。。。。。。
ThirdViewController *thirdVC = [[ThirdViewControlleralloc]initWithTitle:@"搜索信息"];
//设置tabbarItem 的图片显示原图颜色;
thirdVC.tabBarItem = [[UITabBarItemalloc]initWithTitle:@"搜索"image:[[UIImageimageNamed:@"login_usernick"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal] selectedImage:[[UIImageimageNamed:@"login_usernick_highlighted"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
//一句话改变图片和文字的颜色均为红色选中时候
// [[UITabBar appearance]setTintColor:[UIColor redColor]];
//只是设置TabBarItem的字体颜色
[[UITabBarItemappearance] setTitleTextAttributes:[NSDictionarydictionaryWithObject:[UIColorblackColor] forKey:NSForegroundColorAttributeName] forState:UIControlStateNormal];
[[UITabBarItemappearance] setTitleTextAttributes:[NSDictionarydictionaryWithObject:[UIColorredColor] forKey:NSForegroundColorAttributeName] forState:UIControlStateSelected];
RootNavgationController*nav3 = [[RootNavgationControlleralloc]initWithRootViewController:thirdVC];
NSArray *VCs= [NSArray arrayWithObjects:nav1,nav2,nav3, nil];
tabControl.viewControllers = VCs;
self.window.rootViewController = tabControl;