// 设置控制器的title

    self.title = @"O(∩_∩)O哈哈~";

    

    // 设置navigationbar 的样式

   // self.navigationController.navigationBar.barStyle = UIBarStyleBlackTranslucent;

    

    // 设置navigationbar 的背景图

    //[self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"password"] forBarMetrics:UIBarMetricsDefault];

    

    // 设置左右按钮

    UIBarButtonItem *leftBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"左边" style:UIBarButtonItemStylePlain target:self action:@selector(clickBarButtonItem)];

    self.navigationItem.leftBarButtonItem = leftBarButtonItem;

    

    UIBarButtonItem *rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"右边" style:UIBarButtonItemStylePlain target:self action:@selector(clickBarButtonItem)];

    self.navigationItem.rightBarButtonItem = rightBarButtonItem;