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I want to get a quarter of the value in the NSDateComponents class

I want to get a quarter of the value from the specified date. (* date variable)

So. I made the following code and run. but the value of the quarter is zero.

Why is the value of the quarter equal to zero? where is the problem?

Consult an advanced person.

NSDateComponents *comp1 = [[NSDateComponents alloc] init];
[comp1 setYear:2012];
[comp1 setMonth:6];
[comp1 setDay:1];

NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];

NSDate *date = [gregorian dateFromComponents:comp1];  <== want to get a quarter value.

unsigned int unitFlags = NSYearCalendarUnit | NSQuarterCalendarUnit | NSMonthCalendarUnit | NSWeekOfYearCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;
NSDateComponents *comp2 = [gregorian components:unitFlags fromDate:date];

NSLog(@"year :       %5d",[comp2 year]);
NSLog(@"quarter :    %5d",[comp2 quarter]);
NSLog(@"month :      %5d",[comp2 month]);
NSLog(@"weekofYear : %5d",[comp2 weekOfYear]);
NSLog(@"day :        %5d",[comp2 day]);

Result:

2012-07-24 03:44:14.776 dateTest[1228:1307] year :        2012
2012-07-24 03:44:14.776 dateTest[1228:1307] quarter :        0
2012-07-24 03:44:14.777 dateTest[1228:1307] month :          6
2012-07-24 03:44:14.777 dateTest[1228:1307] weekofYear :    22
2012-07-24 03:44:14.778 dateTest[1228:1307] day :            1
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2 answers

It seems that the issue with NSQuarterCalendarUnit is being ignored (not verified, but saw an error message). Anyway, it's simple enough to get around ... Just use the NSDateFormatter class.

// After your NSDate *date, add...
NSDateFormatter *quarterOnly = [[NSDateFormatter alloc]init];
[quarterOnly setDateFormat:@"Q"];

int quarter = [[quarterOnly stringFromDate:date] intValue];

// Then change the quarter NSLog too
NSLog(@"quarter :    %5d", quarter);

Should work fine ...

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December 16, 2014

How about just:

([comp2 month] -1) / 3 + 1;

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