CODEWITHSUNDEEP
iosobjective-cnsdate
Chandu
Chandu

Reputation: 695

Not able to get weekday from Date

I am getting a date from coredata and trying to get the weekday of that date.I tried the following code but its not working.

    NSDateFormatter *weekDayFormatter = [[NSDateFormatter alloc]init];
    [weekDayFormatter setDateFormat:@"EEEE"];
    NSDate *weekDay = [results valueForKey:@"date"];
    NSLog(@"%@",weekDay);//This log is working.
    NSString *weekDayString = [weekDayFormatter stringFromDate:weekDay];
    NSLog(@"%@",weekDayString); //This log is displaying null.
    NSLog(@"%@ is spent on %@",[results valueForKey:@"amount"],weekDayString);

It is working if i am using [NSDate date] instead of [results valueForKey:@"date"].

Upvotes: 0

Views: 184

Answers (6)

Rahul Gupta
Rahul Gupta

Reputation: 808

NSDate *today = [NSDate date];

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

NSDateComponents *todayComponents = [gregorian components:NSWeekdayCalendarUnit fromDate:today];

NSLog(@"weekday = %d",[todayComponents weekday]);

Upvotes: 0

Dipen Panchasara
Dipen Panchasara

Reputation: 13600

// Your date as a string
NSString *yourDate = @"02-09-2011 20:54:18";    //  [results valueForKey:@"date"]

// Prepare an NSDateFormatter to convert to and from the string representation
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];

// set format as your Date string (Eg. dd/MM/yyyy for 25/12/2012)
[dateFormatter setDateFormat:@"dd-MM-yyyy HH:mm:ss"];

// Parse the string representation of the date
NSDate *date = [dateFormatter dateFromString:yourDate];

NSDateFormatter* theDateFormatter = [[NSDateFormatter alloc] init];
[theDateFormatter setFormatterBehavior:NSDateFormatterBehavior10_4];
[theDateFormatter setDateFormat:@"EEEE"];
NSString *weekDay =  [theDateFormatter stringFromDate:date];
NSLog(@"%@",weekDay);

Upvotes: 0

Splendid
Splendid

Reputation: 1061

You have to use the same date format which you received from [results valueforKey:@"date"]. Thereafter you try to format the date as how you need.

NSDateFormatter *weekDayFormatter = [[NSDateFormatter alloc]init];
[weekDayFormatter setDateFormat:SAME FORMAT YOU RECEIVING];
NSDate *weekDay = [weekDayFormatter dateFromString:[results valueForKey@"date"]];   
NSLog(@"%@",weekDay);
[weekDayFormatter setDateFormat:@"EEEE"];
NSString *weekDayString = [weekDayFormatter stringFromDate:weekDay];

Upvotes: 0

Prasad G
Prasad G

Reputation: 6718

I think [results valueForKey:@"date"] gives NSString type object. Check it once. If it is true convert it to NSDate.

Case 1:

 NSDateFormatter *weekDayFormatter = [[NSDateFormatter alloc]init];
    [weekDayFormatter setDateFormat:@"EEEE"];
    NSDate *weekDay = @"2013-03-13 11:06:55 +0000";//here warning is there...
    NSLog(@"%@",weekDay);//This log is working.
    NSString *weekDayString = [weekDayFormatter stringFromDate:weekDay];
    NSLog(@"%@",weekDayString); //It gives NULL...

In this case, answer is null.

Case 2: 

NSDateFormatter *weekDayFormatter = [[NSDateFormatter alloc]init];
    [weekDayFormatter setDateFormat:@"EEEE"];
    NSDate *weekDay = [NSDate date];
    NSLog(@"%@",weekDay);//This log is working.
    NSString *weekDayString = [weekDayFormatter stringFromDate:weekDay];
    NSLog(@"%@",weekDayString); //It gives results...

In this case, answer is yourResult.

Upvotes: 0

arun.s
arun.s

Reputation: 1528

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

NSDateComponents *weekdayComponents =[gregorian components:NSWeekdayCalendarUnit fromDate:dateOfInterest];

NSInteger weekday = [weekdayComponents weekday];
// weekday 1 = Sunday for Gregorian calendar

[gregorian release];

Upvotes: 3

Cyrille
Cyrille

Reputation: 25144

Try using a NSCalendar to extract NSDateComponents from your NSDate.

Upvotes: 1

Related Questions