自定义uitarbarItem

-(void)viewDidAppear:(BOOL)animated{
   
    [self showBadgeValue:@"10"];
}

- (void)showBadgeValue:(NSString *)strBadgeValue
{
    UITabBar *tabBar = [[UITabBar alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
    UIImageView *imageView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0,100, 100)];
    [imageView setImage:[UIImage imageNamed:@"background.png"]];
    //[self.view addSubview:imageView];
    UITabBarItem *item = [[UITabBarItem alloc] initWithTitle:@"jjj" image:imageView.image tag:0];
    item.badgeValue = strBadgeValue;

    NSArray *array = [[NSArray alloc] initWithObjects:item, nil];
    tabBar.items = array;
    [self.view addSubview:tabBar];
    [item release];
    [array release];

   
    //寻找
//    for (UIView *viewTab in tabBar.subviews) {
//        for (UIView *subview in viewTab.subviews) {
//            NSString *strClassName = [NSString stringWithUTF8String:object_getClassName(subview)];
//            if ([strClassName isEqualToString:@"UITabBarButtonBadge"] ||
//                [strClassName isEqualToString:@"_UIBadgeView"]) {
//                //从原视图上移除
//                [subview removeFromSuperview];
//                //
//                [self.view addSubview:subview];
//                subview.frame = CGRectMake(self.frame.size.width-subview.frame.size.width, 0,
//                                           subview.frame.size.width, subview.frame.size.height);
//                [tabBar release];
//                return subview;
//            }
//        }
//    }
//    [tabBar release];
   
}

- (void)removeBadgeValue
{
    //
    for (UIView *subview in self.view.subviews) {
        NSString *strClassName = [NSString stringWithUTF8String:object_getClassName(subview)];
        if ([strClassName isEqualToString:@"UITabBarButtonBadge"] ||
            [strClassName isEqualToString:@"_UIBadgeView"]) {
            [subview removeFromSuperview];
            break;
        }
    }
}