The Core iOS Developer’s Cookbook, Fifth Edition

Recipe: Basic Popovers

At the time of this writing, popovers remain an iPad-only feature. That may change as Apple introduces new iOS models or ports some of this functionality to the iPhone family of devices. Often you’ll want to present information using a popover as an alternative to presenting a modal view. There are several basic rules of popovers that you need to incorporate into your day-to-day development:

Always hang onto your popovers. Create strong local variables that retain your popovers until they are no longer needed. In Recipe 3-5, the variable is reset when the popover is dismissed.

Always check for existing popovers and dismiss ...