#define COLOR_TOMATO    [UIColor colorWithRed:255/255.0f green:99/255.0f blue:71/255.0f alpha:1.0f]     /*!< 番茄色 */

 self.navigationController.navigationBar.barTintColor = COLOR_TOMATO;//修改导航栏颜色

     self.navigationController.navigationBar.titleTextAttributes = @{NSFontAttributeName:[UIFont systemFontOfSize:],

                                                                     NSForegroundColorAttributeName:[UIColor whiteColor]};    //修改字体大小和颜色