ORKAccelerometerRecorder Class Reference

Inherits from	ORKRecorder : NSObject
Declared in	ORKAccelerometerRecorder.h

The ORKAccelerometerRecorder class represents a recorder that requests and collects raw accelerometer data from CoreMotion at a fixed frequency.

The accelerometer recorder continues to record when the application enters the background by using the background task support provided by UIApplication.

`frequency`

The frequency of accelerometer data collected from CoreMotion, in hertz (Hz).

@property (nonatomic, readonly) double frequency

Declared In

ORKAccelerometerRecorder.h

`– initWithIdentifier:frequency:step:outputDirectory:`

Returns an initialized accelerometer recorder using the specified frequency.

- (instancetype)initWithIdentifier:(NSString *)identifier frequency:(double)frequency step:(nullable ORKStep *)step outputDirectory:(nullable NSURL *)outputDirectory

Parameters

`identifier`	The unique identifier of the recorder (assigned by the recorder configuration).
`frequency`	The frequency of accelerometer data collected from CoreMotion, in hertz (Hz).
`step`	The step that requested this recorder.
`outputDirectory`	The directory in which the accelerometer data should be stored.

Return Value

An initialized accelerometer recorder.

Declared In

ORKAccelerometerRecorder.h