FBViewController class is a base class encapsulating functionality common to several
other view controller classes. Specifically, it provides UI when a view controller is presented
modally, in the form of optional Cancel and Done buttons.
The Cancel button to display when presented modally. If nil, no Cancel button is displayed. If this button is provided, its target and action will be redirected to internal handlers, replacing any previous target that may have been set.
The view into which derived classes should put their subviews. This view will be resized correctly depending on whether or not a toolbar is displayed.
The delegate that will be called when Cancel or Done is pressed. Derived classes may specify derived types for their delegates that provide additional functionality.
The Done button to display when presented modally. If nil, no Done button is displayed. If this button is provided, its target and action will be redirected to internal handlers, replacing any previous target that may have been set.
Provides a wrapper that presents the view controller modally and automatically dismisses it when either the Done or Cancel button is pressed. If Done is pressed, the block provided by the doneHandler parameter is called.
The view controller that is presenting this view controller.
If YES, presenting and dismissing the view controller is animated.
The block called when the Done or Cancel button is pressed.
A block that is passed to [FBViewController presentModallyInViewController:animated:handler:] and called when the view controller is dismissed via either Done or Cancel.
Pass a block of this type when calling addRequest. This will be called once the request completes. The call occurs on the UI thread.