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Editorial Team
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Asked: 2026-05-20T16:48:54+00:00

This function works well, but it always returns the same value because I don’t

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This function works well, but it always returns the same value because I don’t know how to work with the objectatindex. And this: 

NSLog (@"Object at index %d is: %@", i, [appDelegate.animals objectAtIndex: i]);

Returns this:

2011-03-20 14:38:07.365 Tutorial[5063:207] Object at index 0 is: <Animals: 0x6151a20>
2011-03-20 14:38:07.367 Tutorial[5063:207] Object at index 1 is: <Animals: 0x6151ba0>
2011-03-20 14:38:07.368 Tutorial[5063:207] Object at index 2 is: <Animals: 0x6151d20>
2011-03-20 14:38:07.371 Tutorial[5063:207] Object at index 3 is: <Animals: 0x6151e90>
2011-03-20 14:38:07.374 Tutorial[5063:207] Object at index 4 is: <Animals: 0x6151ff0>
2011-03-20 14:38:07.375 Tutorial[5063:207] Object at index 5 is: <Animals: 0x6152180>

This is my full code: I actually have to combine the things in the for function.

int i = 0;
int count;

TutorialAppDelegate *appDelegate = (TutorialAppDelegate *)[[UIApplication sharedApplication] delegate];
Animals *aAnimal = (Animals *)[appDelegate.animals objectAtIndex:i];

count = [appDelegate.animals count];


for (i = 0; i < count; i++)
{
    // returns the right value, but always the same because no objectAtIndex
    NSLog(@"%@",aAnimal.animalName);


    NSLog (@"Object at index %d is: %@", 
           i, [appDelegate.animals objectAtIndex: i]);




}
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1 Answer

  1. Editorial Team

    Have you tried:

    for (i = 0; i < count; i++) {
    Animals* nextAnimal = (Animals*)[appDelegate.animals objectAtIndex: i];
    NSLog (@"Object at index %d is: %@", 
           i, nextAnimal.animalName);
}

    The reason you’re seeing stuff like:

    1-03-20 14:38:07.365 Tutorial[5063:207] Object at index 0 is: <Animals: 0x6151a20>
2011-03-20 14:38:07.367 Tutorial[5063:207] Object at index 1 is: <Animals: 0x6151ba0>
2011-03-20 14:38:07.368 Tutorial[5063:207] Object at index 2 is: <Animals: 0x6151d20>
2011-03-20 14:38:07.371 Tutorial[5063:207] Object at index 3 is: <Animals: 0x6151e90>
2011-03-20 14:38:07.374 Tutorial[5063:207] Object at index 4 is: <Animals: 0x6151ff0>
2011-03-20 14:38:07.375 Tutorial[5063:207] Object at index 5 is: <Animals: 0x6152180>

    …is because you’re logging the entire object, and not just the name. But you can see that a different object is indeed being returned each time by looking at the memory address of each one (the part that looks like 0x615....).

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