iPhone - dismiss multiple ViewControllers

Question

I have a long View Controllers hierarchy;

in the first View Controller I use this code:

SecondViewController *svc = [[SecondViewController alloc] i         


        

Answer 1

Swift 3 extension based upon the above answers.

Principle for a stack like that : A -> B -> C -> D

• Take a snapshot of D
• Add this snapshot on B
• Dismiss from B without animation

• On completion, dismiss from A with animation

  extension UIViewController {
  
      func dismissModalStack(animated: Bool, completion: (() -> Void)?) {
          let fullscreenSnapshot = UIApplication.shared.delegate?.window??.snapshotView(afterScreenUpdates: false)
          if !isBeingDismissed {
              var rootVc = presentingViewController
              while rootVc?.presentingViewController != nil {
                  rootVc = rootVc?.presentingViewController
              }
              let secondToLastVc = rootVc?.presentedViewController
              if fullscreenSnapshot != nil {
                  secondToLastVc?.view.addSubview(fullscreenSnapshot!)
              }
              secondToLastVc?.dismiss(animated: false, completion: {
                  rootVc?.dismiss(animated: true, completion: completion)
              })
          }
      }
  }
  

A little flickering on simulator but not on device.