title: How can i add a spinner to UIImagePickerController?
body: <p>I'm calling UIImagePickerController in my app for uploading photo to the WebServer. I want to know how can i add a spinner to UIImagePickerController like below?</p>
  
  <p><img src="https://i.stack.imgur.com/Qrlw7.png" alt="ScreenShot"></p>