Let Several Apps Use the same Facebook App ID

If you want to let your user post something from your app onto Facebook, you need to register a Facebook app and call Facebook SDK to post messages. But if you have a free version and a paid version, you would like to share the same Facebook App ID.

Just follow Facebook tutorial to register Facebook App and config your apps. https://developers.facebook.com/docs/mobile/ios/build/

The only one thing I need to mention is you must leave 'iOS Bundle ID' empty.

From Facebook doc page:

iOS Bundle ID - (Optional) You may set this to match the bundle ID for your iOS app. If you add this setting then the bundle ID of your app will be checked before authorizing the user. The benefit of this setting for SSO is if the user has already authorized your app they will not be asked to authorize it when they access your app from a new device.

Xcode 4 and Git

I am new to Git. I used Perforce (P4) before, so I thought it is easy to use Git. Actually I was wrong. Git is not complex, but it has different concept.

In P4, we just check out and check in files. In Git, checking in has a new name Commit. When I committed my first change, I was surprised to see it does not appear in the server. Actually, Git did not really submit my code to the server. It was stored locally. I have to run this command in the command line:

git push origin master

So you must Push the local Commits to the server.

The problem is Xcode 4 can Pull, Commit, Compare, but does not provide Push functionality. How stupid the designer is. You can modify but cannot submit! Actually Pull, Commit and Compare are the only functionalities Xcode 4 provides. You cannot even revert!

Xcode 4 is free, but Apple should not make it suck.

Update on Nov 30, 2011:

SourceTree on Mac App Store is an excellent Git client. It is much better than GitX. And it is FREE!

Fixing the Problem of Cocos2D Game Disappearing in iPhone Simulator

I Created a new Cocos2D game. But it did not work well in iPhone simulator. It often disappeared in the simulator. I had to relaunch the simulator or relaunch Xcode. It was very boring. I didn't know why, because this project was still very simple.

I noticed there is a warning that Info.plist is included in the target. I did the following things:

1. Renamed Info.plist to ProjectName-Info.plist

2. Changed Info.plist to the same name in the target settings

3. Removed ProjectName-Info.plist from the target

The problem fixed!