title: Class Method Not Found (return type defaults to 'id')
body: <p><br/>
  I am getting the warning Class method '+getInsuredDOB' not found (return type defaults to 'id') from XCode. I have already declared the method in my .h file. I can't figure out why there is a warning. <br/>
  Here is my .h file</p>
  
  <pre><code>@interface Sample : NSObject
  {
  }
  + (NSString*) getInsuredDOB; 
  </code></pre>
  
  <p>Here is my .m file</p>
  
  <pre><code>@implementation Sample
  + (NSString*) getInsuredDOB 
  {   
      return @"Testing";
  }
  
  @end
  </code></pre>
  
  <p>Here is where I use the class method and where the warning is.</p>
  
  <pre><code>#import "Sample.h"
  
  NSLog(@"DOB is %@",[Sample getInsuredDOB]); //Warning here
  </code></pre>
  
  <p>Any help would be much appreciated. Thank you.</p>