如何获取touch id认证信息？

Question

有没有什么方法可以获取某种 touch id 身份验证字符串？我想将其用作密码并将其与用户名相关联。

谢谢！

Answer 1

没有。没有办法做到这一点。 LAContext 类为您提供了几种状态（通过、失败、取消等），但您不会获得任何其他数据。以下是 LAError.h 文件中可能的状态值。

    /// Authentication was not successful, because user failed to provide valid credentials.
    LAErrorAuthenticationFailed = kLAErrorAuthenticationFailed,

    /// Authentication was canceled by user (e.g. tapped Cancel button).
    LAErrorUserCancel           = kLAErrorUserCancel,

    /// Authentication was canceled, because the user tapped the fallback button (Enter Password).
    LAErrorUserFallback         = kLAErrorUserFallback,

    /// Authentication was canceled by system (e.g. another application went to foreground).
    LAErrorSystemCancel         = kLAErrorSystemCancel,

    /// Authentication could not start, because passcode is not set on the device.
    LAErrorPasscodeNotSet       = kLAErrorPasscodeNotSet,

    /// Authentication could not start, because Touch ID is not available on the device.
    LAErrorTouchIDNotAvailable  = kLAErrorTouchIDNotAvailable,

    /// Authentication could not start, because Touch ID has no enrolled fingers.
    LAErrorTouchIDNotEnrolled   = kLAErrorTouchIDNotEnrolled,