iOS hide Touch ID after view controller disappears

Question

I show Touch ID in my Passcode View Controller (it's presented as modal view controller) by context.evaluatePolicy(LAPolicy.deviceOwnerAuthenticationWithBiometrics, localizedReason: message

But sometimes I need to dismiss Passcode View Controller programatically before user enters his fingerprint. In this case alert with touch ID stays on its place. How can I dismiss this Touch ID alert too?

You want to dismiss the Passcode ViewController when TouchId alertVC is present, right? — Nirav D, Feb 16 '17 at 10:17
@NiravD, yes, and I want TouchID to disappear too after that — Paul T., Feb 16 '17 at 14:30

score 1 · Accepted Answer · answered Apr 21 '17 at 09:29

Declare

LAContext *myContext;
if ([myContext canEvaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics error:&authError]) {
    [myContext evaluatePolicy:LAPolicyDeviceOwnerAuthenticationWithBiometrics
              localizedReason:myLocalizedReasonString
                        reply:^(BOOL success, NSError *error) {
                            if (success) {
} else {
}];

add this line where do you want to dismiss touch id view

    [myContext invalidate];

I can't check right now, but I think that it should work, so I mark it as correct — Paul T., Apr 21 '17 at 10:15

iOS hide Touch ID after view controller disappears

1 Answers1