NSDateFormatter not working to set setTimeZone

Question

I am trying to know the difference between two dates (Including days,hours,minutes and seconds). For that I am using below code, but It\'s not working.

+ (void)         


        

Answer 1

[NSDate date] is taking default timezone as GMT. so, I am unable to set my local timezone to date.

While knowing the difference between GMT OFFset to local , I am able to get the difference between two dates sucessfully.

NSDate* sourceDate = [NSDate date];
    NSTimeZone* sourceTimeZone = [NSTimeZone timeZoneWithAbbreviation:@"GMT"];
    NSTimeZone* destinationTimeZone = [NSTimeZone systemTimeZone];
    NSInteger sourceGMTOffset = [sourceTimeZone secondsFromGMTForDate:sourceDate];
    NSInteger destinationGMTOffset = [destinationTimeZone secondsFromGMTForDate:sourceDate];
    NSTimeInterval interval = destinationGMTOffset - sourceGMTOffset;
    NSDate* destinationDate = [[NSDate alloc] initWithTimeInterval:interval sinceDate:sourceDate];
    NSDateFormatter *outputFormatter = [[NSDateFormatter alloc] init];
    [outputFormatter setAMSymbol:@"AM"];
    [outputFormatter setPMSymbol:@"PM"];
    [outputFormatter setLocale:[NSLocale currentLocale]];
    [outputFormatter setDateFormat:@"MM/dd/yyyy hh:mm a"];

 NSDate *gameDate = [outputFormatter dateFromString:gameTime];
 NSDate* gameDestinationDate = [[NSDate alloc] initWithTimeInterval:interval sinceDate:gameDate];
//    NSLog(@"gameDate=%@",gameDate);
NSCalendar *gregorian = [[NSCalendar alloc]                 initWithCalendarIdentifier:NSGregorianCalendar];
NSUInteger unitFlags = NSMonthCalendarUnit | NSDayCalendarUnit|NSHourCalendarUnit|NSMinuteCalendarUnit|NSSecondCalendarUnit;
NSDateComponents *components = [gregorian components:unitFlags                           fromDate:destinationDate toDate:gameDestinationDate options:0];
NSInteger days = [components day];
NSInteger hours = [components hour];
NSInteger seconds = [components second];
NSInteger minutes = [components minute];

return ([NSString stringWithFormat:@"%01ddays:%02dhrs:%02dmins:%02dsec",abs(days),abs(hours), abs(minutes), abs(seconds)]);

Answer 2

Are you setting the timeZone for the output formatter and along with that are you adding the time difference to the output date?? Because, there is not need to add the time difference as setting timezone for both dateFormatters will automatically take care of the time difference between the time zones.