ios - UIDevice currentDevice identifierForVendor - can this change on an iPad -

my app uses uidevice currentdevice identifierforvendor me identify device. have encountered situation can't understand. uidevice currentdevice identifierforvendor of ipad of 1 of clients seems have changed. ever possible?

uidevice class reference :

the value changes when user deletes of vendor’s apps device , subsequently reinstalls 1 or more of them. value can change when installing test builds using xcode or when installing app on device using ad-hoc distribution. therefore, if app stores value of property anywhere, should gracefully handle situations identifier changes.

you can use keychain store unique uuid(create own method or use api). this may helpful you.