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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
PLUS
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:

https://developer.apple.com/library/ios/documentation/Cocoa/Reference/Foundation/Classes/NSString_Class/Reference/NSString.html#//apple_ref/occ/instm/NSString/uppercaseString

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.