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    <p>I cannot possibly imagine how yielding the string <code>image5image4image3image2image1.jpg</code> in <code>string3</code> in your "answer" to your own question could be construed as useful or a solution (I pasted your code into an Xcode Foundation tool project w/NUMIMAGES set to 5).</p> <p><em>It seems that Objective C jumps thru hoops to make seemingly simple tasks extremely difficult.</em></p> <p>Read <a href="http://developer.apple.com/mac/library/documentation/cocoa/conceptual/ObjectiveC/Introduction/introObjectiveC.html" rel="noreferrer">the Objective-C Guide</a> and <a href="http://developer.apple.com/mac/library/documentation/cocoa/Conceptual/Strings/introStrings.html#//apple_ref/doc/uid/10000035i" rel="noreferrer">the String Programming Guide</a>, then make draw your conclusions. Criticizing something you don't understand is generally counter-productive (we've all done it, though -- easy to do when frustrated).</p> <p><em>I simply need to create a sequence of strings, image1.jpg, image2.jpg, etc etc</em></p> <h2>Naive solution:</h2> <pre><code>#define NUMIMAGES 5 NSMutableArray *fileNames = [NSMutableArray array]; for(int i = 0; i&lt;5; i++) [fileNames addObject: [NSString stringWithFormat: @"image%d.jpg", i]]; NSLog(@"fileNames %@", fileNames); </code></pre> <p>Outputs:</p> <pre><code>fileNames ( "image0.jpg", "image1.jpg", "image2.jpg", "image3.jpg", "image4.jpg" ) </code></pre> <p>Note that there isn't anything particularly wrong with the naive solution. It is just more fragile, less efficient, and more code than is necessary.</p> <h2>One Possible Better Solution</h2> <ol> <li><p>Add all images into your application project as resources.</p></li> <li><p>Use the NSBundle API to grab URLs to all images at once.</p></li> </ol> <p>I.e.:</p> <pre><code>NSArray *paths = [[NSBundle mainBundle] pathsForResourcesOfType: @"jpg" inDirectory: nil]; </code></pre> <p>Not only does this remove hardcoding of image names from your code, it also allows the system to optimize directory enumeration and path generation. If you want to load only a subset of images -- say you are writing a game and have a series of images related to monsters -- then put all the related images in a single directory, add the directory to your Resources, then pass that directory's name as the second argument to the above method.</p> <p>All of this -- and much more -- is documented in the <a href="http://developer.apple.com/iphone/library/documentation/cocoa/Conceptual/LoadingResources/Introduction/Introduction.html#//apple_ref/doc/uid/10000051i" rel="noreferrer">resource programming guide</a>.</p>
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    1. COThanks. Will have yo look it up since I'm still unclear how I would then access individual images in the paths array created.
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    2. CONSArray documentation is quite clear and even has a companion programming guide: http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/Collections/Collections.html#//apple_ref/doc/uid/10000034i
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