nested push animation can result in corrupted navigation bar

2014-07-05 17:11:20.594 SevenStars[2185:60b] nested push animation can result in corrupted navigation bar

2014-07-05 17:11:21.005 SevenStars[2185:60b] Finishing up a navigation transition in an unexpected state. Navigation Bar subview tree might get corrupted.

做tableview的点击delegate方法中进行界面的跳转，代码如下：

 case 4://度假卡绑定
        {
            MemberCardBindController * member = [[MemberCardBindController alloc]initWithNibName:@"MemberCardBindController" bundle:nil];
            member.titleName = @"度假卡绑定";
            [self.navigationController pushViewController:member animated:YES];
        }
            break;
        case 5://我的优惠券
        {
            MemberCouponslistController * coupon = [[MemberCouponslistController alloc]initWithNibName:@"MemberCouponslistController" bundle:nil];
            coupon.titleName = @"我的优惠券";
            [self.navigationController pushViewController:coupon animated:YES];

        }
            //break;
        case 6://收藏
        {
            ProductCollectionController * collection = [[ProductCollectionController alloc]initWithNibName:@"ProductCollectionController" bundle:nil];
            collection.titleName = @"我的收藏";
            [self.navigationController pushViewController:collection animated:YES];
        }

            break;

这样就会出现这样的错误，当你点击返回之后，一片空白。原因在于我case 5 的时候，没有跟break，郁闷啊，

nested push animation can result in corrupted navigation bar