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iOS

Posted by Jean Philippeaux
Jean Philippeaux
4,259 Points

course "Build a Simple iPhone App" , step 5, "Animate this", Code Challenge # 1 : Image Based Animation

i'm totally blocked on the first question :

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

Here's my code :

UIImage *image = [UIImage imageNamed:@"robot.png"]; UIImageView *imageView = [[UIImageView alloc] initWithImage:image]; NSArray *robotImages = [NSArray alloc]; robotImages = [ initWithObjects: [UIImage imageNamed:@"Robot1"], [UIImage imageNamed:@"Robot2"], [UIImage imageNamed:@"Robot3"], [UIImage imageNamed:@"Robot4"], nil];

The compiler is saying that "Make sure you create an NSArray named 'robotImages' with instances of UIImage objects."

Any clue about what have i've made incorrectly ?

Brenden Konnagan
Brenden Konnagan
16,858 Points

You are very close...

To create the NSArray you are calling the alloc but adding a ; and missing a open bracket... try something like this: NSArray *robotImages = [[NSArray alloc] initWithObjects:@"Robot1.png", @"Robot2.png", @"Robot3.png", Robot4.png", nil];

1 Answer

Jean Philippeaux
Jean Philippeaux
4,259 Points

i've found the solution. Here's my code :

UIImage *image = [UIImage imageNamed:@"robot.png"]; UIImageView *imageView = [[UIImageView alloc] initWithImage:image];

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

everything worked fine !!