title: Values that I Put in Keychain Can Be Saved After app is updated?
body: <p>I have an application in app-store. In My Application I use keychain to save some values(for example: name &amp; surname) as crypted. If I use xCode to update my app , there is no problem about values. They are all saved in keychain as I want. But If I put new version into the app-store and updated my app with the version that is in appstore, My values are all gone :( Does iOS remove the values in keychain if app is updated ?</p>