The same code for fetching HKCorrelation (Blood Pressure) on iPhone returns all records, but on watch just 4. Is there a documentation explaining such behavior?
It looks like only records added after installing the app on watch are synced.
See Question&Answers more detail:
os 与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…