title: Swift 3 select multiple photos using UIImagePickerController
body: <p>I have a <code>UIImagePickerController</code> which with it I select a photo from Library, or take a photo with Camera and then show the selected photo in a <code>UIImageView</code>. I want to upload this photo later to an API (which still don't know how to upload photos, have never done it).</p>
  
  <p>So what I want is a feature like WhatsApp selecting photos feature which you can select let's say 20 photos and then you can see them. (I mean for my case I only have one <code>UIImageView</code> and can only show one photo.</p>
  
  <p>What is the solution? please keep in mind that I want to upload this photos later.</p>
  
  <p>Thanks in advance</p>