title: iOS linkedin authentication
body: <p>I started developing an app for iOS in Swift. Now I am at the part where I need to create a login system. However we need the LinkedIn information from people.</p>
  
  <p>How can I use the OAuth2 API in iOS to achieve this?</p>
  
  <p>I already created an app in the LinkedIn developers area, but now I am stuck. I got some advice from someone that I need to use the <code>UIWebView</code> but I have no clue how this works.</p>