HKSwimmingStrokeStyle.butterfly The user swam the butterfly stroke. Declarationcase butterfly See AlsoStrokesHKSwimmingStrokeStyle.backstrokeHKSwimmingStrokeStyle.breaststrokeHKSwimmingStrokeStyle.freestyleHKSwimmingStrokeStyle.mixedHKSwimmingStrokeStyle.kickboardHKSwimmingStrokeStyle.unknown