iphone - 导航栏中的按钮颜色 - iPhone

Question

如何将此黄色按钮的色调设置为灰色？我尝试过添加图像，但没有成功。

这是屏幕截图:

这是我当前的代码:

- (id)initWithStyle:(UITableViewStyle)style {
    if (self = [super initWithStyle:style]) {

        UIBarButtonItem *addButton = [[UIBarButtonItem alloc]
                                      initWithTitle:NSLocalizedString(@"Settings", @"")
                                      style:UIBarButtonItemStyleDone
                                      target:self
                                      action:@selector(GoToSettings)];
        [addButton setImage:[[UIImage imageNamed:@"bg_table.png"] retain]];

        self.navigationItem.rightBarButtonItem = addButton;
        self.navigationItem.hidesBackButton = TRUE;
        self.view.backgroundColor = [UIColor blackColor];
    }
    return self;
}

Answer 1

self.navigationItem.rightBarButtonItem.tintColor = [UIColor colorWithRed:0.1f green:0.66f blue:0.26f alpha:0.7];