摘要：灰色背景的类只在OS X中支持。NSObject// Value ObjectsNSAffineTransformNSCalendarNSCacheNSDataNSMutableDataNSPurgeableDataNSDateComponentsNSDecimalNumberHandlerNSLocaleNSNullNSTimeZoneNSValueNSNumberNSDecimalNumberNSValueTransformer// XMLNSXMLParser// StringsNSCharacterSetNSMutableCharacterSetNSStringNSMutableStr 阅读全文

摘要：NSObjectUIAccelerationUIAccelerometerUIAccessibilityElementUIBarItemUIBarButtonItemUITabBarItemUIBezierPathUIColorUIDeviceUIDocumentInteractionControllerUIEventUIFontUIGestureRecognizerUILongPressGestureRecognizerUIPanGestureRecognizerUIPinchGestureRecognizerUIRotationGestureRecognizerUISwipeGesture 阅读全文

摘要：应用程序和多任务用户界面DataGlobalization & LocalizationConcurrencyCommunicationMediaGraphics & Animations 阅读全文