title: How can I reference a Swift class in my WatchKit extension from the core iOS code?
body: <p>I am trying to make my iOS application send the WatchKit Extension a set of data each time that data is updated from the server.</p>
  
  <p>This is what the code in my iOS app looks like (names changed)<br></p>
  
  <p><code>[WatchKitDataModel loadDataFromSource: currentData]</code></p>
  
  <p>However, the iOS application does not recognize the WatchKitDataModel.</p>
  
  <p>The error is "use of undeclared modifier."</p>
  
  <p>Please help me make my apps talk to one another!</p>