使用

UINavigationController *navigationController =[[UINavigationController alloc] initWithRootViewController:[[UIViewController alloc] init]];

[navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"nav_bg.png"]];

[navigationController.navigationBar setTitleColor:[UIColor whiteColor]];

tabbaritem

self.navigationItem.indicatorImage =[UIImage imageNamed:@"nav_bak"];
self.navigationItem.indicatorHighlightedImage =[UIImage imageNamed:@"nav_bak_hl"];


[self.navigationItem setLeftBarButtonTitle:title  target:self action:@selector(leftButtonAction) indicator:showImage];



 [self.navigationItem setRightBarButtonTitle:rightStr  target:self action:@selector(rightButtonAction)];