gistfile1.txt

class CameraView: UIView {
 
    override class func layerClass() -> AnyClass! {
        return object_getClass(AVCaptureVideoPreviewLayer())
    }
 
    var captureLayer: AVCaptureVideoPreviewLayer {
        return layer as AVCaptureVideoPreviewLayer
    }
    
    var captureSession: AVCaptureSession {
        get {
            return captureLayer.session
        }
        set {
            captureLayer.session = newValue
        }
    }
}