设置导航栏的背景图片及左右按钮图片

    self.navigationItem.title = kTabBarTitle1;

    self.navigationController.navigationBar.tintColor = navi_title_color;

    [self.navigationController.navigationBar setBackgroundImage: [UIImage imageNamed:@"bannar_1"] forBarMetrics:UIBarMetricsDefault];

    self.navigationItem.rightBarButtonItem =

    [PurseBarButtonItem rightBarButtonItemWithTag:BASIC_TAG+0 ImageName:@"icon_1" target:self action:@selector(pushVC:)];