按下后退按钮时保存和还原UIViewcontroller

Question

I have two UIViewControllers . In first UIViewController I have a UITableView as a subview. When any one of the UITableViewCell is selected, a UIView (as a subview) will be displayed, which have 9 buttons. When any one of the button is pressed, Second UIViewController will be presented. When user press custom back button on second UIViewController , First UIViewController have to be presented with all previous selected UITableViewCell and corresponding subviews open. How to achieve this. Is there any process to save UIViewController's state at a desired time.

Any suggestion will be greatly appreciated.

Answer 1

If your are using a Navigation controller, navigating from one controller to another, your parent view controller will not be deallocated. Hence you can maintain state of that first view controller by means of properties or something else. When viewWillAppear is called for that controller, you can make use of that and update the controller accordingly.