Dave: Would it be possible for you to present an improved approach, please? I use this solution frequently, and have not yet encountered any issues, but now you have me worried! What approach do you suggest?
Roger Dalal On Oct 12, 2011, at 9:49 PM, Dave DeLong wrote: > Be careful with this approach, since there are some weird edge cases where > that time may not exist on the proposed day (think DST boundaries). > > Dave > > Sent from my iPhone > > On Oct 12, 2011, at 6:46 PM, Roger Dalal <roger.da...@gmail.com> wrote: > >> Rick: >> >> The following code, which is likely what you are doing, will return the time >> in 1970 (NSDate's reference date) because you have not specified a date: >> >> NSString *timeString = @"14:50 PDT"; >> NSDateFormatter *df = [[NSDateFormatter alloc ] init]; >> [df setDateFormat:@"HH':'mm zzz"]; >> NSDate *date = [df dateFromString:timeString]; >> [df release]; >> >> >> Instead, you need to use date components to set the day as well as the time, >> per the following: >> >> NSString *timeString = @"14:50 PDT"; >> NSDateFormatter *df = [[NSDateFormatter alloc ] init]; >> [df setDateFormat:@"HH':'mm zzz"]; >> NSDate *date = [df dateFromString:timeString]; >> >> NSCalendar *calendar = [NSCalendar currentCalendar]; >> NSDateComponents *dateComponents = [calendar components:( NSYearCalendarUnit >> | NSMonthCalendarUnit | NSDayCalendarUnit ) fromDate:[NSDate date]]; >> NSDateComponents *timeComponents = [calendar components:( NSHourCalendarUnit >> | NSMinuteCalendarUnit | NSSecondCalendarUnit ) fromDate: date ]; >> >> [dateComponents setHour:[timeComponents hour]]; >> [dateComponents setMinute:[timeComponents minute]]; >> [dateComponents setSecond:[timeComponents second]]; >> >> NSDate *timeToday = [calendar dateFromComponents:dateComponents]; >> [df release]; >> >> Change 'fromDate' in NSDateComponents *dateComponents to whatever date you >> want in order to create your time on a different day. >> >> Best Wishes. >> >> Roger Dalal >> >> >> >> >> On Oct 12, 2011, at 9:30 PM, Rick Mann wrote: >> >>> I have a situation where I have to parse times like "14:50 PDT". If I just >>> set up an NSDateFormatter with dateFormat = @"HH:mm z", I end up with a >>> time of day in 1970. >>> >>> What's the best way to get it to give me that time of day today? >>> >>> Thanks, >>> Rick >>> >>> _______________________________________________ >>> >>> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) >>> >>> Please do not post admin requests or moderator comments to the list. >>> Contact the moderators at cocoa-dev-admins(at)lists.apple.com >>> >>> Help/Unsubscribe/Update your Subscription: >>> http://lists.apple.com/mailman/options/cocoa-dev/roger.dalal%40gmail.com >>> >>> This email sent to roger.da...@gmail.com >> >> _______________________________________________ >> >> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) >> >> Please do not post admin requests or moderator comments to the list. >> Contact the moderators at cocoa-dev-admins(at)lists.apple.com >> >> Help/Unsubscribe/Update your Subscription: >> http://lists.apple.com/mailman/options/cocoa-dev/davedelong%40me.com >> >> This email sent to davedel...@me.com _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
