File Name NSString adds unnecessary in space

SOLVED (Thanks Regexident)

I have an app that passes the file path of a PDF to a custom -(id)init init method. It is added to the table and when it is selected, it calls the else statement for a non existent file:

- (void) gridView:(AQGridView *)gridView didSelectItemAtIndex:(NSUInteger)index {

NSLog (@"Selected theArgument=%d\n", index);

UIViewController *viewController = [[[UIViewController alloc]init]autorelease];
{
    //if file is built-in, read from the bundle
    if (index <= 3)
    {
        // first section is our build-in documents
        NSString *fileURLs = [_documentIconsURLs objectAtIndex:index];   
        NSLog(@"file url -%@", fileURLs);
        viewController = [[[xSheetMusicViewController alloc]initWithContentURL:fileURLs]autorelease];
    }
    //if file is external, read from URL
    else
    {
        // second section is the contents of the Documents folder
        NSString *fileURL = [_documentIconsURLs objectAtIndex:index];
        NSLog(@"file url -%@", fileURL);
        NSString *path;
        NSString *documentsDirectoryPath = [self applicationDocumentsDirectory];
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        path = [[paths objectAtIndex:0] stringByAppendingPathComponent:fileURL];


        if ([[NSFileManager defaultManager] fileExistsAtPath:documentsDirectoryPath])
        {
            viewController = [[[xSheetMusicViewController alloc]initWithDocumentURL:fileURL]autorelease];
        }
        else
        {
            UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Failure!"                                                            message:@"The Selected File Does Not Exist"
                                                           delegate:nil
                                                  cancelButtonTitle:@"OK"
                                                  otherButtonTitles: nil];
            [alert show];
            [alert release];        
            return;
        }
    }
[self.navigationController setNavigationBarHidden:YES animated:NO]; 
[UIView beginAnimations:@"animation" context:nil];
[UIView setAnimationDuration:1];
[UIView setAnimationTransition:UIViewAnimationTransitionCurlDown forView:self.navigationController.view cache:YES]; 
[self.navigationController pushViewController:viewController animated:NO];
[UIView commitAnimations];  
    }
}

So whenever I have a document with no space in it's name, it pushes and inits. But when the file name has a space in it, it says it does not exist. And when I remove the if-else method, it init's, but crashes because the file doesn't exist. I've tried to replace the %20 in the file path with a regular space, but the method continues to call the else part.

So, is the file path not standardized and readable, or is my else method wrong?

As your path appears to be a percentage escaped path string I'd try this:

[fileURL stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding]

And I'd rename fileURL to fileURLString to make clear that it's an NSString containing a URL path, not an actual NSURL (which your variable name would falsely imply).

But I'd check the code that populates _documentIconsURLs, as it's probabaly the origin of your problem.