Please note, this blog entry is from a previous course. You might want to check out the current one.
Lecture #16 starts with modal view controllers (taking over the entire screen on the iPhone by covering it, on the iPad as pop overs) including unwind segues (providing data back to the presenting view controller).
… some information about text fields and keyboard control, alerts and action sheets …
The demo adds a modal view controller and some text fields to Photomania and shows the described concepts …
The code for this lecture is available at gitub as well as from Stanford
The lecture as well as its slides are available via iTunes called “16. Modal Segues, Text Fields, Alerts, and Action Sheets”.