導(dǎo)航欄隱藏之后切換到下一頁面之后，可能會(huì)有一下問題扫俺，轉(zhuǎn)場很生硬。
(參考鏈接)[http://www.reibang.com/p/7bec9ea95c86]
-(void)viewWillAppear:(BOOL)animated{
if (self.tabBarController.selectedIndex == 當(dāng)前tab下標(biāo)) {
[self.navigationController setNavigationBarHidden:YES animated:YES];
} else {
[self.navigationController setNavigationBarHidden:YES animated:NO];
}
}
-(void)viewWillDisappear:(BOOL)animated{
[self.navigationController setNavigationBarHidden:NO animated:YES];
}
