Following this simple example http://iosdevelopertips.com/core-services/using-keychain-to-store-username-and-password.html

I see that you use kSecAttrAccount to set the username you want to store and kSecValueData to set the password. For my app I also want to store a four digit passcode similar to the passcode lock screen for iOS. I'm not having a lot of luck finding where I can store an additional value.

有帮助吗?

解决方案

One option is to create a 2nd KeychainItemWrapper instance with a different id. Use the kSecValueData value for your passcode.

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