iOS Please help me learn how to use HealthKit.

[moonman239]

I'm creating a small app that calculates a user's body mass index. To do this, I need to know how to get the height and weight information. I've read some Apple documentation (here's a link to Apple's HealtKit reference: HealthKit Framework Reference) and am now up to the part of the code that is executed when the HKQuery executed successfully. However, I do not know how to access the data. Will someone please help me? Thanks.

 

[TheWatchfulOne]

From the Class Hierarchy you linked to:

The HealthKit store acts as your link to all the data managed by HealthKit.

The HealthKit object is a piece of data that can be stored inside the HealthKit store.

The HKQuery class is the basis for all the query objects that retrieve data from the HealthKit store.

I would start by reading the references for those Classes to see how they are related and how they interact with each other. I've never messed with HealthKit myself so I can't tell you anything specific.

And just in case you did not know: HealthKit is being withheld until a bug is fixed. You won't be able to release a HealthKit app in the App Store just yet, but don't let that stop you from experimenting and learning it.

After a little further reading...

You might check out this method on HKSampleQuery and see if there's anything about it that interests you.

initWithSampleType:predicate:limit:sortDescriptors:resultsHandler:

 

[moonman239]

From the Class Hierarchy you linked to:







I would start by reading the references for those Classes to see how they are related and how they interact with each other. I've never messed with HealthKit myself so I can't tell you anything specific.

And just in case you did not know: HealthKit is being withheld until a bug is fixed. You won't be able to release a HealthKit app in the App Store just yet, but don't let that stop you from experimenting and learning it.

After a little further reading...

You might check out this method on HKSampleQuery and see if there's anything about it that interests you.

initWithSampleType:predicate:limit:sortDescriptors:resultsHandler:

Thanks, but I managed to find the answer. Apparently you have to get the data from the store object you're supposed to initialize.