Modification date of a keychain item in iOS 4.x -

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in app, storing set of credentials in keychain offline access. when logs in while device offline, retrieve keychain item, check ksecattrmodificationdate, , compare value app has determine whether credentials have expired or not.

that , in ios 5.x. in ios 4.x ksecattrmodificationdate not exist in keychain item data dictionary.i checked doc , says available since ios 2.0. , if skip modification date check, item retrieved correctly keychain.

is aware of 4.x vs 5.x differences in area? searched apple dev forums , google , couldn't find useful.

found answer. ksecattrmodificationdate exists default ios 5+, not ios 4.x. has added manually.


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