I am making sample application of state preservation & restoration. I have read & did an demo on ios 6. In ios 6 I can set restoration identifier on storyboard for perticular viewController in the identity inspector.
below image is of ios6

But in ios 5 there is no such facility is available. that means there is no restoration identifier field in identity inspector of viewController. Then Now how i can set Restoration identifier on storyboard in ios5
inbuilt state preservation & restoration is only available in ios6 . This facility is not available in ios5. thats why there is no any restoration identifier available on ios5.