title: present viewController open like like popup dialgo in swift 5
body: <p>I have menu. I have to navigate from one viewController to another viewController. But destination viewController is open like pop up dialog.I don't know why it shows.I did not adjust.  Here is the image
  <a href="https://i.stack.imgur.com/VyqRv.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/VyqRv.png" alt="enter image description here"></a></p>
  
  <p>Here is the code i have used for navigate one source viewController to destination viewController</p>
  
  <pre><code>       let mainstoryboard:UIStoryboard = UIStoryboard(name: "Main", bundle: nil)
          let newViewcontroller = mainstoryboard.instantiateViewController(withIdentifier: "Search_Mobile_Number") as! Search_Mobile_Number
          let newFrontController = UINavigationController.init(rootViewController: newViewcontroller)
          self.present(newFrontController, animated: true, completion: nil)
  </code></pre>
  
  <p>Please help me why it is open like dialog.</p>