iOS开发——导航栏的一些小设置

　　1.导航栏的隐藏与显示：navigationBarHidden

- (void)viewWillAppear:(BOOL)animated {

    [super viewWillAppear:YES];

    self.navigationController.navigationBarHidden = YES;

}

- (void)viewWillDisappear:(BOOL)animated {

    [super viewWillDisappear:YES];

    self.navigationController.navigationBarHidden = NO;

}