I've been working on an app written in Swift, and I recently updated my iPhone to the iOS 9 beta. I then tried to test my app on the phone but Xcode 6 said that I couldn't because my version was not supported. So I went ahead and got the Xcode 7 beta. When I opened my project it asked me if I want it to convert my code to Swift 2 syntax. What should I do? There aren't that many changes it wants to make. Will my Swift 1 code still run in a Swift 2 compiler?
Swift 1 won't compile it. But I'd convert it over. I had an app I was going to release in August but now I guess it'll be released when iOS 9 is available!
You can keep running xcode 6 and publish your app. Then become a beta tester as test flight allows you to test it in iOS 9 now.
Word of caution: I'm struggling with upgrading my code. Lots of errors and syntactical changes. Its making me go mad ... on a code which perfectly worked well and was submitted to the AppStore.