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

Posted by Sayana Narayanan
Sayana Narayanan
1,221 Points

arrays

NSArray *booksArray = [NSArray arrayWithObjects : @"Hamlet",@"King Lear",@"Othello",@"Macbeth",nil];

have this array now second questin is : Create a string variable called 'bookTitle' and assign it the third item from the 'booksArray'.

my answer was

NSString *bookTitle = [self.booksArray objectAtIndex:2];

but it showing error can you help me to fix it.

3 Answers

Kevin Lozandier
Kevin Lozandier
Courses Plus Student 53,747 Points

Hi, Sayana Narayanan:

You do not need to associate self with booksArray because of the scoping context of this challenge.

Correcting that mistake, you should have the following code typed:

NSString *bookTitle = [booksArray objectAtIndex:2];

Pro tip

Even better, though it might not be recognized by the challenge for this problem, you can access the index you want of an array using square brackets like most languages.

You can also simplify NSArray instantiations with the literal syntax: 

NSArray *booksArray = @[@"Hamlet",@"King Lear",@"Othello",@"Macbeth"]; 
NSString *bookTitle = booksArray[2];
Sayana Narayanan
Sayana Narayanan
1,221 Points

Thanks

Dino Paškvan
PLUS
Dino Paškvan
Courses Plus Student 44,108 Points
Dino Paškvan
Dino Paškvan
Courses Plus Student 44,108 Points

booksArray in this situation is not a class property, so you don't need the self part to access it.

AbdelGhafour Mohie
AbdelGhafour Mohie
1,876 Points
AbdelGhafour Mohie
AbdelGhafour Mohie
1,876 Points

Try removing "self".