IOS Couldn & amp; #39; t update the Keychain Item

Source: Internet
Author: User

IOS Couldn & #39; t update the Keychain Item

Generally, it is safer to store accounts and passwords using Keychain, which is roughly as follows:

KeychainItemWrapper * keychain = [[KeychainItemWrapper alloc] initWithIdentifier: @ "MyLogin" accessGroup: nil]; [keychain setObject: self. phoneText. text forKey :( _ bridge id) (kSecAttrAccount)]; [keychain setObject: self. keyText. text forKey :( _ bridge id) (kSecValueData)];

But occasionally, a problem occurs, that is, the Couldn doesn't update the Keychain Item, and then the application will crash.

I checked it and added a line of code. It seems that the problem has been solved and whether it will continue to appear later. The principle is not very clear.

KeychainItemWrapper * keychain = [[KeychainItemWrapper alloc] initWithIdentifier: @ "MyLogin" accessGroup: nil]; [keychain setObject: self. phoneText. text forKey :( _ bridge id) (kSecAttrAccount)]; [keychain setObject: self. keyText. text forKey :( _ bridge id) (kSecValueData)]; [keychain setObject: @ "AppString" forKey: (_ bridge id) kSecAttrService];
I feel that I have added an identifier to the app. I hope you can explain it to me.

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