title: file has been modified since the precompiled header was built
body: <p>So I accidentally modified a header (<code>CBCentralManager.h)</code> and caused the above error to show when I build. I searched stack overflow for the solution, and found <a href="https://stackoverflow.com/a/7072227/797767">this</a>. Even after deleting the derived data, I still get the same error. I've also tried to delete the <code>ModuleCache/FUW5IOHP9BIS</code> folder with no success. </p>
  
  <p>Here is the specific error I'm seeing:</p>
  
  <p><code>file /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk/System/Library/Frameworks/CoreBluetooth.framework/Headers/CBCentralManager.h' has been modified since the precompiled header '/var/folders/pj/hslm53_51xxd_npfqym5r6z00000gn/C/com.apple.DeveloperTools/5.0-5A1412/Xcode/5.0-5A1412/Xcode/ModuleCache/FUW5IOHP9BIS/CoreBluetooth.pcm was built</code></p>
  
  <p>Any help is greatly appreciated.</p>