CODEWITHSUNDEEP
iosbackupicloud
Morten Holmgaard
Morten Holmgaard

Reputation: 7806

Detect if iOS app restored from iCloud backup

Is there any way to detect if the launch is from a iCloud backup? (restored)

I have looked here but there is nothing about it.

Their rules about what is allowed to backup is very strict(rejected multiple times for it) backing a database up, with just one user-generated change in it - now I have to back the data up somewhere else and reinsert it on restore from backup.

Upvotes: 18

Views: 2973

Answers (2)

Runo Sahara
Runo Sahara

Reputation: 715

An approach would be to check if a file in the document dir with .isExcludedFromBackupKey is present/valid, and create that file if it's not there at startup.

Files in the document dir with that flag are removed when a backup is restored.

var resourceURL = documentFileURL
var resourceValues = URLResourceValues()
resourceValues.isExcludedFromBackup = excludedFromBackup
try resourceURL.setResourceValues(resourceValues)

Upvotes: 0

Ashton-W
Ashton-W

Reputation: 226

https://developer.apple.com/documentation/security/ksecattraccessiblealwaysthisdeviceonly

Keychain items can be marked as not to be backed up by using one of the accessible attribute with “ThisDeviceOnly”.

You could write a flag to NSUserDefaults and Keychain (Using kSecAttrAccessibleAlwaysThisDeviceOnly), whenever the keychain item is missing but the user defaults value is present (or a backed up keychain item) then it must have been restored from backup. Be aware of secure and not secure iTunes backups as a scenario too. Insecure backups shouldn’t have any keychain items.

Upvotes: 4

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