What class can implement Document Objects?

Which method is used to deallocate all the noncritical custom data structure associated with your view controller?

How can an application respond to they keyboard being dismissed by the user

Which one is true?

If you have a CGPathRef and need to draw this path to a core animation layer, which object would you use.

When you download a file and the application go to background. You can ...

Which Messages framework classes is used to display a dynamically-generated list of stickers. which is capable of drag-and-drop functionality?

Which classes handles the editable content of a notification?

Which core extensions of Intents framework represents the entry point for an Intents extension?

Which classes handles the communication between a user and an app involving the intent object?

Sliced apps are supported by devices running: