ORKDeviceMotionRecorder Class Reference
| Inherits from | ORKRecorder : NSObject |
|---|---|
| Declared in | ORKDeviceMotionRecorder.h |
The ORKDeviceMotionRecorder class represents a recorder that requests and collects device motion data from CoreMotion at a fixed frequency.
To ensure that the motion recorder continues to record when the app enters the
background, use the background task support provided by UIApplication.
frequency
The frequency of motion data collection from CoreMotion in hertz (Hz).
@property (nonatomic, readonly) double frequencyDeclared In
ORKDeviceMotionRecorder.h
– initWithIdentifier:frequency:step:outputDirectory:
Returns an initialized device motion recorder using the specified frequency.
- (instancetype)initWithIdentifier:(NSString *)identifier frequency:(double)frequency step:(nullable ORKStep *)step outputDirectory:(nullable NSURL *)outputDirectoryParameters
identifier |
The unique identifier of the recorder (assigned by the recorder configuration). |
|---|---|
frequency |
The frequency of motion data collection from CoreMotion in hertz (Hz). |
step |
The step that requested this recorder. |
outputDirectory |
The directory in which the device motion data should be stored. |
Return Value
An initialized motion data recorder.
Declared In
ORKDeviceMotionRecorder.h