Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community!

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial


Boon Kiat Seah
Boon Kiat Seah
66,664 Points

Having trouble with Adapting Data for Display Extra Credit Exercise

Here is my code, please tell me what is the best way to attempt this extra credit exercise. I edit the the method in the BlogPost class to return NSString that will show the age of the blogPost. However, i couldn't get it correctly. Here is what i have done so far. Thanks

- (NSString *) formattedDate {
  NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];

  [dateFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"];

  NSDate *tempDate = [dateFormatter dateFromString:self.date];

  NSDate* now = [NSDate date];

  NSDateComponents* ageComponents = [[NSCalendar currentCalendar]

  return [NSString stringWithFormat:@"%ld",(long)[ageComponents month]];

1 Answer

Amit Bijlani
Amit Bijlani
Treehouse Guest Teacher

The class NSDate has a method called timeIntervalSinceNow which compares the current date and the date in the object. The number returned to you is represented in the number of seconds. So if the blog post was written yesterday then it might return 86,400 seconds or 24 hours represented as number of seconds or 24 * 60 * 60.

The basic math is that if 1 day = 86,400 seconds then you can simply divide that number to get the number of days 86,400/86,400 = 1 day. If the resulting number is more than 7 then you can return a string saying "a week ago" or if the number is more than 30 then you can return a string saying "a month ago".

To see a more complete version of this implementation check out this GitHub project: https://github.com/kevinlawler/NSDate-TimeAgo You can even use it in your own project.