objective c - iOS App crashes when it's updated in the AppStore, but not when it's installed in Xcode -


i'm using coredata in app. when modify entity or attribute, upload appstore , try update it, crashes. have uninstall , download again. there way bypass , update automatically deletes outdated version , installs latest version? how can resolve in user friendly , efficient way?

you need create new core data model , migration.

please use tutorial: https://code.tutsplus.com/tutorials/core-data-from-scratch-migrations--cms-21844


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