Better way to run multiple HealthKit sample queries?

Question

I have a scenario where I need to retrieve multiple sets of data from HealthKit -- body temperature, weight, and blood pressure. I need all 3 before I can continue processin

Answer 1

I ran into this same problem, and a much better approach for any kind of nested async call would be to use GCD's dispatch groups. These allow you to wait until multiple async tasks have completed.

Here's a link with an example: Using dispatch groups to wait for multiple web services