walkingSpeed
A quantity sample type that measures the user’s average speed when walking steadily over flat ground.
Declaration
static let walkingSpeed: HKQuantityTypeIdentifierDiscussion
Walking speed represents how quickly the user walks on flat ground. The system automatically records walking speed samples on iPhone 8 or later. The user must carry their phone near their waist—such as in a pocket—and walk steadily on flat ground. To ensure accuracy, the user’s height value must be up to date. The system records 10 to 30 walking speed samples on a typical day. iPhone doesn’t record walking speed samples if the user’s wheelchair status is on.
These samples use distance per time units (described in HKUnit) and measure discrete values (described in HKQuantityAggregationStyle). For example, the following code shows two ways to create a meters per second unit. The first uses explicit constructors, while the second initializes the unit from a string.
let mps = HKUnit.meter().unitDivided(by: HKUnit.second())
let mpsFromString = HKUnit(from: "m/s")The sample’s quantity property represents the average walking speed between the sample’s startDate and endDate properties.