CMHeadphoneMotionManager handler not called

Question

Hi,

Looking to experiment with the new CMHeadphoneMotionManager AirPods Motion API on iOS 14, but I'm facing issues with the CMHeadphoneMotionManager.startDeviceMotionUpdates handler not being called.

After installing the beta on an iPad Pro 11" (2020, iOS 14.0 18A5301v), I connect a pair of AirPod Pros (firmware 2D15, hardware 1.0.0), and run the following MVP reproducible case I'm using to test —

Code Block import UIKit
import CoreMotion
class ViewController: UIViewController, CMHeadphoneMotionManagerDelegate
 {
    var motionManager: CMHeadphoneMotionManager!
    override func viewDidLoad() {
        super.viewDidLoad()
        motionManager = CMHeadphoneMotionManager()
        motionManager.delegate = self
        if motionManager.isDeviceMotionAvailable {
            motionManager.startDeviceMotionUpdates(to: OperationQueue.main) { (motion, error) in
                print(error)
                print(motion)
            }
        }
    }
    func headphoneMotionManagerDidConnect(_ manager: CMHeadphoneMotionManager) {
        print("connect")
    }
    func headphoneMotionManagerDidDisconnect(_ manager: CMHeadphoneMotionManager) {
        print("disconnect")
    }
}

isDeviceMotionAvailable returns true, but the handler (and delegate methods) are never called.

Is there a sample project for CMHeadphoneMotionManager? Am I missing something obvious?

Thanks!

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Posted by

hturan

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CMHeadphoneMotionManager handler not called

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