Global UINavigationBar style

gistfile1.m

    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackOpaque animated:NO];
    [[UINavigationBar appearance] setBackgroundImage:[UIImage imageNamed:@"navigationBar_bg.png"] forBarMetrics:UIBarMetricsDefault];
    [[UINavigationBar appearance] setTintColor:[UIColor colorWithRed:121/255 green:123/255 blue:126/255 alpha:1.0] ];    
    [[UIBarButtonItem appearance] setTintColor:RGBACOLOR(55, 61, 70, 1)];