pattern A key that identifies the beginning of a haptic pattern definition. Declarationstatic let pattern: CHHapticPattern.Key See AlsoHaptic Pattern KeyseventeventDurationeventParameterseventTypeeventWaveformLoopEnabledeventWaveformPatheventWaveformUseVolumeEnvelopeparameterparameterCurveparameterCurveControlPointsparameterIDparameterValuetimeversion