problem with accessing NSMutableArray

Question

I have the following problem:

int index=6;
imageView.image=[imageArray objectAtIndex:index];
NSLog(@"%@",[imageArray objectAtIndex:index]);

If I run this code I get (null) as an output...even though I have nicely put the images inside the array using the following code:

NSURL *url = [NSURL URLWithString:@"somelink"];
NSData *data = [NSData dataWithContentsOfURL:url];
UIImage *image = [UIImage imageWithData:data];
[imageArray addObject:image];

I am pretty sure there are 20 images (I use an XML file and print the URL and image) and the image is fine, too. I print the values of image before putting inside the array and here's the value I get is :

<UIImage: 0x5368670>

Can anyone kindly help me out ? Thanks.

Aaron Yodaiken · Accepted Answer · 2011-06-05 04:11:23Z

1

Remember you'll need to make a new instance of the NSMutableArray... it's possible you're just calling methods on nil.

Before you start to you the imageArray, make sure you do something like:

imageArray = [NSMutableArray array]; 
// or      = [[NSMutableArray alloc] init]    if you want to "retain" it
//                                            for use in other methods

answered Jun 5, 2011 at 4:11

Aaron Yodaiken

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Comments

user149341 · Accepted Answer · 2011-06-05 04:00:57Z

0

Have you added at least seven such objects to the array, though? Remember that NSArray (and friends) count from zero, not one.

Also, are you certain that the object you're adding is not null (i.e, that dataWithContentsOfURL: and imageWithData: are both succeeding)?

answered Jun 5, 2011 at 4:00

user149341

1 Comment

Ahsan Over a year ago

I am sure. I am printing the value of image when I add them and a sample output is: <UIImage: 0x5368670>

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