CODEWITHSUNDEEP
iosobjective-cnsdatecomponentsformatter
iOS Developer
iOS Developer

Reputation: 321

How can I get the current day of the current year in integer in objective c ios

Hello dear I want to retrieve the number of day in the year e.g today is 10th April and I know its 10th day of the month but what if I want the number of the day of the year like today is 99th day of the year.

This is what I have done so far:

NSInteger todaydaysyear;

NSDateFormatter *yearlyDay = [[NSDateFormatter alloc] init];
[yearlyDay setDateFormat:@"dd-yyyy"];
NSDate *currentdateyear = [NSDate date];
NSString *cureentdatestryear = [yearlyDay stringFromDate:currentdateyear];
NSDate *startDateyear = [yearlyDay dateFromString:cureentdatestryear];

NSDateComponents *componentsyear = [[NSCalendar currentCalendar] components:NSCalendarUnitDay | NSCalendarUnitYear fromDate:startDateyear];
todaydaysyear = [componentsyear day];
NSLog(@"here is the day of the year e.g 99th day but not prints month day why%ld", (long)todaydaysyear);

Prints: 10 the current day of the month

What I want: 99th day of the year the current day of the ear count.

Ans: How do you calculate the day of the year for a specific date in Objective-C?

Upvotes: 0

Views: 795

Answers (2)

Sargis
Sargis

Reputation: 1334

Use this. 

//Assuming your calendar is initiated like this
NSCalendar *_calendar = [NSCalendar currentCalendar];

NSInteger yearlyDay;
//Fetch the weekOfYear number
NSInteger weekOfYear = [_calendar component:NSCalendarUnitWeekOfYear fromDate:[NSDate date]];
weekOfYear--;
//Fetch the weekDay number
NSInteger weekDay = [_calendar component:NSCalendarUnitWeekday fromDate:[NSDate date]];
yearlyDay = weekOfYear*7 + weekDay;
NSLog(@"%d", yearlyDay);

or this.

NSCalendar *gregorian =
    [[NSCalendar alloc] initWithCalendarIdentifier:NSCalendarIdentifierGregorian];
    NSUInteger dayOfYear =
    [gregorian ordinalityOfUnit:NSCalendarUnitDay
                         inUnit:NSCalendarUnitYear forDate:[NSDate date]];

    NSLog(@"%d", dayOfYear);

Upvotes: 0

mag_zbc
mag_zbc

Reputation: 6982

According to Unicode Technical Standard #35, the day of year is denoted by D (1..3 digits). Remember to use 3 digits, because year can have 365 days

[yearlyDay setDateFormat:@"DDD-yyyy"];

Output:

@"100-2018"

If you want to store it as integer, try 

NSDate *currentDate = [NSDate date];
NSDateFormatter *formatter = [NSDateFormatter new];
[formatter setDateFormat:@"DDD"];
NSString *string = [formatter stringFromDate:currentDate];
NSInteger dayOfYear = [string integerValue];

Upvotes: 1

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