UINavigationBar自定义导航栏背景和按钮

UINavigationBar自定义导航栏背景和按钮，完美支持横屏竖屏旋转，视图控制器可以分别使用自己的导航栏

此方法可以通过Apple审核，导航上的按钮背景需要做，否则看起来不那么和之又谐

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1. //CustomNavigationBar.h??
2. @interface?UINavigationBar?(UINavigationBarCategory)??
3. UIImageView?*backgroundView;??
4. -?(void)setBackgroundImage:(UIImage*)image;??
5. -?(void)insertSubview:(UIView?*)view?atIndex:(NSInteger)index;??
6. @end??
7. ??
8. //CustomNavigationBar.m??
9. @implementation?UINavigationBar?(UINavigationBarCategory)??
10. -(void)setBackgroundImage:(UIImage*)image??
11. {??
12. ????if(image?==?nil)??
13. ????{??
14. ????????[backgroundView?removeFromSuperview];??
15. ????}??
16. ????else??
17. ????{??
18. ????????backgroundView?=?[[UIImageView?alloc]?initWithImage:image];??
19. ????????backgroundView.tag?=?1;??
20. ????????backgroundView.frame?=?CGRectMake(0.f,?0.f,?self.frame.size.width,?self.frame.size.height);??
21. ????????backgroundView.autoresizingMask?=?UIViewAutoresizingFlexibleWidth?|?UIViewAutoresizingFlexibleHeight;??
22. ????????[self?addSubview:backgroundView];??
23. ????????[self?sendSubviewToBack:backgroundView];??
24. ????????[backgroundView?release];??
25. ????}??
26. }??
27. ??
28. //for?other?views??
29. -?(void)insertSubview:(UIView?*)view?atIndex:(NSInteger)index??
30. {??
31. ????[super?insertSubview:view?atIndex:index];??
32. ????[self?sendSubviewToBack:backgroundView];??
33. }??
34. @end??
35. ??
36. //YourViewController.m??
37. -?(void)viewWillAppear:(BOOL)animated??
38. {??
39. ????[super?viewWillAppear:animated];??
40. ????[self.navigationController.navigationBar??
41. ????????setBackgroundImage:[UIImage?imageNamed:@"navigation_bar_bg.png"]];??
42. }?