ios, healthkit observer query

Question

I am writing an ios app with health kit integration. I want my application to be notified by health app whenever new heart rate data get saved in health app and that new data fall behind lower limit or exceeds upper limit.

For example lower limit - > 50, upper limit -> 100, so

if(newHeartRateData<50 OR newHeartRateData>100)

then application needs to be notified.

I am using observer query for this but not getting clue how to insert predicate for lower and upper limit.

Any help would be appreciated. Thanks

Answer 1

您可以使用HKQuery的predicateForQuantitySamplesWithOperatorType：quantity：方法返回的谓词，按数量值过滤样本。