Unity , iOS integration

Hi, I'm trying to create an application with Unity and iOS. I have created iOS code from unity and I need to link it with unity code. Here is the tutorial I followed http://www.the-nerd.be/2014/08/06/add-unity3d-in-a-native-ios-application/ . Here the project build successfully and it gives a run time error **Uncaught exception: NSInternalInconsistencyException: createViewHierarchyImpl is deprecated and will not be called. Override willStartWithViewController** . Need a solution from experts. Thank you.