更改NavigationController的背景图片

NSString *navName = @"CMN_navigationItem_bg.png";

@interface MyNavigationBar : UINavigationBar

@end

@implementation MyNavigationBar

- (void)drawRect:(CGRect)rect

{

    if (navName == nil)

    {

        [super drawRect:rect];

    }

    else

    {

        UIImage *image = [UIImage imageNamed: navName];  //背景图片

        [image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];

    }

}

@end

@implementation UINavigationBar (CoustomNavigation)

+ (Class)class

{

    return NSClassFromString(@"MyNavigationBar");

}

@end