text: //
  //  UINavigationBar-CustomBackground.h
  //  PSFoundation
  //
  //  Created by Peter Steinberger on 05.10.10.
  //  Copyright 2010 Peter Steinberger. All rights reserved.
  //
  
  @interface UINavigationBar (CustomBackground)
  
  - (void)drawRectCustomBackground:(CGRect)rect;
  
  @end
  
   /* Method Swizzling /
  
  // Get our drawRectCustomBackground method
  Method drawRectCustomBackground = class_getInstanceMethod([UINavigationBar class], @selector(drawRectCustomBackground:));
  
  // Get the original drawRect method
  Method drawRect = class_getInstanceMethod([UINavigationBar class], @selector(drawRect:));
  
  // Swap the methods, drawRect now becomes drawRectCustomBackground and vice-versa
  method_exchangeImplementations(drawRect, drawRectCustomBackground);
  
  / End Method Swizzling */
  