Using AVCaptureEventInteraction for Volume Button Shutter Capture

Question

I've been officially notified that iOS 17.2 contains the new API to officially support volume button actuation for photo capture in a camera app.

API is called AVCaptureEventInteraction Link

So If I use the AVCam sample code, How would I be able to attach this interaction?

    if #available(iOS 17.2, *) {
       let interaction = AVCaptureEventInteraction { event in
             print ("AVCaptureEventInteraction Fired")
       }
    }

API does not contain any details.

Answer 1

AVCaptureEventInteraction implements the UIInterAction protocol. So you should attach the AVCaptureEventInteraction to a UI element (e.g. your shutter button) that is part of the responder chain.

Example:

if #available(iOS 17.2, *) {
    let shutterEventInteraction = AVCaptureEventInteraction.init { event in
        print(event)
        if (event.phase == AVCaptureEventPhase.began) {
            self.performCapture()
        }
    }
    shutterEventInteraction.isEnabled = true
    self.shutterButton.addInteraction(shutterEventInteraction)
}