iPhone “slide to unlock” animation

Question

Any ideas as to how Apple implemented the \"slide to unlock\" (also, \"slide to power off\" is another identical example) animation?

I thought about some sort of ani

Answer 1

Maybe it's just a rendered-out animation - you know, a series of stills played one after another. Not necessarily a dynamic effect.

Update: Never mind, the video DrJokepu posted proved it's dynamically generated.