如何在iOS中将相机视图方向锁定为横向？

override var supportedInterfaceOrientations: UIInterfaceOrientationMask {
    return .landscape
}

override var shouldAutorotate: Bool {
    return false
}

let imagePickerController = UIImagePickerController()
imagePickerController.sourceType = .camera
imagePickerController.cameraCaptureMode = .photo
imagePickerController.cameraDevice = .rear
imagePickerController.cameraOverlayView = cameraOverlayView // 自定义相机界面
imagePickerController.showsCameraControls = false
imagePickerController.delegate = self

// 设置相机方向
imagePickerController.cameraViewTransform = CGAffineTransform(rotationAngle: .pi/2)