iOS页面之间跳转隐藏UITabbar

//隐藏tabbar

    self.tabBarController.tabBar.hidden =YES;

    self.hidesBottomBarWhenPushed = YES;    

    MyChoiseCityController *citygroup =[[MyChoiseCityController alloc]init];

    [self.navigationController pushViewController:citygroup animated:true];

    self.hidesBottomBarWhenPushed = NO;