Get the most recent BMI sample.
On success, the callback function will be provided with a bmi object containing the BMI value, and the startDate and endDate of the sample. Note: startDate and endDate will be the same as bmi samples are saved at a specific point in time.
AppleHealthKit.getLatestBmi(null, (err: string, results: HealthValue) => {
if (err) {
console.log('error getting latest bmi data: ', err)
Example output:
"value": 27.2,
"startDate": "2016-07-08T12:00:00.000-0400",
"endDate": "2016-07-08T12:00:00.000-0400"