[Q-A]使用方法询问：设置的backgroundImage不显示

[alexiiio]

---

---

My issue:

    self.tabBar.backgroundImage = [UIImage imageNamed:@"666"];

设置backgroundImage不显示，设置0个tabBarItem时显示，设置多个item时就不显示，只是给item设置了图片，用了最基本的代码，其他没做：

  NSDictionary *firstTabBarItemsAttributes = @{
//                                                CYLTabBarItemTitle : @"首页",
                                                CYLTabBarItemImage : @"home_normal",  /* NSString and UIImage are supported*/
                                                CYLTabBarItemSelectedImage : @"home_highlight",  /* NSString and UIImage are supported*/
                                                };
   NSDictionary *secondTabBarItemsAttributes = @{
//                                                 CYLTabBarItemTitle : @"鱼塘",
                                                 CYLTabBarItemImage : @"fishpond_normal",
                                                 CYLTabBarItemSelectedImage : @"fishpond_highlight",
                                                 };
    NSDictionary *thirdTabBarItemsAttributes = @{
 //                                                 CYLTabBarItemTitle : @"鱼塘",
                                                  CYLTabBarItemImage : @"account_normal",
                                                  CYLTabBarItemSelectedImage : @"account_highlight",
                                                  };

求解！