UINavigationBar自定义背景以及按钮

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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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//CustomNavigationBar.h@interface UINavigationBar (UINavigationBarCategory)UIImageView *backgroundView;- (void)setBackgroundImage:(UIImage*)image;- (void)insertSubview:(UIView *)view atIndex:(NSInteger)index;@end//CustomNavigationBar.m@implementation UINavigationBar (UINavigationBarCategory)-(void)setBackgroundImage:(UIImage*)image{if(image == nil){[backgroundView removeFromSuperview];}else{backgroundView = [[UIImageView alloc] initWithImage:image];backgroundView.tag = 1;backgroundView.frame = CGRectMake(0.f, 0.f, self.frame.size.width, self.frame.size.height);backgroundView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;[self addSubview:backgroundView];[self sendSubviewToBack:backgroundView];[backgroundView release];}}//for other views- (void)insertSubview:(UIView *)view atIndex:(NSInteger)index{[super insertSubview:view atIndex:index];[self sendSubviewToBack:backgroundView];}@end//YourViewController.m- (void)viewWillAppear:(BOOL)animated{[super viewWillAppear:animated];[self.navigationController.navigationBarsetBackgroundImage:[UIImage imageNamed:@"navigation_bar_bg.png"]];}