https://stackoverflow.com/questions/22310753
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RussianWell KeychainItemWrapper is a old implementation full of bugs. I would recommend using another wrapper, or write your own.
That being said, I used to have many error but not this one. Basically what happens is while saving it checks that your item is already in the keychain, in order to add it or just update it. Here that check returns true even though the item is quite different, so it cannot update because SecItemUpdate believes it does not exist.
What you should do is reset your keychain, you have two options for this :
On the simulator Menu Simulator->Reset content and settings
Run this snippet somewhere in your code :
Based on Vegard answer here Reset An iPhone App's Keychain
-(void)resetKeychain {
[self deleteAllKeysForSecClass:kSecClassGenericPassword];
[self deleteAllKeysForSecClass:kSecClassInternetPassword];
[self deleteAllKeysForSecClass:kSecClassCertificate];
[self deleteAllKeysForSecClass:kSecClassKey];
[self deleteAllKeysForSecClass:kSecClassIdentity];
}
-(void)deleteAllKeysForSecClass:(CFTypeRef)secClass {
NSMutableDictionary* dict = [NSMutableDictionary dictionary];
[dict setObject:(__bridge id)secClass forKey:(__bridge id)kSecClass];
OSStatus result = SecItemDelete((__bridge CFDictionaryRef) dict);
NSAssert(result == noErr || result == errSecItemNotFound, @"Error deleting keychain data (%ld)", result);
}
