convert date string to NSDate in objective c/iOS - iphone

Question

I have this string ----> Sun, 16 Dec 2012 15:30:22 +0000
I want to convert it to NSDate. I have tried the below code but it is giving me null
NSDateFormatter *df = [[NSDateFormatter alloc] init];
[df setDateFormat:#"yyyy-MM-dd hh:mm:ss a"];
NSDate *date = [[NSDate alloc] init];
date = [df dateFromString: #"Sun, 16 Dec 2012 15:30:22 +0000"];
NSLog(#"date: %#", date);
I am not getting the issue ?
Any guidance plz

Answer 1

The dateFormat of the formatter needs to match the format of the string you are providing it with.
Therefore something like this should work
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
formatter.dateFormat = #"EEE, dd MMM yyyy HH:mm:ss ZZZ";
NSLog(#"%#", [formatter dateFromString:#"Fri, 18 Jan 2013 15:30:22 +0000"]);
To look up what the specifiers actually mean check Unicode Technical Standard #35

Answer 2

Try this code
NSDateFormatter *df = [[NSDateFormatter alloc] init];
[df setDateFormat:#"EEEE, dd MMM yyyy"];
NSDate *date = [[NSDate alloc] init];
date = [df dateFromString: #"Sun, 16 Dec 2012"];
NSLog(#"date: %#", date);
Hope it helps you..
EDIT :-
For your string
NSDateFormatter *df = [[NSDateFormatter alloc] init];
[df setDateFormat:#"EEEE, dd MMM yyyy HH:mm:ss z"];
NSDate *date = [[NSDate alloc] init];
date = [df dateFromString: #"Sun, 16 Dec 2012 15:30:22 +0000"];
NSLog(#"date: %#", date);

Answer 3

Try this to get NSDate from String
- (NSDate*) dateFromString:(NSString*)aStr
{
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setLocale:[[[NSLocale alloc] initWithLocaleIdentifier:#"en_US_POSIX"] autorelease]];
//[dateFormatter setDateFormat:#"YYYY-MM-dd HH:mm:ss a"];
[dateFormatter setDateFormat:#"EEE, dd MMM yyyy HH:mm:ss ZZZ"];
[dateFormatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]];
NSLog(#"%#", aStr);
NSDate *aDate = [dateFormatter dateFromString:aStr];
[dateFormatter release];
return aDate;
}
It works fine for me.