常用代码

1. 实现导航栏push时隐藏标签栏
   抽出一个导航控制器类复写push方法
   [objc] view plain copy

• (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated
  {
  if (self.viewControllers.count > 0) {
  viewController.hidesBottomBarWhenPushed = YES;
  }
  [super pushViewController:viewController animated:animated];
  }