startAbsoluteAltitudeUpdates(to:withHandler:)
Starts the delivery of absolute altitude data to the specified handler.
Declaration
func startAbsoluteAltitudeUpdates(to queue: OperationQueue, withHandler handler: @escaping CMAbsoluteAltitudeHandler)Parameters
- queue:
The operation queue on which to execute your handler block. The altimeter object stores a strong reference to this object. This parameter must not be
nil. - handler:
The handler block to execute when new altitude data is available. This parameter must not be
nil. For information about the format of this block, see Cmabsolutealtitudehandler.
Discussion
Call isAbsoluteAltitudeAvailable() to verify that the current device supports absolute altitude updates before calling the startAbsoluteAltitudeUpdates(to:withHandler:) method.