NSDateFormatter documentation indicates that
-initWithDateFormat:allowNaturalLanguageString: is the recommended initializer
for new designs, and furthermore that -init is not "available" after 10.5.
However, I find kind of the opposite:
-initWithDateFormat:allowNaturalLanguageString gives unexpected results, but
-init works perfectly. I get the same results, building with either 10.6 or
10.7 SDK. I'm running in 10.7.
--- Code --------
NSLog(@"behavior = %ld", [NSDateFormatter defaultFormatterBehavior]) ;
NSString* formatString = @"yyyy.MM.dd 'at' HH:mm:ss.SSS zzz" ;
NSDateFormatter* oldFormatter ;
oldFormatter = [[NSDateFormatter alloc] init] ;
[oldFormatter setDateFormat:formatString] ;
NSDateFormatter* newFormatter ;
newFormatter = [[NSDateFormatter alloc] initWithDateFormat:formatString
allowNaturalLanguage:NO] ;
// This makes it worse:
// [newFormatter setFormatterBehavior:NSDateFormatterBehavior10_4] ;
NSDate* date = [NSDate date] ;
NSString* dateString ;
dateString = [oldFormatter stringFromDate:date] ;
NSLog(@"old: %@", dateString);
dateString = [newFormatter stringFromDate:date] ;
NSLog(@"new: %@", dateString);
[oldFormatter release] ;
[newFormatter release] ;
---- Result ----
behavior = 1040
old: 2011.11.11 at 17:20:59.493 PST
new: yyyy.MM.dd 'at' HH:mm:ss.SSS
----------------
Behavior 1040 is NSDateFormatterBehavior10_4, which is the newest behavior
available.
As you can see, the old method works as expected, but the new method
unexpectedly returns its format string. If I uncomment the line after "This
makes it worse", then instead of the format string I get an empty string.
What is going on, please?
Bonus question: How can -init be not "available"? Does this just mean that it
defaults to the super -[NSObject init] ?
Thanks,
Jerry Krinock
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