ORKDataCollectionManager Class Reference

Inherits from	NSObject
Declared in	ORKDataCollectionManager.h

The data collection manager is used to collect HealthKit data and CoreMotion data.

It uses collectors to track data types to be collected. Anchors are used to track progress of each types of data to avoid duplications. Collected data samples are returned in the delegation methods, return YES to confirm the samples has been accepted.

`– initWithPersistenceDirectoryURL:`

Initiate the manager with a persistence directory. The directory is used to store the configurations and progress of the collectors.

- (instancetype)initWithPersistenceDirectoryURL:(NSURL *)directoryURL

Parameters

`directoryURL`	URL path for the directory.

Return Value

Initiated ORKDataCollectionManager instance.

Declared In

ORKDataCollectionManager.h

`collectors`

An array of collectors.

@property (copy, readonly) NSArray<ORKCollector*> *collectors

Declared In

ORKDataCollectionManager.h

`delegate`

Implement the delegate to receive collected data objects.

@property (nonatomic, weak, nullable) id<ORKDataCollectionManagerDelegate> delegate

Declared In

ORKDataCollectionManager.h

`– addHealthCollectorWithSampleType:unit:startDate:error:`

Add a collector for HealthKit quantity and category samples.

- (ORKHealthCollector *)addHealthCollectorWithSampleType:(HKSampleType *)sampleType unit:(HKUnit *)unit startDate:(NSDate *)startDate error:(NSError *_Nullable *)error

Parameters

`sampleType`	HealthKit sample type.
`unit`	HealthKit unit into which data should be collected.
`startDate`	Samples should be collected starting at this date.
`error`	Any error detected during this operation.

Return Value

Initiated health collector.

Declared In

ORKDataCollectionManager.h

`– addHealthCorrelationCollectorWithCorrelationType:sampleTypes:units:startDate:error:`

Add a collector for HealthKit correlations.

- (ORKHealthCorrelationCollector *)addHealthCorrelationCollectorWithCorrelationType:(HKCorrelationType *)correlationType sampleTypes:(NSArray<HKSampleType*> *)sampleTypes units:(NSArray<HKUnit*> *)units startDate:(NSDate *)startDate error:(NSError *_Nullable *)error

Parameters

`correlationType`	HealthKit correlation type.
`sampleTypes`	Array of HKSampleType expected in the correlation.
`units`	Array of HKUnit to use when serializing the samples collected (should be same size as sampleTypes).
`startDate`	Samples should be collected starting at this date.
`error`	Any error detected during this operation.

Return Value

Initiated health correlation collector.

Declared In

ORKDataCollectionManager.h

`– addMotionActivityCollectorWithStartDate:error:`

Add a collector for motion activity.

- (ORKMotionActivityCollector *)addMotionActivityCollectorWithStartDate:(NSDate *)startDate error:(NSError *_Nullable *)error

Parameters

`startDate`	When data collection should start.
`error`	Error during this operation.

Return Value

Initiated motion activity collector.

Declared In

ORKDataCollectionManager.h

`– removeCollector:error:`

Remove a collector.

- (BOOL)removeCollector:(ORKCollector *)collector error:(NSError *_Nullable *)error

Parameters

`collector`	The collector to be removed.
`error`	Error during this operation.

Return Value

If this operation is successful.

Declared In

ORKDataCollectionManager.h

`– startCollection`

Start data collection. This method triggers running all the RKCollector collections associated with the present manager. When the collection is completed, delegate recieves a method call dataCollectionManagerDidCompleteCollection:.

- (void)startCollection

Declared In

ORKDataCollectionManager.h