ios开发：navigationBar、 tabBar的设置

//导航栏左右按钮图片和文字的颜色(系统自己的图片和文字)
 self.navigationController.navigationBar.tintColor = [UIColor whiteColor];
 //UIBarMetricsDefault   竖屏格式  高度：44
    [self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"navigationbar.png"] forBarMetrics:UIBarMetricsDefault];
    //UIBarMetricsCompact   横屏样式   高度：32
    [self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"nav-32.png"] forBarMetrics:UIBarMetricsCompact];
//调导航栏标题的的颜色和大小
    [self.navigationController.navigationBar setTitleTextAttributes:@{NSFontAttributeName:[UIFont systemFontOfSize:18],NSForegroundColorAttributeName:[UIColor blueColor]}];

//导航页面的跳转
    [self.navigationController pushViewController:seven  animated:YES];
    [self.navigationController popToRootViewControllerAnimated:YES];
    //self.navigationController.viewControllers  找到push过去的页面，并放到数组里面
    NSArray *viewController = self.navigationController.viewControllers;
    [self.navigationController popToViewController:viewController[2] animated:YES];
    #pragma mark - 按钮的点击事件
    - (void)buttonClick:(UIButton *)button{
     //返回任意某一页
    //self.navigationController.viewControllers  找到push过去的页面，并放到数组里面
        NSArray *viewController = self.navigationController.viewControllers;
        [self.navigationController popToViewController:viewController[2] animated:YES];
    }
//整体全局更改title的文字和颜色和大小
  NSDictionary *dic = @{NSForegroundColorAttributeName : [UIColor redColor], NSFontAttributeName : [UIFont systemFontOfSize:17.0]};   
 [[UINavigationBar appearance] setTitleTextAttributes:dic];

//设置选项栏项文字选中和不选中的显示状态(颜色或是大小)
    [nav1.tabBarItem setTitleTextAttributes:dic forState:UIControlStateNormal];
    [nav1.tabBarItem setTitleTextAttributes:selectDic forState:UIControlStateSelected];
//设置选中tabBar选中后图片的颜色额
    [self.tabBar setSelectedImageTintColor:[UIColor whiteColor]];
//设置tabBar样式
    [self.tabBar setBarStyle:UIBarStyleBlack];
//设置按钮跳转到tabBar的任意一个view
    self.tabBarController.selectedViewController = self.tabBarController.viewControllers[1];