Question 72278 in IOS Swift Question posted in
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How can present view controller from specific view controller? – Ios swift

I’m starting a navigation flow. I’m starting from AViewController and I’m navigating in app. AViewController -> BViewController -> CViewController -> DViewController. While in DViewController, I want to push EViewController. But I want AViewController to do this push, not DViewController. So I want my presentingViewController to be AViewController. With this, other ViewControllers(BViewController, CViewController, DViewController) have to be dismissed. In the last case, my navigation flow should be like this: AViewController -> EViewController. Is there a way to do this ?

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4

Answers


  1. 0

    do you want eviewcontroller back to Aviewcontroller, or you can push Aviewcontroller to Eviewcontroller

     func pushFrom(vc: UIViewController.Type) {
    guard let nv = self.navigationController else {
      return
   }
  for controller in nv.viewControllers as Array {
    if controller.isKind(of: vc.self) {
let eviewcontroller = Eviewcontroller()
     controller.navigationController!.pushViewController(eviewcontroller, 
 animated: true)
        break
     }
  }
}

    Then

     pushFrom(vc: AViewcontroller.self)
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  2. 0

    You need to pop all the view controller till AViewcontroller as

    self.navigationController?.popToRootViewController(animated: true)

    Then

    self.navigationController?.pushViewController(EViewcontroller, animated: true)

    Now it is AViewcontroller -> EViewcontroller

    Another solution

    self.navigationController?.pushViewController(EViewcontroller, animated: true)

DispatchQueue.main.asyncAfter(deadline: .now() + 0.4) {
        self.navigationController?.viewControllers.remove(at: 1) // Remove B
        self.navigationController?.viewControllers.remove(at: 2) // Remove C
        self.navigationController?.viewControllers.remove(at: 3) // Remove D
}

    OR
    Add this in EViewcontroller’s viewDidAppear

    self.navigationController?.viewControllers.remove(at: 1) // Remove B
self.navigationController?.viewControllers.remove(at: 2) // Remove C
self.navigationController?.viewControllers.remove(at: 3) // Remove D
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  3. 0

    First , create a function that helps you to push A to F in Viewcontroller A

      func aToF(){
    let fVC= self.storyboard?.instantiateViewController(withIdentifier: "your vc Id") as! FViewController
   self.navigationController?.pushViewController(fVC, animated: false)
}

    And where you go back to root and push F call this :

      let turnBack = self.navigationController?.viewControllers[0] as! AViewController
  self.navigationController?.popToRootViewController(animated: false)
  turnBack.aToF()

    I do not recommend creating a new instance from an already memorized viewcontroller, but this is one of the easiest ways.

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  4. 0

    To replace the navigation stack of a view controller, use setViewControllers(_, animated:). If you pass in your existing AViewController and a new EViewController then your final navigation stack will be just those two.

    There is no need to manually rebuild the stack you want by pushing and popping individual controllers.

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