navigationBar添加背景图片

http://blog.csdn.net/iorchid/article/details/

 @interface UINavigationBar (MyCustomNavBar)
 @end

 @implementation UINavigationBar (MyCustomNavBar)
 - (void) drawRect:(CGRect)rect
 {
     UIImage *barImage = [UIImage imageNamed:@"title.png"];
     [barImage drawInRect:rect];
 }
 @end

方法二：

[cpp]  view plain copy

 - (void)viewWillAppear:(BOOL)animated
 {

     UIImageView *imageView = [[UIImageView alloc] initWithFrame: CGRectMake(0.0f, 0.0f, 320.0f, 44.0f)];
     imageView.image = [UIImage imageNamed: @"title.png"];
     [self.navigationController.navigationBar addSubview: imageView];
 }