IUI way to display invalid password

Question

I'm developing a mobile site using IUI.

It's a framework that makes web pages look like IPhone dialogs.

I have a tree-like catalog and on a certain level the page asks for a password to proceed.

I'm not quite used to IPhone and failed to find a native dialog with a password check that can fail.

What is the "IPhonic" way to handle an invalid password?

Should I display a modal window, an in-page warning in red or what?

Answer 1

A standard thing here is some kind of modal alert view.

IUI presumably implements this already (tho I can't find it from a quick search) but here is how it looks (skip to near the end of the video).

Basically a modal alert dialog but with some animation and a spotlight/shine effect. It is largely the animation that makes it feel 'iPhone'.

Answer 2

When buying stuff from the AppStore, if the password is invalid you get a modal dialog that states that your password is incorrect and whether you want to retry or cancel.