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iOS

Posted by Nandu Menon
Nandu Menon
772 Points

Quiz in "iOS Development" series.

Assume you have images named 'Robot1.png','Robot2.png','Robot3.png','Robot4.png', create an array of UIImage objects called 'robotImages'.

My answer : NSArray * robotImages = [[NSArray:alloc] initWithObjects:[UIImage imageNamed:@"Robot1"],[UIImage imageNamed:@"Robot2"],[UIImage imageNamed:@"Robot3"], [UIImage imageNamed:@"Robot4"],nil];

Sorry, I am a newbie. Can someone explain, wahtI am doing wrong.

Thanks, Nandu

4 Answers

Nathan F.
Nathan F.
30,773 Points
Nathan F.
Nathan F.
30,773 Points

You're missing an important piece of information in your array.

Suppose you also had in your resources these items: 'Robot1.jpg', 'Robot2.jpg','Robot3.jpg','Robot4.jpg'

How would you tell these two sets of items apart? How would you tell the computer which set of resources you wanted?

Nandu Menon
Nandu Menon
772 Points
Nandu Menon
Nandu Menon
772 Points

Thanks Nathan for your reply! Appreciate it !

In the videos they seemed to have skipped the ".png" part of it. So I assumed the same :(

Anyway, I tried adding the .png suffixes as follows. But still I can't get past the quiz :-( :-(

New Answer (with ".png" added): NSArray * robotImages = [[NSArray:alloc] initWithObjects:[UIImage imageNamed:@"Robot1.png"],[UIImage imageNamed:@"Robot2.png"],[UIImage imageNamed:@"Robot3.png"], [UIImage imageNamed:@"Robot4.png"],nil];

It still tells me it i wrong :(

Amit Bijlani
STAFF
Amit Bijlani
Treehouse Guest Teacher
Amit Bijlani
Amit Bijlani
Treehouse Guest Teacher

Your answer is almost right but you have a misplaced colon [NSArray:alloc] it should be [NSArray alloc].

Nandu Menon
Nandu Menon
772 Points
Nandu Menon
Nandu Menon
772 Points

Hi Amit, Thanks ! Thats so silly of me ! Thanks for the videos. I enjoy learning from them. Would be nice if there is a more in depth version of Objective-C tutorials. Thanks !