Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

iOS Objective-C Basics (Retired) Foundation Framework NSDictionary

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
26,650 Points

Hi Jacob,

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

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!