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)]);