iOS 中，推出下一个页面隐藏navigataionBar，

rootVC中设置

-(void)viewWillAppear:(BOOL)animated{

    //

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

}

 

childrenVC中设置

-(void)viewWillAppear:(BOOL)animated{

    //

    [self.navigationController setNavigationBarHidden:no animated:YES];

}