- (void)viewDidLoad {

     [super viewDidLoad];

     UITabBar *tabBar = self.tabBar;

     UIView *backView = [[UIView alloc] initWithFrame:CGRectMake(, , tabBar.frame.size.width, tabBar.frame.size.height)];

     backView.backgroundColor = [UIColor whiteColor];

     [tabBar insertSubview:backView atIndex:];

     UITabBarItem *item0 = [tabBar.items objectAtIndex:];

     UITabBarItem *item1 = [tabBar.items objectAtIndex:];

     UITabBarItem *item2 = [tabBar.items objectAtIndex:];

     UITabBarItem *item3 = [tabBar.items objectAtIndex:];

     item0.image = [[UIImage imageNamed:@"shouye2"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

     item0.selectedImage = [[UIImage imageNamed:@"shouye1"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

     item1.image = [[UIImage imageNamed:@"shoucang2"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

     item1.selectedImage = [[UIImage imageNamed:@"shoucang1"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

     item2.image = [[UIImage imageNamed:@"xiaoxi2"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

     item2.selectedImage = [[UIImage imageNamed:@"xiaoxi1"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

     item3.image = [[UIImage imageNamed:@"wode2"]imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

     item3.selectedImage = [[UIImage imageNamed:@"wode1"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

     [[UITabBarItem appearance] setTitleTextAttributes: [NSDictionary dictionaryWithObjectsAndKeys:

                                                         [UIColor redColor],

                                                         UITextAttributeTextColor, nil] forState:UIControlStateSelected];

 }