导航栏颜色的设置

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
    [self initializeUserInterface];
}

- (void)initializeUserInterface
{
    self.view.backgroundColor = [UIColor colorWithRed:0.936 green:0.941 blue:0.936 alpha:1.000];
    
    UILabel *title = [[UILabel alloc] initWithFrame:self.view.bounds];
    title.textColor = [UIColor whiteColor];
    title.backgroundColor = [UIColor clearColor];
    title.textAlignment = NSTextAlignmentCenter;
    title.text = @"产品库";
    title.font = [UIFont fontWithName:@"Helvetica-Bold" size:20];
    self.navigationItem.titleView = title;
    
  [self.navigationController.navigationBar setBarTintColor:[UIColor colorWithRed:0.164 green:0.657 blue:0.915 alpha:1.000]];
    

}