UINavigationBar *navigationBar = self.navigationController.navigationBar;[navigationBar setBackgroundImage:[UIImage imageNamed:@"parentTopBackgroupd"] forBarPosition:UIBarPositionAny barMetrics:UIBarMetricsDefault];[navigationBar setShadowImage:[UIImage new]];原文：http://www.cnblogs.com/wskgjmhh/p/4899455.html