Hello
I have a app created using Swift 1.2, when the Swift 2 is released my app can be updated to Swift 2? I will need to change something in my code?
I'm not sure you understand.
There are no tools you can use to build using Swift 2 for the store at this time.
If you want to test your app to get ready for Xcode 7 (w/Swift 2), OS 9 as examples, using beta tools, you should work with a copy of your working/shipping project and let the Swift 1.2 ~ 2.0 migrator tool take a pass at it. Expect further updates to the beta tools later when they are able to be used for the store.
Your app in the store now won't quit working just because Swift is updated.