Upgrading an Xcode Objective-C IOS game with Unity3d based project

Here is some code you can use to list the doc and app support contents. I guard this with the #define as I do not want this in the final app. I also use it to perform some cleanup (the commented out stuff) that you can use if you need to delete something.

#ifdef DEBUG
// Auxiliary function to list directory contents
+ (void) docList
{
    NSFileManager * fileManager = NSFileManager.defaultManager;
    NSURL         * docUrl      = [NSFileManager.defaultManager URLsForDirectory:NSDocumentDirectory inDomains:NSUserDomainMask].firstObject;
    NSString      * docPath     = docUrl.path;

    NSLog( @"User document directory" );
    NSLog( @"%@ listing follows", docPath );
    [fmUtil traverse:docPath tab:@"t" fileManager:fileManager];
}

// Auxiliary function to list application support path
+ (void) supList
{
    NSFileManager * fileManager = NSFileManager.defaultManager;
    NSURL         * docUrl      = [NSFileManager.defaultManager URLsForDirectory:NSApplicationSupportDirectory inDomains:NSUserDomainMask].firstObject;
    NSString      * docPath     = docUrl.path;

    NSLog( @"Application support directory" );
    NSLog( @"t%@", docPath );
    NSLog( @"tAppending bundle identifier" );
    docPath = [docPath stringByAppendingPathComponent:NSBundle.mainBundle.bundleIdentifier];
    NSLog( @"t%@", docPath );
    NSLog( @"%@ listing follows", docPath );

    [fmUtil traverse:docPath tab:@"t" fileManager:fileManager];
}

+ (void) traverse:(NSString *)root tab:(NSString *)tab fileManager:(NSFileManager *)fileManager
{
    NSArray * dir = [fileManager contentsOfDirectoryAtPath:root error:NULL];

    for ( NSString * s in dir )
    {
        // See if this is a directory or not
        NSString * t = [root stringByAppendingPathComponent:s];
        BOOL isDir = NO;

        [fileManager fileExistsAtPath:t isDirectory:& isDir];

        if ( isDir )
        {
            // Report
            NSLog(@"%@%@/",tab,s);

            // Traverse
            [fmUtil traverse:t tab:[tab stringByAppendingString:@"t"]
                    fileManager:fileManager];
        }
        else
        {
            // Get size of normal file
            NSDictionary       * fa = [fileManager attributesOfItemAtPath:t error:NULL];
            NSNumber           * fz = [fa objectForKey:NSFileSize];
            NSDate             * fm = [fa objectForKey:NSFileModificationDate];
            unsigned long long    n = fz.unsignedLongLongValue;

            // Some formatting
            NSString * f = s;

            while ( f.length < 50 )
            {
                f = [f stringByAppendingString:@" "];
            }

            NSLog(@"%@%@ %15llu bytes (%@)", tab, f, n, [fm descriptionWithLocale:NSLocale.currentLocale] );

            // To delete something for test purposes ...
            /*
            if ( [t.lastPathComponent isEqualToString:@"P5041-1-BuildingStatistics"] && [fileManager removeItemAtPath:t error:NULL] )
            {
                NSLog( @"%@%@ now xxxxxxxxxxxxxxxxxx", tab, f );
            }
            if ( [t.lastPathComponent isEqualToString:@"index"] && [fileManager removeItemAtPath:t error:NULL] )
            {
                NSLog( @"%@%@ now xxxxxxxxxxxxxxxxxx", tab, f );
            }
            */
        }
    }
}
#endif

Put this in your app delegate e.g. inside application:didFinishLaunchingWithOptions:.