateFormat:#"hh:mm dd/MM/yyyy"];
NSString *newlyFormattedDateString = [dateFormatter stringFromDate:dateAndtime];
I have two strings:
date1 = 3-5-2014;
date2 = 4-2-2010;
I have to convert them in date and then compare them. I want the same format of date as in strings i.e., dd-mm-yyyy. How it can be done?
NSString *string=#"03-05-2014";
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc] init] autorelease];
[dateFormatter setDateFormat:#"dd-MM-yyyy"];
NSDate *dateFromString = [dateFormatter dateFromString:string];
enjoy...
You can extract NSDate objects from strings using the NSDateFormatter class. See the Date Formatters section Apple's Data Formatting Guide for a detailed explanation and sample code.
Try with below
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:#"MM/dd/yyyy h:mm a"];
NSDate *date = [dateFormat dateFromString:dateStr];
[dateFormat release];
here is the SO post
Convert NSString date to NSDate
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:#"dd-MM-yyyy"];
NSDate *date = [dateFormatter dateFromString:#"25-8-2010"];
NSLog(#"%#", date);
[dateFormatter release];
Hope this works for you
Cheers :)