UITableView does not show up after Listing 27.8, XCode 8.3.3

I’m using XCode 8.3.3, and after setting up the UITableView (as shown in Listing 27.8), I do not see it being rendered in the iOS simulator. Am I missing something somewhere?

Never mind. Figured it out–the constraints for Auto Layout somehow didn’t persist (Figure 27.13). After I re-selected the constraints, the TableView rendered and was visible.