Trouble with sprites (loading and removing)-cocos2d iphone - iphone

Question

Basically i have an array of Sprites to be loaded and removed one by one in an order.
I have a list of animal names in an array like
const NSString *Animal1[30] = {#"Lion .png",#"Zebra .png",...........
To load a sprite i use the following code
image[i]= [Sprite spriteWithFile: [NSString stringWithFormat:#"%#",Animal1[i]]];
image[i].position = ccp( 240,180 );
[self addChild: image[i]];
Then to remove the sprite after use I use the following code
[self removeChild:image[i] cleanup:YES];
What happens when i run the code in simulator is the sprite loads one after other till 20th animal. After the 20th animals the application crashes.
I dont know what is the problem.If i have the array less than 20 it works fine but when it exceed the application crashes.
Can anyone plz help to resolve the issue.

Answer 1

If it works for the first 20, it sounds like you may have a bad image or an erroneous filename for that 21st image. If you try to create a sprite from an unsupported or nonexistent image, then you'll get a crash.
Check and make sure all the filenames listed are actually inside your package (check case, too, since they're case sensitive!). Make sure the filenames match exactly - in the code sample you pasted above, it looks like there are spaces in the titles.
If the files are all there, make sure you didn't save one of them as a Photoshop document instead of as a .png or something. Even if the filename ends in .png, it doesn't mean that it was saved in that format.

Answer 2

From your description of the problem it could even be a bad index and you're just incrementing out of bounds or something. The best way to clear it up is to do some basic debugging.
place the last item in the middle of
the array. Does it still blow up on
the last one or on the same entry no
mater what position it's in?
remove the offending item to see if
the code works without it
trace thru the code and see the
entry point where it's blowing up,
check your stack trace, etc.

Answer 3

To verify all your files are ok try to load each one manually not using an array like(put a break point on each line and use Build & Debug):
(pseudo code)
add the lion sprite
add the tiger sprite
add the bear sprite
...etc...
If that works then test your array by not using a loop to load the sprites, load each one by calling it's index like(put a break point on each line and use Build & Debug):
(pseudo code)
add image[1]
add image[2]
add image[3]
...etc...
Then if that works fine I would setup your sprites into and array of sprites like:
(pseudo code)
create the sprite with image[i]
add the sprite to spriteArray
---repeat for each sprite---
Then do another loop to add the sprites to the layer like:
CGSize size = [[CCDirector sharedDirector] winSize];
for CCSprite *aSprite in SpriteArray {
aSprite.position = ccp((size.width - (aSprite.contentSize.width / 2)), (aSprite.contentSize.height / 2)); //positions the sprite to the lower right corner
[self addChild aSprite];
}
I like to put my sprites in an array, that way it's easier to just traverse the array when I need to work with them. Also, instead of using absolute coordinates, I like to use coordinates that are relative to the size of the window and the size of the sprite. By positioning them this way, it will convert the coordinates no matter what type of display or orientation or sprite size you are working with.
Hope this helps!