iOS tabbar隐藏慢

[[UITabBar appearance] setTranslucent:YES]的情况下跳转二级页面隐藏tabbar慢

基类中添加

• (void)viewDidLoad {
  [super viewDidLoad];
  if (self.navigationController.viewControllers.count>1) {
  self.tabBarController.tabBar.hidden = YES;
  }
  }