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iOS Objective-C Basics (Retired) Foundation Framework NSDictionary

Matteo Fontana
Matteo Fontana
7,211 Points
Posted by 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
Chandler Tayek
Chandler Tayek
5,513 Points

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

1 Answer

cmonk
cmonk
4,955 Points
cmonk
cmonk
4,955 Points

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"];