Files not linking when building to device

[47primes]

Hello,

I am building my first app for the iPhone platform. The app stores read-only text in XML files which the user can search. The XML files are stored in subdirectories within the resources folder and are parsed using TouchXML. Everything works well in the simulator. However the XML files as well as a background image I add to a UIImageView for use as a background in some controllers cannot be found when I built the app on my iPhone device which causes the app to crash. It's running iOS 3.1.3.

Any help would be greatly appreciated.

[47primes]

Here's further information about the problem:

I am accessing the image for the UIImageView as such:

UIImage *backgroundImage = [UIImage imageNamed:@"parchment.jpg"];

I loaded the file parchment.jpg in my Resources folder in XCode.

To retrieve the xml files, I have some class methods that use NSHomeDirectory(). Each XML file is located in a subdirectory under the Resources folder in XCode:

+ (NSString *) directoryPathForVersion:(NSString *)version {
    return [[self applicationPath] stringByAppendingPathComponent:version];
}

+ (NSString *) applicationPath {
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSString *path = NSHomeDirectory();
    return [path stringByAppendingPathComponent:[[fileManager contentsOfDirectoryAtPath:path error:NULL] lastObject]];
}

So in another method, I try to build a path to an individual file:

NSString *directoryName = @"esv";
NSFileManager *fileManager = [NSFileManager defaultManager];
NSString *path = [self directoryPthForVersion];
if (![fileManager fileExistsAtPath:path]) {
    [NSException raise:InvalidBookException format:@"Invalid path %@", path];
}

This exception is never thrown in the simulator, but it's crashing the device on startup because I implement this logic in applicationDidFinishLaunching:

When I commented out this code in applicationDidFinishLaunching:, I get the error about not being able to access parchment.jpg. If I comment out both of these calls, the app builds on my device, but it of course doesn't work as I had intended.