title: How to create an umbrella framework in iOS SDK?
body: <p>I want to create an umbrella framework in iOS SDK. My requirements are:</p>
  
  <p>I have a framework called "Framework A", I want to create another framework called "Framework B". I want to add "Framework A" into "Framework B" as a sub-framework and users only need to import "Framework B" in their project to use both "Framework A" and "Framework B". In other words, "Framework B" will work as a wrapper for "Framework A". I read out from Apple via following link regarding framework creations: </p>
  
  <p><a href="https://developer.apple.com/library/ios/documentation/MacOSX/Conceptual/BPFrameworks/Concepts/FrameworkAnatomy.html" rel="noreferrer">https://developer.apple.com/library/ios/documentation/MacOSX/Conceptual/BPFrameworks/Concepts/FrameworkAnatomy.html</a></p>
  
  <p>but it doesn't expose the way to create an umbrella framework.</p>
  
  <p>Please suggest step by step method to create an umbrella framework.</p>