CODEWITHSUNDEEP
objective-cxcodemacoscocoansdate
Konrad Kolasa
Konrad Kolasa

Reputation: 621

List of days in Objective C

I wonder how could I make a list of days from MONDAY to SUNDAY...

I did it so:

- (NSString *) stringWithDayNameOf:(int)day {
    NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
    [dateFormat setDateFormat:@"D"];
    NSDate *date = [dateFormat dateFromString:[NSString stringWithFormat:@"%i", day]];
    [dateFormat setDateFormat:@"eeee"];
    NSString* outer = [dateFormat stringFromDate:date];
    outer = [outer uppercaseString];

    return outer;

}


 for (int i = 1; i <= 7; i++) {

        NSLog(@"DAY: %@", [self stringWithDayNameOf:i]);

    }

But it displays days from today... How to fix that or make simpler?

Thanks!!

Upvotes: 1

Views: 779

Answers (2)

jscs
jscs

Reputation: 64002

%D is the format specifier for "day of year", not "day of week". There's no specifier for numerical day of week, since (as far as I know) no-one writes dates that way.

You need to create your date using NSDateComponents and then format that:

NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:@"eeee"];
NSCalendar * cal = [NSCalendar currentCalendar];
NSUInteger numWeekdays = [cal maximumRangeOfUnit:NSWeekdayCalendarUnit].length;
NSDateComponents * comp = [[NSDateComponents alloc] init];
for( NSUInteger day = 1; day <= numWeekdays; day++ ){
    [comp setWeekday:day];
    [comp setWeek:0];
    NSDate * date = [cal dateFromComponents:comp];

    NSString * dayName = [dateFormat stringFromDate:date];

    NSLog(@"%@", dayName);
}

Also, NSDateFormatter knows the names of the days of the week already: -[NSDateFormatter weekdaySymbols]. The first day of the week in the Gregorian calendar is Sunday.

Upvotes: 2

CRD
CRD

Reputation: 53000

Use NSDateFormatter's weekdaySymbols and friends (for short names etc.)

Upvotes: 5

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