After dismiss the imagePickerController, how to go back to the current tab instead of the default tab - uitabbarcontroller

Question

I have 4 tabs in the tab bar. Currently, I am working in the 4th tab, and having an imagePickerController. After the imagePickerController dismissed, it goes to the default tab (1st tab). How can I make it go to the current (4th) tab?
class EditMyPostViewController: UIViewController {
#IBOutlet weak var postImageView: UIImageView!
let imagePicker = UIImagePickerController()
override func viewDidLoad() {
super.viewDidLoad()
imagePicker.delegate = self
}
#IBAction func updatePhotoTapped(_ sender: Any) {
let alert = UIAlertController(title: "Add a picture", message: "How do you want to upload the picture?", preferredStyle: .alert)
alert.addAction(UIAlertAction(title: "Take Photo", style: .default, handler: { action in
self.takePhotoWithCamera()
}))
alert.addAction(UIAlertAction(title: "Use Existing Photo", style: .default, handler: { action in
self.getPhotoFromLibrary()
}))
self.present(alert, animated: true)
}
}
extension EditMyPostViewController: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
func takePhotoWithCamera() {
if (!UIImagePickerController.isSourceTypeAvailable(UIImagePickerController.SourceType.camera)) {
let alertController = UIAlertController(title: "No Camera", message: "The device has no camera.", preferredStyle: .alert)
let okAction = UIAlertAction(title: "OK", style: .default, handler: nil)
alertController.addAction(okAction)
present(alertController, animated: true, completion: nil)
} else {
imagePicker.allowsEditing = false
imagePicker.sourceType = .camera
present(imagePicker, animated: true, completion: nil)
}
}
func getPhotoFromLibrary() {
imagePicker.allowsEditing = false
imagePicker.sourceType = .photoLibrary
present(imagePicker, animated: true, completion: nil)
}
func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
dismiss(animated: true, completion: nil)
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
if let image = info[UIImagePickerController.InfoKey.originalImage] as? UIImage
{
postImageView.image = image
}
dismiss(animated: true, completion: nil)
}
}
The imagePicker is present in the 2 functions takePhotoWithCamera() and getPhotoFromLibrary().
In the last function, I tried to dismiss(animated: true, completion: nil), but it goes to the default tab instead of the current tab. How can I present the current ViewController?
I tried
present(self, animated: true, completion: nil)
But it will cause an Exception: Application tried to present modally an active controller