去除导航栏下方的横线

//去除导航栏下方的横线

    [self.navigationController.navigationBar setBackgroundImage:[UIImage createImageWithColor:RGBCOLOR(36, 150, 218, 1)]

                       forBarPosition:UIBarPositionAny

                           barMetrics:UIBarMetricsDefault];

    [self.navigationController.navigationBar setShadowImage:[UIImage new]];