NSString to NSDate conversion problem: always the same date!
Here is my class method for parsing a NSString to a NSDate object. Here is the code:
+ (NSDate *) stringToDate:(NSString *) string {
NSDateFormatter* dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]];
[dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss.AAA Z"];
NSDate *date = [dateFormatter dateFromString:string];
NSLog(@"stringToDate("%@") = '%@'", string, date);
[dateFormatter release];
return date;
}
and running it i get the following output:
stringToDate("2011-07-07 16:26:07.000 +0200") = '2011-07-06 22:00:00 +0000'
stringToDate("2011-07-07 16:26:17.000 +0200") = '2011-07-06 22:00:00 +0000'
... the same output! Can you help me?
If I get you right, your problem is that the two dates are not exactly the same.
If this is the problem, the line
[dateFormatter setTimeZone:[NSTimeZone timeZoneForSecondsFromGMT:0]];
is responsible for it. It is converting the given time object to GMT+00 time zone.
You should write:
NSLog(@"stringToDate("%@") = '%@'", string,
[dateFormatter stringFromDate:date]);
Otherwise, NSLog calls the description method of your date object. Here is what the documentation says about this method:
description
Returns a string representation of the receiver.
-(NSString *)description
Return Value
A string representation of the receiver in the international format YYYY-MM-DD HH:MM:SS ±HHMM, where ±HHMM represents the time zone offset in hours and minutes from GMT (for example, “2001-03-24 10:45:32 +0600”).
As you can see, the format is not exactly the same as the one you use.
edit
Try changing the dateFormat parameter of your dateFormatter to yyyy-MM-dd HH:mm:ss Z and use [dateFormatter stringFromDate:date] to display your date.
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