The UIViewController Class
UIViewController
is the parent class for view controllers and the one you use to manage your primary views. It is the workhorse of view controllers. You may spend a large part of your time customizing subclasses of this one class. The basic UIViewController
class manages each primary view’s lifetime from start to finish and takes into account the changes that the view must react to along the way.
UIViewController
instances are responsible for configuring how a view looks and what subviews it displays. Often they rely on loading that information from XIB or storyboard files. Instance methods let you manually create the view layout in code (loadView
) or add behavior after a view finishes loading (viewDidLoad
).
Reacting ...
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