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

• Top: UILabel with opaque background and clear text
  • Clear text is rendered in drawRect: func through complicated masking process
• Middle: Worker View that is performing a repeating animation moving an image behind the top label
• Bottom: a UIView that you add the middle and top subview to in that order. Can be whatever color you want the text to be

An example can be seen here https://github.com/jhurray/AnimatedLabelExample