WatchKit watchOS 3.2 to 4.0 API Differences

WKAccessibility.h
Added WKAccessibilityIsReduceMotionEnabled()
Added WKAccessibilityReduceMotionStatusDidChangeNotification
WKBackgroundTask.h
Added -[WKRefreshBackgroundTask setTaskCompletedWithSnapshot:]
Added WKSnapshotReason
Added WKSnapshotReasonAppScheduled
Added WKSnapshotReasonReturnToDefaultState
Added WKSnapshotReasonComplicationUpdate
Added WKSnapshotReasonPrelaunch
Added WKSnapshotReasonAppBackgrounded
Added WKSnapshotRefreshBackgroundTask.reasonForSnapshot
Modified -[WKRefreshBackgroundTask setTaskCompleted]
AvailabilityDeprecation Message
FromAvailablenone
ToDeprecatedUse -setTaskCompletedWithSnapshot: instead, pass NO to duplicate existing behavior

Modified WKSnapshotRefreshBackgroundTask.returnToDefaultState
AvailabilityDeprecation Message
FromAvailablenone
ToDeprecatedUse reasonForSnapshot instead, WKSnapshotReasonReturnToPrimaryUI is equivalent to returnToDefaultState=true

WKExtension.h
Added WKExtension.visibleInterfaceController
Added WKExtension.isApplicationRunningInDock
Added WKExtension.autorotating
Added WKExtension.frontmostTimeoutExtended
Added -[WKExtension enableWaterLock]
Added -[WKExtensionDelegate deviceOrientationDidChange]
WKInterfaceController.h
Added WKPageOrientation
Added WKPageOrientationHorizontal
Added WKPageOrientationVertical
Added WKInterfaceScrollPosition
Added WKInterfaceScrollPositionTop
Added WKInterfaceScrollPositionCenteredVertically
Added WKInterfaceScrollPositionBottom
Added -[WKInterfaceController scrollToObject:atScrollPosition:animated:]
Added -[WKInterfaceController interfaceDidScrollToTop]
Added -[WKInterfaceController interfaceOffsetDidScrollToTop]
Added -[WKInterfaceController interfaceOffsetDidScrollToBottom]
Added +[WKInterfaceController reloadRootPageControllersWithNames:contexts:orientation:pageIndex:]
Modified -[WKInterfaceController handleUserActivity:]
AvailabilityDeprecation Message
FromAvailablenone
ToDeprecateduse WKExtensionDelegate's handleUserActivity:

Modified +[WKInterfaceController reloadRootControllersWithNames:contexts:]
AvailabilityDeprecation Message
FromAvailablenone
ToDeprecateduse reloadRootPageControllersWithNames:contexts:orientation:pageIndex:

Modified -[WKInterfaceController beginGlanceUpdates]
AvailabilityDeprecation Message
FromAvailablenone
ToDeprecatedGlances are no longer supported

Modified -[WKInterfaceController endGlanceUpdates]
AvailabilityDeprecation Message
FromAvailablenone
ToDeprecatedGlances are no longer supported

WKInterfaceDevice.h
Added WKInterfaceDeviceBatteryState
Added WKInterfaceDeviceBatteryStateUnknown
Added WKInterfaceDeviceBatteryStateUnplugged
Added WKInterfaceDeviceBatteryStateCharging
Added WKInterfaceDeviceBatteryStateFull
Added WKInterfaceDevice.batteryMonitoringEnabled
Added WKInterfaceDevice.batteryLevel
Added WKInterfaceDevice.batteryState