reactionEffectsInProgress
An array of reaction effects that the device is currently performing, sorted by timestamp.
Declaration
var reactionEffectsInProgress: [AVCaptureReactionEffectState] { get }Discussion
Key-value observe this property to determine when reaction effects begin and end. If your key-value observing callback provides old and new values, any in-progress reaction effects in the new array have a value of invalid for their endTime property value. Completed reaction effects are only in the old array, and have their endTime property value set to the presentation time of the first frame where the reaction effect was no longer present.