How do I implement an image array in Xcode?

Question

I'm trying to create an array of images for an imageView and then change those images when a button is pressed. I'm just testing the ability for the button to cause a method to get and display the image from the array. What am I doing wrong?

This is the code I have so far:

- (void)viewDidLoad {

    NSMutableArray *imagesArray = [[NSMutableArray alloc] initWithObjects:@"Image1.JPG", @"Image2.JPG", nil];
}


-(IBAction)img1 {

    [imageView setImage:[UIImage imageNamed:[imagesArray objectAtIndex:0]]];
}

I also get the warning 'unused variable 'imagesArray'

Thanks for helping!

'unused variable "imagesArray"'.. Think twice. You probably haven't used it yet... — Martol1ni
– Martol1ni, Commented Aug 29, 2012 at 17:30

Andrei G. · Accepted Answer · 2012-08-29 17:34:23Z

2

you are not retaining NSMutableArray *imagesArray, it goes out of scope as soon as viewDidLoad completes.

try this:

declare instance variable NSMutableArray *imagesArray;

and init using

imagesArray = [[NSMutableArray alloc] initWithObjects:@"Image1.JPG", @"Image2.JPG", nil];

answered Aug 29, 2012 at 17:34

Andrei G.

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Adam · Accepted Answer · 2012-08-29 17:34:07Z

0

I guess you declared your array twice. Change your load method to this and try again.

- (void)viewDidLoad {

    imagesArray = [[NSMutableArray alloc] initWithObjects:@"Image1.JPG", @"Image2.JPG", nil];

}

answered Aug 29, 2012 at 17:34

Adam

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