i create ContactPreviewView.xib but i can’t go to view like the last picture on page 49 there is no view 
well it working now just need to restart xcode and create and delete for a few time so it xcode’s bug i guess
@padupp If I’m not mistaken, a .xib file is just that, a .xib file. You need to manually attach your UIKit elements in it separately. Typically, a .xib file is used when you want to create a reusable view like a label, textField or a button. However, that is something you would do in addition to just creating a .xib file. I hope this makes sense.