switchCamera method
void
switchCamera()
Implementation
void switchCamera() async {
isCameraFront = !isCameraFront;
transform += pi;
final cameras = await availableCameras();
int cameraPos = isCameraFront ? 0 : 1;
_cameraController =
CameraController(cameras[cameraPos], ResolutionPreset.high);
cameraValue = _cameraController.initialize();
notifyListeners();
}