thnx so much silverkors.
i now don't have access to my idevice. as far as i could check from the class it draws a keyboard using rect and text. it is cool.
actually i am working on a simpler keyboard (just lower-key letters, no numbers).
my approch has been to load the iPhone keyboard pic as png. and for every key you hit it shows a somehow big rectangle of the letter above the key (something like when you hit a key in native iPhone keyboard). so it needs just three layers (keyboard, rectangle image, textlayer of the key you hit).
i will upload it when ready