Xcode 4.5 + UIScrollView: Cannot see struts and springs (OSX 10.8 Mountain Lion)
In Xcode 4.5, for iOS 6 and OSX 10.8 development, AutoLayout is being enabled by default.
To turn it off, open your xib file and click on a blank spot (not on a view or any component). On the inspector panel, select the first tab and remove the "Use Autolayout" checkbox. Your springs and struts will be back.
You have Autolayout enabled for the view, turn that off and it will look like what you expect. Autolayout is a new feature for iOS6 that allows more granular control of how things are laid out, and really enhances what was previously available via the struts and sprints via autoresizing masks.
To turn if off, open the Identify Inspector, and uncheck "Use Autolayout"
Same answer as the other two, but for projects using storyboards: instead of opening a xib file, you can simply open the storyboard to see the "Use Autolayout" checkbox in the inspector panel.