Data Capture Context Listener

Defined in framework ScanditCaptureCore

DataCaptureContextListener

protocol DataCaptureContextListener : NSObjectProtocol

Added in version 6.0.0

Interface for observing/listening to mode and status changes of a data capture context.

To observe changes of the data capture context, one or more DataCaptureContextListener may be added. These listeners provide hooks into different parts of the data capture context.

context

open func context(_ context: DataCaptureContext, didChange frameSource: (any FrameSource)?) -> Void

Added in version 6.0.0

Invoked when the data capture context changed the frame source. Also invoked if the frame source is reset to null.

context

open func context(_ context: DataCaptureContext, didAdd mode: any DataCaptureMode) -> Void

Added in version 6.0.0

Called when a mode got added to the context.

context

open func context(_ context: DataCaptureContext, didRemove mode: any DataCaptureMode) -> Void

Added in version 6.0.0

Called when a mode got removed from the context.

didStartObserving

optional func didStartObserving(_ context: DataCaptureContext) -> Void

Added in version 6.0.0

Called when the listener has been added to the data capture context and is from now on receiving events.

didStopObserving

optional func didStopObserving(_ context: DataCaptureContext) -> Void

Added in version 6.0.0

Called when the listener has been removed from the data capture context and is no longer receiving events.

context

open func context(_ context: DataCaptureContext, didChange contextStatus: ContextStatus) -> Void

Added in version 6.0.0

Called when a context status changed.