how to find HKMetadataKeyMaximumSpeed

user_4756106 0
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I am wondering how to find a user's top speed using HealthKit.

I have come across this HKMetadataKeyMaximumSpeed but have no idea how to implement/use it. The docs are not very clear to me.

Can anyone provide any help here?

swift ios
2 Answers

Apple indicates thath :

HKMetadataKeyMaximumSpeed Set this key on a workout, workout segment, or a quantity sample that represents distance. Set its value to an HKQuantity object with a length/time unit (for example, m/s)

So you can use this function with this property :

func workoutSession(_ workoutSession: HKWorkoutSession, didGenerate event: HKWorkoutEvent) {

if event.type == .segment {
    
    let maxSpeed = event.metadata?[HKMetadataKeyMaximumSpeed]

    // do it here your logic     
}

Regarding to your comment: You can not genererate these events on the simulator.

user_145312200

There is example provided by Apple in docs.

func workoutSession(_ workoutSession: HKWorkoutSession, didGenerate event: HKWorkoutEvent) {
    
    // Check to see if the event is a segment.
    if event.type == .segment {
        
        // Get the segment's start and end times.
        let startTime = event.dateInterval.start
        let endTime = event.dateInterval.end
        
        // Get the segment's metadata.
        let averageSpeed = event.metadata?[HKMetadataKeyAverageSpeed]
        let maxSpeed = event.metadata?[HKMetadataKeyMaximumSpeed]
        let alpineSlope = event.metadata?[HKMetadataKeyAlpineSlopeGrade]
        let elevationAscended = event.metadata?[HKMetadataKeyElevationAscended]
        let elevationDescended = event.metadata?[HKMetadataKeyElevationDescended]
        
        // Do something with the segment data here...
        
    }
    
    // Also handle any other event types...
}
user_114714460
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