override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
self.navigationController?.setNavigationBarHidden(true, animated: true)
}
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(animated)
self.navigationController?.setNavigationBarHidden(false, animated: true)
}
self.hidesBottomBarWhenPushed=YES; BViewController *bvc=[[BViewController alloc]init]; [self.navigationController pushViewController:bvc animated:YES]; self.hidesBottomBarWhenPushed=NO; //最后一句话,可以保证在back回到A时,tabBar会恢复正常显示
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