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 Build a Blog Reader iPhone App Exploring the Master-Detail Template Modifying the Master-Detail Template

Rodrigo Chousal
Rodrigo Chousal
16,009 Points

Now make the 'bookTitle' upper case

NSArray *booksArray = @[@"King Lear", @"Hamlet", @"Othello", @"Macbeth"]; NSString *bookTitle = booksArray[2];

2 Answers

Adam Rais
Adam Rais
Courses Plus Student 3,685 Points
NSString *bookTitle = [booksArray[2] uppercaseString];
Gareth Borcherds
Gareth Borcherds
9,372 Points

Adam is correct. To explain it a little further, if you look at what you are doing, you are creating a NSString called bookTitle and assigning it a string from the array booksArray. Now because you are creating an NSString, you have access to the class methods of NSString, which if we look at the documentation:


we see that there is a method to change the string to upper case. We call that method on our string returned from our array and make it all uppercase.