gistfile1.m

    NSString *resourcePath = [[NSBundle mainBundle] resourcePath];
    NSLog(@"documentsDirectory: %@", resourcePath);
    NSString *fontPath = [NSString stringWithFormat: @"%@/MinionPro-Regular.otf", resourcePath];
    NSURL *fontURL = [NSURL fileURLWithPath: fontPath isDirectory: NO];

    fontProvider = CGDataProviderCreateWithURL((CFURLRef) fontURL);
    NSLog(@"%@, fontProvider = %p", fontURL, fontProvider);
    
    mainFont = CGFontCreateWithDataProvider(fontProvider);