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iOS Objective-C Basics (Retired) Foundation Framework NSDictionary

Posted by Jorge Decuir
Jorge Decuir
2,307 Points

Guess Not Working.

Hi! i just tried two ways to initialize the dictionary, the alloc init way and the direct way, but none of them works! so what is te correct way to do that?

This is the first way i tried:

NSDictionary * album = [[NSDictionary alloc] initWithObjectsAndKeys:@"Abby Road",@"album",@"The Beatles",@"artist", nil];

And this is the other:

NSDictionary *album = @{@"album":@"Abbey Road", @"artist":@"The Beatles"};

But still sending me wrong, so i'm stuck.

2 Answers

James Carney
James Carney
16,255 Points
James Carney
James Carney
16,255 Points

What code challenge are you working on? Try this though...

NSDictionary *album = [[NSDictionary alloc] initWithObjectsAndKeys: @"Abby Road", @"album", @"The Beatles" , @"artist", nil];

Another way you could do it is like this:

- (instancetype)initWithObjects:(NSArray *)objects forKeys:(NSArray *)keys

"Initializes a newly allocated dictionary with entries constructed from the contents of the objects and keys arrays." description of the second example.

Jorge Decuir
Jorge Decuir
2,307 Points
Jorge Decuir
Jorge Decuir
2,307 Points

Hi thanks for the replay I did the challenge of NSDictionary but the way I solved it was with NSDictionary * albumMutable = [NSDictionary dictionaryWithDictionary: album]; thanks for the help!!!!