// you should add empty file "hiscores" in your xCode project

 - (void)save{

NSLog(@"saving...");

  NSDictionary *hiscores;

 

//adding object and keys;

//...

//...

 

NSString *writableFilePath = [self createEditableCopyOfFileIfNeeded:[NSString stringWithString:@"hiscores"]];

if (![hiscores writeToFile:writableFilePath atomically:YES]){

NSLog(@"WRITE ERROR");

} 

 }

 

- (void)load{

NSLog(@"loading...");

NSString *writableFilePath = [self createEditableCopyOfFileIfNeeded:[NSString stringWithString:@"hiscores"]];

hiscores = [NSDictionary arrayWithContentsOfFile:writableFilePath]; 

} 

 

 

 

 

- (NSString *)createEditableCopyOfFileIfNeeded:(NSString *)_filename {

    // First, test for existence.

    BOOL success;

    NSFileManager *fileManager = [NSFileManager defaultManager];

    NSError *error;

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

    NSString *documentsDirectory = [paths objectAtIndex:0];

    NSString *writableFilePath = [documentsDirectory stringByAppendingPathComponent: _filename ];

    success = [fileManager fileExistsAtPath:writableFilePath];

    if (success) return writableFilePath;

// The writable file does not exist, so copy the default to the appropriate location.

NSString *defaultFilePath = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent: _filename ];

    success = [fileManager copyItemAtPath:defaultFilePath toPath:writableFilePath error:&error];

    if (!success) {

NSLog([error localizedDescription]);

        NSAssert1(0, @"Failed to create writable file with message '%@'.", [error localizedDescription]);

    }

return writableFilePath;

}