Don't create a separate Xib for iPhone 5. Instead, add a splash image named Default-568h@2x.png. That will identify your app as one that supports iPhone 5 metrics.
When the app is loaded - either on an iPhone 5 device - or on the sim with Retina 4-inch display, you will see your app running in full 568 pixel height mode.
You may see some empty spaces, or buttons in the wrong place, and so on. That's because you have not configured the autosizing properties correctly in Interface Builder. Be sure to do that, using the controls below to specify the "sticky-ness" of the the controls, and how they should expand into the additional space.
与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
