As I move through an object, i need to increase 1 digit as I create a url

Sorry but I cant think of how to word the question. This is what I am trying to do. I have an xml file that contains

<Image1>pic1.jpg</Image1>
<Image2>pic2.jpg</Image2>
<Image3>pic3.jpg</Image3>
<ImageCount>3</ImageCount>

I am creating a url to show the pic. As I click "next" to view the next image I need to create the next url. I know it would be something like this but I cant wrap my head around it this morning.

if (onImageCount <= totalImageCount) {


        //here we are on the second image request. we need to create a string to pass the "nextimageurl". this string points to which "Image1,2,3," xml tag to pull up next


        nextImageURL = [NSStri开发者_JS百科ng stringWithFormat:@"http://www.pictureshostedhere.com/%@",selectedVehicle.Image[onImageCount]];
        imageData = [[NSData alloc] initWithContentsOfURL:[NSURL URLWithString:nextImageURL]];
        carImage = [[UIImageView alloc] initWithFrame:CGRectMake(46,8,228,171)];
        carImage.image = [UIImage imageWithData:imageData];
        [scrollView addSubview:carImage];
        //[self.view sendSubviewToBack:carImage];
        [carImage release];

Any help would be great!

---

Something like this perhaps...

onImageCount++;
if (onImageCount <= totalImageCount) {
        nextImageURL = [NSString stringWithFormat:@"http://www.pictureshostedhere.com/%@",[self nextImageFromXML:onImageCount]];
       // Other stuff...
}

then, somewhere in your code:

-(NSStrng*)nextImageFromXML:(NSUInteger)count
{
   // Somewhere you've already parsed the XML into an Array
   return [xmlArray objectAtIndex:count];
}

The shortcut would be just...

 nextImageURL = [NSString stringWithFormat:@"http://www.pictureshostedhere.com/%@",[xmlArray objectAtIndex:onImageCount]]; // Where xmlArray returns the appropriate string