首页 导航栏隐藏 下一级页面显示，pop回来遇到的问题

一级页面中

viewWillAppear 中

[super viewWillAppear:animated]; [self.navigationController setNavigationBarHidden:YES animated:animated];

viewWillDisappear中

self.navigationController.navigationBarHidden = NO; [super viewWillDisappear:animated];