gistfile1.m

NSFileManager *fileManager = [NSFileManager defaultManager];
        NSError *error;
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *documentsDirectory = [paths objectAtIndex:0];
        NSString *documentDBFolderPath = [documentsDirectory stringByAppendingPathComponent:@"templates"];
        NSString *resourceDBFolderPath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"templates"];
        
        if (![fileManager fileExistsAtPath:documentDBFolderPath]) {
            //Create Directory!
            [fileManager createDirectoryAtPath:documentDBFolderPath withIntermediateDirectories:NO attributes:nil error:&error];
        } else {
        }
        
        NSArray *fileList = [fileManager contentsOfDirectoryAtPath:resourceDBFolderPath error:&error];
        for (NSString *s in fileList) {
            NSString *newFilePath = [documentDBFolderPath stringByAppendingPathComponent:s];
            NSString *oldFilePath = [resourceDBFolderPath stringByAppendingPathComponent:s];
            if (![fileManager fileExistsAtPath:newFilePath]) {
                //File does not exist, copy it
                [fileManager copyItemAtPath:oldFilePath toPath:newFilePath error:&error];
                if([s isEqualToString:@"catalog.yml"]){
                    NSFileManager *fileManager = [NSFileManager defaultManager];
                    NSData *data = [fileManager contentsAtPath:[NSString stringWithFormat:@"%@/catalog.yml",documentDBFolderPath]];
                    NSError *err;
                    id yaml = [YAMLSerialization YAMLWithData:data options:kYAMLReadOptionStringScalars error:&err];
                    NSString *filePath = [documentDBFolderPath
                                          stringByAppendingPathComponent:@"catalog.plist"];
                    [yaml writeToFile:filePath atomically:YES];
                }
            } else {
            }
        }