LAContext UI on simulator

Question

Does anybody knows what is UI presented on Simulator when you call

self._authContext = LAContext()
if self._authContext.canEvaluatePolicy(.deviceOwnerAuthentication,
                                           error: &authError)
{
    self._authContext.evaluatePolicy(...
}

It asks for iPhone passcode, but in some unusual manner. Whatever you type in leads to success. Here is screenshot:

On device, if passcode is off you just don't pass canEvaluatePolicy

Is there a default UI to setup passcode if iPhone passcode is disabled?

Thanks!

@russbishop, yes, true, question is - what is that, how does it work and how it can be achieved on real device — alexey.metelkin, Mar 20 '18 at 20:36
I got this UI on simulator too, it only happens on simulator. Quite curious.. — nahung89, Mar 31 '18 at 04:34

nahung89 · Answer 1 · 2018-04-09T09:27:41.683

3

EDIT: I've not found any document from Apple yet, it's my assuming as described below.

It's fake UI for passcode authentication. On simulator, authContext.canEvaluatePolicy always response with true. Because of this, calling authContext.evaluatePolicy will open this UI above.

If you enable TouchID or FaceID on simulator, this UI will show up right after TouchID/FaceID fails in 3 times.

FYI: on simulator, you can use TouchID from Hardware > TouchID

edited Apr 09 '18 at 09:27

answered Mar 31 '18 at 09:35

nahung89

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Can be that. Although, it's still really arguable solution from Apple's side. Any documented descriptions? – alexey.metelkin Apr 08 '18 at 13:09
Yes it's still arguable. I dont find any document abt it. Updated the answer – nahung89 Apr 09 '18 at 09:25

score 0 · Answer 2 · answered Jul 06 '21 at 17:49

0

I'm not sure if this will help anyone.. but to trigger/test a success=false condition, you can press "enter" with an empty password string.

answered Jul 06 '21 at 17:49

Lytic

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LAContext UI on simulator

2 Answers2