title: Send messages between iOS and WatchOS with WatchConnectivity in watchOS2
body: <p>I watched the WWDC2015 and saw that you can develop native apps on the watch now. This opened up a lot of capabilities and I am wondering how I could send data between my iOS app and my AppleWatch app.</p>
  
  <p>I saw that there is a new framework called WatchConnectivity. How can I use this and what are my options when sending data back and forth?</p>