Word Buzz to support Game Center

Today furryfishApps is proud to announce, that Word Buzz now supports Game Center. A lot of work went into making this happen and we learned quite a bit on the way. I won't go into technical detail here, but rather cover what we've implemented.

Word Buzz lets you share your highscore and achievements on Game Center. It comes with over 16 different themes (set of words) and a lot more available for download. Each of those themes gets its own score, which will be added to your overall highscore. The sum of all highscores is shared on Game Center.

Why didn't we just share the highscore of each theme? We couldn't! Game Center lets you only share up to 20 different highscores, which is probably reasonable. It might be a bit confusing to have 40 different highscore lists.

Word Buzz is available on all iOS devices. You can play on your iPhone as well as on your iPad or iPod touch. Unfortunately, there is no way with Game Center to sync more than 20 highscores between devices. That means, you cannot just pick up with your iPad, where you left off with your iPhone. We are working on a homegrown solution, but until that happens, it's best to stick on one device.

When playing Word Buzz, you can unlock over 10 different achievements. All of them are shared on Game Center automatically, as soon as you unlock them.

What happens if you are offline? Don't worry! Your achievements and highscores are safely stored on the device and uploaded to Game Center as soon as you sign in!

Go challenge your friends and enjoy Word Buzz with Game Center.

Game Center Presentation at Cocoa Heads Karlsruhe

On Wednesday, I'll be giving a presentation on Apple's Game Center at the local CocoaHeads Group, here in Karlsruhe.

Game Center is Apple's social gaming network, that lets you invite friends to play, share your highscore and achievements through leaderboards and it even auto-matches you with other players for online-multiplayer games.

If you are interested in Game Center, drop by RetroGames on Wednesday 24th of November at 19:00.

Universal App - Word Buzz goes iPhone/iPod touch

We have been working on bringing Word Buzz to iPhone and iPod touch for more than a month now. We started out with an iPad only version, because in the beginning we thought the concept of Word Buzz wouldn't work on a smaller device. After a none-stop coding weekend and a heavy testing session, we knew it would work and started hacking on iPhone and iPod touch support.

We decided to build a universal App, because of pervasive Game Center support and a unique selling point! The latter is a no brainer: you are willing to spend a couple more bugs, if you get an iPad version for free. The former is a technical limitation of Game Center. You can only hook up your leaderboards and achievements with one App Id.

Although it was easy enough to port Word Buzz to iPhone and iPod touch, we ran into a couple of pitfalls and one of them is worth sharing with you: the default device of your universal App! What does that mean? Well, if you want to have different xib files in your App for iPhone and iPad, you need to qualify them with a suffix -iPhone / -iPad. In your Info.plist, you configure your alternate main xib with NSMainNibFile~iphone / NSMainNibFile~ipad. Since we started out with an iPad App, we decided to make iPad the default, meaning my alternate main xib configuration in Info.plist was NSMainNibFile~iphone and point to MainWindow-iPhone.xib.

This works great for iPhone and iPads, but it doesn't work for iPod touches and it also doesn't work with iOS 3.x. Somehow iPod touches (even with iOS 4) and iPhones with iOS 3.x don't respect the NSMainNibFile~iphone configuration in Info.plist. They always use the NSMainNibFile config without any suffix.

We only found out about this after testing on an actual device, which shows how important testing on each and every device is. We decided to make iPhone / iPod touch devices the default and qualify every iPad resource with -iPad, just like Apple actually intended it to be done.

Word Buzz for iPad is available on the App Store, the iPhone / iPod touch version is coming in a couple of days as a free update. Let us know what you think about it in the comments or on Twitter.

Word Buzz getting a better Twitter integration!

If you follow our tweets, which you should, you might have seen that we have been working hard on a better Twitter integration for Word Buzz. When looking around on github, I found a lot of frameworks for Twitter and iOS, but only Stefan's was lightweight and easy enough to integrate it into Word Buzz.

Most of the frameworks are full blown Twitter engines, which is not what we need for Word Buzz. Our requirements are simple: share your achievements (maybe your highscore in the future) with your followers. In addition to that, Twitter is our support channel. We wanted to allow posting public messages to @WordBuzzApp from within the App. Sounds easy, right? No need to pull in a full fledged Twitter engine for that!

Stefan's provides an API, which is really easy to use and integrate. There are no 3rd party dependencies, no need to fiddle with your linker flags - just an API to use! It even comes with a reasonable UI in Twitter style colors. Unfortunately, there was no iPad UI, which we had to implement myself. However, it was easy enough to come up with a Xib for iPad. Stefan's API provides delegate protocols, which you can implement to handle events such as "authentication succeeded". This way it's easy to separate the Twitter logic from your own code. The UIViewControllers provided, handle the most basic tasks like checking if you entered enough information to process with authentication.

We are using xAuth for authentication, which Twitter has to enable for your App. It took a couple of days until they came around to let us in, but it was the best solutions. Stefan's API provides xAuth out of the box and it works seamlessly. We added a Keychain integration to save your credentials and a flag in Settings.app to reset them.

Overall, it took us about 1 days to natively integrate Twitter into Word Buzz - thanks to Stefan's API! If anybody is interested, we are happy to provide the iPad UI and the Keychain integration.