NSDateFormatter returning nil in OS 4.0
I had the following code working on on OS 3.x
NSString *stringDate = @"2010-06-21T20:06:36+00:00";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd'T'HH:mm:ssZ"];
NSDate *theDate = [dateFormatter dateFromString:stringDate];
NSLog(@"%@",[dateFormatter stringFromDate:theDate]);
but now in the newest xcode 3.2.3 under the iOS4 simulator, the varialble theDate is nil.
I have looked through the class reference and do not see anything deprecated or implemented differently for iOS4 with these specific methods. What did i leave out?
I found out it works if you do it this way (see below). The key is using the method: - [NSDateFormatter getObjectValue:forString:range:error:]
instead of
-[NSDateFormatter dateFromString]
The complete code:
+ (NSDate *)parseRFC3339Date:(NSString *)dateString
{
NSDateFormatter *rfc3339TimestampFormatterWithTimeZone = [[NSDateFormatter alloc] init];
[rfc3339TimestampFormatterWithTimeZone setLocale:[[[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"] autorelease]];
[rfc3339TimestampFormatterWithTimeZone setDateFormat:@"yyyy-MM-dd'T'HH:mm:ssZ"];
NSDate *theDate = nil;
NSError *error = nil;
if (![rfc3339TimestampFormatterWithTimeZone getObjectValue:&theDate forString:dateString range:nil error:&error]) {
NSLog(@"Date '%@' could not be parsed: %@", dateString, error);
}
[rfc3339TimestampFormatterWithTimeZone release];
return theDate;
}
Is your device set to 24 hour or 12 hour clock?
That sounds like an insane question but I've just run into that bug - the dateformatter will adjust your format string according to the current locale which will include the time format settings.
You can force it to ignore them by adding this line :
dateFormatter.locale = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"];
Hope that helps.
This code will remove the extra colon as AtomRiot describes:
Converting it from:
NSString *stringDate = @"2010-06-21T20:06:36+00:00"; to:
NSString *stringDate = @"2010-06-21T20:06:36+0000"; // Remove colon in timezone as iOS 4+ NSDateFormatter breaks
if (stringDate.length > 20) {
stringDate = [stringDate stringByReplacingOccurrencesOfString:@":"
withString:@""
options:0
range:NSMakeRange(20, stringDate.length-20)];
}
for more details see: https://devforums.apple.com/thread/45837
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