deviceMotionAnchor(manager:isEnabled:)

Declaration

nonisolated func deviceMotionAnchor(manager: CMMotionManager, isEnabled: Bool = true) -> some View

Parameters

• manager:

  The motion manager to specify this view as the body of.

• isEnabled:

  Whether this view should be the manager’s body.

Discussion

@State private var motionManager = CMMotionManager()

var body: some View {
    MyView()
        .deviceMotionAnchor(manager: motionManager)
}

If more than one view specifies itself as the body of the same manager, the most recent one to do so becomes the body. Once a view stops being the body, whether because it disappeared or because isEnabled became false, the manager has no body until some view specifies one again.

Use isEnabled to pick between views which are all on screen. For example, a map might anchor device motion to a puck, except while navigating, when it anchors to a vehicle icon instead:

ZStack {
    Puck()
        .deviceMotionAnchor(manager: motionManager,
                            isEnabled: !isNavigating)
    VehicleIcon()
        .deviceMotionAnchor(manager: motionManager,
                            isEnabled: isNavigating)
}