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

A swift version with some additions based on this comment

func dismissModalStack(viewController: UIViewController, animated: Bool, completionBlock: BasicBlock?) {
    if viewController.presentingViewController != nil {
        var vc = viewController.presentingViewController!
        while (vc.presentingViewController != nil) {
            vc = vc.presentingViewController!;
        }
        vc.dismissViewControllerAnimated(animated, completion: nil)

        if let c = completionBlock {
            c()
        }
    }
}

Answer 2

[[self presentingViewController]presentingViewController]dismissModalViewControllerAnimated:NO];

You can also implement a delegate in all controllers you want to dismiss

Answer 3

Try this..

ThirdViewController *tvc = [[ThirdViewController alloc] initWithNibName:@"ThirdViewController" bundle:nil];
[self.view addsubview:tvc];    
[tvc release];

Answer 4

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.