UIApplication

UIApplicationはUIResponderのサブクラス。delegateはassign。

以下は調査中

isIgnoringInteractionEventsはイベント無視

keyWindow

windows

idleTimerDisabled
　UIControlがあれするところ

isNetworkActivityIndicatorVisible

statusBarStyle

statusBarHidden

statusBarOrientation

supportedInterfaceOrientationsForWindow

statusBarOrientationAnimationDuration

statusBarFrame

applicationIconBadgeNumber

applicationSupportsShakeToEdit

applicationState

beginBackgroundTaskWithExpirationHandler
endBackgroundTask

setMinimumBackgroundFetchInterval