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iOS Objective-C Basics (Retired) Foundation Framework NSDictionary

David Ashworth
David Ashworth
718 Points
Posted by David Ashworth
David Ashworth
718 Points

Bug in NSDictionary challenge step 2

My code below which the challenge says is incorrect:

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

NSMutableDictionary *albumMutable = [[NSMutableDictionary alloc] initWithDictionary:album];

The error says I should be using the 'dictionaryWithDictionary' class method to initialize the new NSMutableDictionary... don't think that's right... can't continue now. :(

2 Answers

Stone Preston
Stone Preston
42,016 Points
Stone Preston
Stone Preston
42,016 Points

since the challenge error says you need to use the dictionaryWithDictionary class method to pass you should probably try

NSMutableDictionary *albumMutable = [NSMutableDictionary dictionaryWithDictionary:album];

while what you had first is correct as well, in this case the challenge wants you to use the dictionaryWithDictionary convenience constructor.

David Ashworth
David Ashworth
718 Points
David Ashworth
David Ashworth
718 Points

Righto--that works, thanks. I could have sworn they had used what I wrote in the code in the tutorial video, but going back now I see I'm mistaken. They did actually use dictionaryWithDictionary. Time for sleeping.