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! While you're at it, check out some resources Treehouse students have shared here.

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

iOS Build a Weather App with Swift (Retired) Data Modeling With Structures Customizing Dates

Devin Scheu
Devin Scheu
66,191 Points

Help With Swift

Question: Let's assume we have a date object called dateOfBirth. Create a constant named dateFormatter and assign an NSDateFormatter instance to it.


import Foundation
let secondsSinceBirth = NSTimeInterval(1200000000)
var dateOfBirth = NSDate(timeIntervalSince1970: secondsSinceBirth)
let dateFormatter = dateFormatter(dateOfBirth) as NSDateFormatter

1 Answer

Stone Preston
Stone Preston
42,016 Points

you incorrectly initialized the NSDateFormatter constant you used

let dateFormatter = dateFormatter(dateOfBirth) as NSDateFormatter

you called the initializer incorrectly. initializers use the same name as the class (NSDateFormatter) and the NSDateFormatter initializer takes no arguments. the cast is also unnecessary

you can initialize an NSDateFormatter by calling its initializer that takes 0 arguments:

let dateFormatter = NSDateFormatter()