title: Can iOS sign in social account within app?
body: <p>I would like to make a social login function on the iOS application but I don't want to switch user to safari/Facebook app, Google +app etc when use connect more social account.
  I see the Flipboard app (iOS) can do that, when the user select "Add Google+" the current view controller push the Google+ sign in view controller to this screen so user can login on this without switch to the safari or Google App.</p>
  
  <p>Thanks,</p>
  
  <p><img src="https://i.stack.imgur.com/t44Zw.png" alt="enter image description here"></p>
  
  <p><img src="https://i.stack.imgur.com/UupFR.png" alt="enter image description here"></p>
  
  <p><img src="https://i.stack.imgur.com/PrEds.png" alt="enter image description here"></p>