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 Objective-C Basics (Retired) Foundation Framework NSDictionary

Posted by Jacob Boykin
Jacob Boykin
8,424 Points

What's wrong with my code? D:

Here's the challenge task: "Let's add the year of the album to the 'albumMutable' variable. Where the key is a NSString 'year' and the value is also a NSString '1969'."

Here's my code:

NSDictionary *album = @{ @"title":@"Abbey Road", @"artist":@"The Beatles" };
NSMutableDictionary *albumMutable = [NSMutableDictionary dictionaryWithDictionary:album];
[albumMutable setObject:@1969 forKey:@"year"];

The challenge error is: "Bummer! The year set is not the correct value."

I'm not sure what I've done wrong. I went ahead and copied and pasted my code into Xcode and iterated over the dictionary with an NSLog and the value and key of "year = 1969" is logged to the console.

1 Answer

Chris Shaw
Chris Shaw
26,676 Points
Chris Shaw
Chris Shaw
26,676 Points

Hi Jacob,

Looks like you're simply missing the double quotes from @1969, instead it should be @"1969".

Jacob Boykin
Jacob Boykin
8,424 Points

Ah, I see! I didn't read the instructions carefully enough. I see now that they did actually ask for 1969 to be a NSString object. Thank you!