问题
I have an iOS app which is currently live on AppStore. Now the app needs a major updation both design and functionality. The app is already developed using Xcode 7 and Objective C.
I would like to rebuild the project with Swift code. I am not using core data in app
Can I update the app as a new version of existing live app ?
回答1:
Yes you can. If you will keep same bundle identifier as is, there is no doubt it's possible, even if you will build it from the scratch, the itunesconnect will recognize it as the same app. I assume that you should update the version number -like any update should be done- and it should be fine; Regarding to changing the used programming language (from Objective-C to Swift), it would not make any issue.
来源：https://stackoverflow.com/questions/45086614/update-ios-app-from-objective-c-to-swift