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iOS Objective-C Basics (Retired) Foundation Framework NSDictionary

Matteo Fontana
Matteo Fontana
7,211 Points

The year set is not the correct value

Hi, I don't understand what is the error, can you help me please?

Is an exercise, this is the istruction:"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 my work

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

I check the exercise but continue to give me an error and I don't now why.

Thank you so much Matteo Fontana

Chandler Tayek
Chandler Tayek
5,513 Points

Can you post what you wrote and what the error is?

1 Answer

You forgot to make the year a string literal. To fix it, just add quotes around 1969 like this:

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