Question

I am using below code.

NSString * weekdayString = [[self date] descriptionWithLocale:@"%A"];
NSLocale *usLocale = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US"];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setLocale:usLocale];
[dateFormatter setDateStyle:NSDateFormatterShortStyle];
dateString = [NSString stringWithFormat:@"%@,%@",weekdayString,[dateFormatter stringFromDate:[self date]]];
NSArray * components = [dateString componentsSeparatedByString:@","];
dateString = [NSString stringWithFormat:@"%@,%@",[components objectAtIndex:0],[components objectAtIndex:1]];

it’s working fine in simulator and ios 6.0 but it’s not showing as expected in ios 5.1 in device(iPad).

Answer 1

NSDate -descriptionWithLocale is documented to take an NSLocale; you’re passing an NSString and therefore relying on undocumented behaviour.

It’s also unclear what you’re trying to achieve with the splitting into components — presumably you’ve assumed that the NSDateFormatterShortStyle will always have a comma in it? That also isn’t guaranteed by the documentation.

What you probably want to do is just set a custom date format string. From the title of your post it looks like you probably want EEEE, MMMM dd. So e.g.

// see QA1480 re: en_US_POSIX
NSLocale *usLocale = [[NSLocale alloc] initWithLocaleIdentifier:@"en_US_POSIX"];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setLocale:usLocale];
[dateFormatter setDateFormat:@"EEEE, MMMM dd"];
dateString = [dateFormatter stringFromDate:[self date]];

QA1480 addresses an issue that can cause NSDateFormatter silently to adapt your date formatter internally.