loop Nsmutable arrray of uiimages from end to beginning

[chris Good]

I have an NSMUtable array of images where a different image is displayed with a previous and a next button, but when I get to the end of the array the simulator crashes. I want to loop the end of the array to the beginning so that when I get to the end of the array of images when I hit the next button again it loops back to the first image, also when Im at the first image if I hit the previous button it loops to the last image with no crashes

[phillipie99]

On the actions for the button presses, before you change the image check the index of the image you are about to set. If it is smaller than 0, set it to the highest index in the array (array.count), and if it is larger than highest index in the array (array.count) set the index to 0.

here is some psudo code

-(IBAction)NextImage
{
if (index > array.count)
index = 0;

...change image here
}

-(IBAction)LastImage
{
if (index < 0)
index = array.count;

...change image here
}