Need Transitioning Help from iOS SDK 4 to 5

can you still build applications you made from SDK 4 to an updated iOS 5 device? 开发者_开发技巧without having to update to the beta version of XCode (4.2)?

Or maybe, Will it be okay also if I will just have two versions of XCode?

Thanks

You need to update to Xcode 4.2 to get the latest version of the iOS SDK. I'm not sure if you can use the iOS 5 SDK with Xcode 4.1; maybe if you update your compiler to clang 3.0.

Of course, you can always run iOS 4 apps on iOS 5 devices.