var recordButton = RecordButton()

fileprivate func setupRecordingButton() {
  recordButton.isRecording = false
  recordButton.addTarget(self, action: #selector(handleRecording(_:)), for: .touchUpInside)
  view.addSubview(recordButton)
  recordButton.translatesAutoresizingMaskIntoConstraints = false
  recordButton.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: -32).isActive = true
  recordButton.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
  recordButton.widthAnchor.constraint(equalToConstant: 65).isActive = true
  recordButton.heightAnchor.constraint(equalToConstant: 65 ).isActive = true
}