CODEWITHSUNDEEP
iosswifthealthkit
Johnd
Johnd

Reputation: 624

Is it possible to delete a HealthKit entry from my app?

I'm making an app with HealthKit and want to try to add a swipe to delete on my table view. I know there is a healthStore.delete option, but will this delete from the Health app and how would I know which HKSample to delete from HealthKit.

Upvotes: 2

Views: 2584

Answers (3)

Jam
Jam

Reputation: 131

In the first step, you need to define your specific key in HKMetadataKeySyncIdentifier before you save your data to apple health. And then, you can use HKMetadataKeySyncIdentifier to delete specific health data.

let healthKitStore = HKHealthStore()

// SAVE
var meta = [String: Any]()
meta[HKMetadataKeySyncVersion] = 1
meta[HKMetadataKeySyncIdentifier] = "specific key"

let recordSample = HKQuantitySample(type: type, quantity: quantity, start: date, end: date, metadata: meta)
healthKitStore.save(bloodGlucoseSample) { success, error in
    if success {
        print("saving record to health success")
    } else {
        print("saving record to health error = \(String(describing: error))")
    }
}

// DELETE
let predicate = HKQuery.predicateForObjects(withMetadataKey: HKMetadataKeySyncIdentifier, allowedValues: ["specific key"])
healthKitStore.deleteObjects(of: bloodGlucoseType, predicate: predicate) { success, _, error in
    if success {
       print("delete health record success")
    } else {
       print("delete health record error = \(String(describing: error))")
    }
}

Upvotes: 2

Allan
Allan

Reputation: 7363

Yes, calling healthStore.deleteObject() will delete the sample from Health. However, keep in mind that your app may only delete samples that it saved to HealthKit.

You'll need to perform a query to retrieve the samples you want to show to the user. You could use HKSampleQuery or HKAnchoredObjectQuery.

Upvotes: 1

Nick B
Nick B

Reputation: 423

The HKSample class is an abstract class. Thus you should should never instantiate a HKSample object directly. Instead, you always work with one of the subclasses of HKSample (HKCategorySample, HKQuantitySample, HKCorrelation, or HKWorkout classes) where HKSampleClass1 would be one of the subclasses.

healthStore.deleteObject(HKSampleClass1) { (success: Bool, error: NSError?) -> Void in { 
    if success () {
      //success in deletion 
    }
}}

Upvotes: 2

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