GeolocationCoordinates.heading read-only property is
double representing the direction in which the device is traveling. This
value, specified in degrees, indicates how far off from heading due north the device is.
Zero degrees represents true north, and the direction is determined
clockwise (which means that east is
90 degrees and west is
the device is not able to provide heading information, this value is
let heading = geolocationCoordinatesInstance.heading
double representing the direction in which the device is traveling.
The definition of 'GeolocationCoordinates.heading' in that specification.
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