IOS--关于NavigationController中的一些properties

//设置navigationBar的背景--

[setting_page.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"toubar.png"] forBarMetrics:UIBarMetricsDefault];

setting_page.navigationController.navigationBar.tintColor = [UIColor colorWithRed:0.31 green:0.64 blue:0.85 alpha:1.0];

//设置navigationItem 的title--

setting_page.navigationItem.title=@"设置";

//重写rightButton--
UIButton *BackBtn = [[UIButton alloc] initWithFrame:CGRectMake(0.0, 5, 50.0, 30.0)];
    [BackBtn setImage:[UIImage imageNamed:@"返回1.png"] forState:UIControlStateNormal];
    [BackBtn addTarget:self action:@selector(BackAction:) forControlEvents:UIControlEventTouchUpInside];
    UIBarButtonItem *BackBarBtn = [[UIBarButtonItem alloc] initWithCustomView:BackBtn];
    self.navigationItem.leftBarButtonItem = BackBarBtn;    
    [BackBtn release];
    [BackBarBtn release];
-(void)BackAction:(id)sender
{
    [self.navigationController popViewControllerAnimated:YES];
}