HKSwimmingStrokeStyle.unknown The user’s stroke could not be determined. Declarationcase unknown See AlsoStrokesHKSwimmingStrokeStyle.backstrokeHKSwimmingStrokeStyle.breaststrokeHKSwimmingStrokeStyle.butterflyHKSwimmingStrokeStyle.freestyleHKSwimmingStrokeStyle.mixedHKSwimmingStrokeStyle.kickboard