iphone - How to set the position of the UIKeyboard -

I have a search bar that is at the bottom of the scene.

How can I set the status of UIKeyboard?

Use of CGAffineTransform at least I have assumed and tested that before OS version 4.0 Need to define OS 4.0 and greater OS Transformation, the keyboard is taking care of the situation, so, I'm checking for the system before setting the transform.

  if ([[UID vs current device] system war] float value] 4.0) {CGAffineTransform translate = CGAffineTransformMakeTranslation (xx.0, yy .0); // use x, y value [self set transformsform: translation]; }