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  "title" : "TKSmartCardUserInteractionDelegate"
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# TKSmartCardUserInteractionDelegate

The interface implemented by a Smart Card user interaction delegate to handle user interaction events.

```
protocol TKSmartCardUserInteractionDelegate
```

## Topics

### Delegate Methods

[`characterEntered(in:)`](/documentation/CryptoTokenKit/TKSmartCardUserInteractionDelegate/characterEntered(in:))

Tells the delegate that a valid character has been entered.

[`correctionKeyPressed(in:)`](/documentation/CryptoTokenKit/TKSmartCardUserInteractionDelegate/correctionKeyPressed(in:))

Tells the delegate that a correction key has been pressed.

[`validationKeyPressed(in:)`](/documentation/CryptoTokenKit/TKSmartCardUserInteractionDelegate/validationKeyPressed(in:))

Tells the delegate that the validation key has been pressed, indicating the end of PIN entry.

[`invalidCharacterEntered(in:)`](/documentation/CryptoTokenKit/TKSmartCardUserInteractionDelegate/invalidCharacterEntered(in:))

Tells the delegate that an invalid character has been entered.

[`oldPINRequested(in:)`](/documentation/CryptoTokenKit/TKSmartCardUserInteractionDelegate/oldPINRequested(in:))

Tells the delegate that the old PIN needs to be entered.

[`newPINRequested(in:)`](/documentation/CryptoTokenKit/TKSmartCardUserInteractionDelegate/newPINRequested(in:))

Tells the delegate that the new PIN needs to be entered.

[`newPINConfirmationRequested(in:)`](/documentation/CryptoTokenKit/TKSmartCardUserInteractionDelegate/newPINConfirmationRequested(in:))

Tells the delegate that the new PIN needs to be re-entered for confirmation.


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