set image and textcolur to navigation item

self.navigationController.navigationBarHidden = NO;

    

    UIImage *image = [UIImage imageNamed: @"nav_bar.png"];

    [self.navigationController.navigationBar setBackgroundImage:image forBarMetrics:UIBarMetricsDefault];

    

    

    UILabel *label = [[[UILabel alloc] initWithFrame:CGRectZero] autorelease];

    label.backgroundColor = [UIColor clearColor];

    label.font = [UIFont boldSystemFontOfSize:16.0];

    label.shadowColor = [UIColor colorWithWhite:0.0 alpha:0.0];

    label.textAlignment = UITextAlignmentCenter;

    label.textColor = [UIColor blackColor]; // change this color

    self.navigationItem.titleView = label;

    label.text = NSLocalizedString(@"Services", @"");

    [label sizeToFit];