I already make the app for ios 6 using xib. All the views are shown perfectly same as xib.
But in IOS 7, due to the status Bar the views are moves to up & there is a bla
Move your views so they appear correctly for iOS7 and use the iOS6/7 Deltas setting in interface builder to add the correct amount of delta height so your view appears correctly in iOS6.
Also see: https://stackoverflow.com/a/19025547/1545180