Question

keychainWrapper provides the mechanism for storing a NSString (like passwords).

Can I also store NSArray or NSDictionary in keychainWrapper?

Answer 1

You can use NSKeyedArchiver and NSKeyedUnarchiver, and if you have custom objects stored in the array of dictionary, make sure that class implements the NSCoding protocol.

NSData * encodedData = [NSKeyedArchiver archivedDataWithRootObject:array];

You can then convert NSData to NSString using base64 encoding http://www.cocoawithlove.com/2009/06/base64-encoding-options-on-mac-and.html

for unarchiving it’s just going backwards,use get NSData from the base64 NSString and use the unarchiver

NSArray *array = [NSKeyedUnarchiver unarchiveObjectWithData:data];