So I'm trying to make an app where the user's heart rate variability is fetched and displayed to them. The issue is that Im not really sure how to convert the result I get from my query to a double, I have tried using
let quantity: HKQuantity? = result?.averageQuantity()
beats = quantity?.doubleValue(for: HKUnit.count().unitDivided(by: HKUnit.minute()))
print(beats)
but I would get the error "reason: 'Attempt to convert incompatible units: ms, count/min'" which is expected because the beats line is intended for average heart rate not heart rate variability. If i print out the quantity variable I do get the result back in this format "Optional(65.24 ms)".
My question is how do I properly convert the result from the first line from ms to a double? Or how can i display it on a label? Because in the ms form it won't work.
Thank for the help in advance guys
Found a solution. This is how to convert the heart rate variability result from MS to a double value. You can then change it to a string
beats = quantity?.doubleValue(for: HKUnit.secondUnit(with: .milli))