i want to know what things need to be do in developing the upgrade version of an application (like bundle version) so that if a user download my upgrade version of my application then it update the old version.
i have develop the upgrade version of my app in old version and just changed its version no. I need that data of my old app remains there.
All data in the document directory will not be touch when upgrading. All files in the bundle will be copies from the new version.