Removing viewcontrollers from navigation stack

Question

I have a navigation stack  with say 5 UIViewControllers  I want to remove the 3rd and 4th viewcontrollers in the stack on the click of a button in the 5th viewcontroller  Is it possible to do this  If so how

User · Answer

removing the viewcontrollers by class names from stack and then dismissing the current view   self navigationController  viewControllers removeAll where     vc  - gt  Bool in       if vc isKind of  ViewController self     vc isKind of  ViewController2 self                    return true                 else                     return false                       self navigationController  popViewController animated  false  self dismiss animated  true  completion  nil

User · Answer

Swift 3  amp  4 5  self navigationController  viewControllers removeAll    self navigationController  viewControllers remove at   insert here a number    Swift 2 1  remove all       self navigationController  viewControllers removeAll    remove at index  self navigationController  viewControllers removeAtIndex  insert here a number    There a bunch of more possible actions like removeFirst range etc

User · Answer

Swift 5 1  Xcode 11   extension UINavigationController  public func removePreviousController total  Int       let totalViewControllers   self viewControllers count     self viewControllers removeSubrange totalViewControllers-total   lt totalViewControllers - 1       Make sure to call this utility function after viewDidDisappear   of previous controller or viewDidAppear   of new controller

User · Answer

I wrote an extension with method which removes all controllers between root and top, unless specified otherwise.

extension UINavigationController {
func removeControllers(between start: UIViewController?, end: UIViewController?) {
    guard viewControllers.count > 1 else { return }
    let startIndex: Int
    if let start = start {
        guard let index = viewControllers.index(of: start) else {
            return
        }
        startIndex = index
    } else {
        startIndex = 0
    }

    let endIndex: Int
    if let end = end {
        guard let index = viewControllers.index(of: end) else {
            return
        }
        endIndex = index
    } else {
        endIndex = viewControllers.count - 1
    }
    let range = startIndex + 1 ..< endIndex
    viewControllers.removeSubrange(range)
}

}

If you want to use range (for example: 2 to 5) you can just use

    let range = 2 ..< 5
    viewControllers.removeSubrange(range)

Tested on iOS 12.2, Swift 5

User · Answer

Use this  if let navVCsCount   navigationController  viewControllers count       navigationController  viewControllers removeSubrange Range 2   lt navVCsCount - 1       It will take care of ViewControllers of navigationController  viewControllers and also a navigationItems stacked in navigationBar   Note  Be sure to call it at least after viewDidAppear

User · Answer

Swift 5   navigationController  viewControllers removeAll where     vc  - gt  Bool in     if vc isKind of  MyViewController self     vc isKind of  MyViewController2 self            return false       else           return true

User · Answer

Use this code and enjoy  NSMutableArray  navigationArray     NSMutableArray alloc  initWithArray  self navigationController viewControllers        navigationArray removeAllObjects         This is just for remove all view controller from navigation stack   navigationArray removeObjectAtIndex  2       You can pass your index here self navigationController viewControllers   navigationArray   navigationArray release    Hope this will help you  Edit  Swift Code guard let navigationController   self navigationController else   return   var navigationArray   navigationController viewControllers    To get all UIViewController stack as Array navigationArray remove at  navigationArray count - 2     To remove previous UIViewController self navigationController  viewControllers   navigationArray  Edit  To remove all ViewController except last one - gt  no Back Button in the upper left corner guard let navigationController   self navigationController else   return   var navigationArray   navigationController viewControllers    To get all UIViewController stack as Array let temp   navigationArray last navigationArray removeAll   navigationArray append temp     To remove all previous UIViewController except the last one self navigationController  viewControllers   navigationArray

User · Answer

This solution worked for me in swift 4   let VCCount   self navigationController  viewControllers count self navigationController  viewControllers removeSubrange Range VCCount-3   lt VCCount - 1     your current view controller index in stack is   self navigationController  viewControllers count - 1

User · Answer

You can first get all the view controllers in the array and then after checking with the corresponding view controller class, you can delete the one you want.

Here is small piece of code:

NSArray* tempVCA = [self.navigationController viewControllers];

for(UIViewController *tempVC in tempVCA)
{
    if([tempVC isKindOfClass:[urViewControllerClass class]])
    {
        [tempVC removeFromParentViewController];
    }
}

I think this will make your work easier.

User · Answer

Using setViewControllers function from UINavigationController is the best way  There is also animated parameter to enable animation   func setViewControllers   viewControllers   UIViewController   animated  Bool    Example in swift for question   func goToFifthVC          var currentVCStack   self navigationController  viewControllers     currentVCStack  removeSubrange 2   3       let fifthVC   UIStoryboard name   Main   bundle  nil  instantiateViewController withIdentifier   fifthVC       currentVCStack  append fifthVC       self navigationController  setViewControllers currentVCStack   animated  true      I tried other ways like  tempVC removeFromParentViewController    It make weird behaviour  removed ViewController navigation still showing when pop back like reported by  robin-ellerkmann

User · Answer

Details   Swift 5 1  Xcode 11 3 1   Solution  extension UIViewController       func removeFromNavigationController     navigationController  removeController  last    self     0        extension UINavigationController       enum ViewControllerPosition   case first  last       enum ViewControllersGroupPosition   case first  last  all        func removeController   position  ViewControllerPosition  animated  Bool   true                            where closure   UIViewController  - gt  Bool            var index  Int          switch position               case  first  index   viewControllers firstIndex where  closure              case  last  index   viewControllers lastIndex where  closure                    if let index   index   removeControllers animated  animated  in  Range index   index                func removeControllers   position  ViewControllersGroupPosition  animated  Bool   true                             where closure   UIViewController  - gt  Bool            var range  Range lt Int gt           switch position               case  first  range   viewControllers firstRange where  closure              case  last                  guard let  range   viewControllers reversed   firstRange where  closure  else   return                   let count   viewControllers count - 1                 range    init uncheckedBounds   lower  count -  range min     upper  count -  range max                  case  all                  let viewControllers   self viewControllers filter    closure  0                    setViewControllers viewControllers  animated  animated                  return                   if let range   range   removeControllers animated  animated  in  range               func removeControllers animated  Bool   true  in range  Range lt Int gt             var viewControllers   self viewControllers         viewControllers removeSubrange range          setViewControllers viewControllers  animated  animated             func removeControllers animated  Bool   true  in range  ClosedRange lt Int gt             removeControllers animated  animated  in  Range range            private extension Array       func firstRange where closure   Element  - gt  Bool  - gt  Range lt Int gt             guard var index   firstIndex where  closure  else   return nil           var indexes    Int            while index  lt  count  amp  amp  closure self index                 indexes append index              index    1                   if indexes isEmpty   return nil           return Range lt Int gt  indexes min      indexes max               Usage  removeFromParent    navigationController  removeControllers in  1   3   navigationController  removeController  first     0    self    navigationController  removeController  last     0    self    navigationController  removeControllers  all     0 isKind of  ViewController self     navigationController  removeControllers  first      0 isKind of  ViewController self     navigationController  removeControllers  last     0    self     Full Sample     Do not forget to paste here the solution code   import UIKit  class ViewController2  ViewController     class ViewController  UIViewController        private var tag  Int   0     deinit   print       DEINITED    self   tag    tag            override func viewDidLoad             super viewDidLoad           print       INITED    self            let stackView   UIStackView           stackView axis    vertical         view addSubview stackView          stackView translatesAutoresizingMaskIntoConstraints   false         stackView centerYAnchor constraint equalTo  view centerYAnchor  isActive   true         stackView centerXAnchor constraint equalTo  view centerXAnchor  isActive   true          stackView addArrangedSubview createButton text   Push ViewController   white   selector   selector pushWhiteViewController            stackView addArrangedSubview createButton text   Push ViewController   gray   selector   selector pushGrayViewController            stackView addArrangedSubview createButton text   Push ViewController2   green   selector   selector pushController2            stackView addArrangedSubview createButton text   Push  amp  remove previous VC   selector   selector pushViewControllerAndRemovePrevious            stackView addArrangedSubview createButton text   Remove first gray VC   selector   selector dropFirstGrayViewController            stackView addArrangedSubview createButton text   Remove last gray VC   selector   selector dropLastGrayViewController            stackView addArrangedSubview createButton text   Remove all gray VCs   selector   selector removeAllGrayViewControllers            stackView addArrangedSubview createButton text   Remove all VCs exept Last   selector   selector removeAllViewControllersExeptLast            stackView addArrangedSubview createButton text   Remove all exept first and last VCs   selector   selector removeAllViewControllersExeptFirstAndLast            stackView addArrangedSubview createButton text   Remove all ViewController2     selector   selector removeAllViewControllers2            stackView addArrangedSubview createButton text   Remove first VCs where bg     gray   selector   selector dropFirstViewControllers            stackView addArrangedSubview createButton text   Remove last VCs where bg     gray   selector   selector dropLastViewControllers               override func viewWillAppear   animated  Bool            super viewWillAppear animated          if title  isEmpty    true   title    First               private func createButton text  String  selector  Selector  - gt  UIButton           let button   UIButton           button setTitle text  for   normal          button setTitleColor  blue  for   normal          button addTarget self  action  selector  for   touchUpInside          return button          extension ViewController        private func createViewController lt VC  ViewController gt  backgroundColor  UIColor    white  - gt  VC           let viewController   VC           let counter    navigationController  viewControllers count    -1     1         viewController tag   counter         viewController title    Controller   counter           viewController view backgroundColor   backgroundColor         return viewController             objc func pushWhiteViewController             navigationController  pushViewController createViewController    animated  true              objc func pushGrayViewController             navigationController  pushViewController createViewController backgroundColor   lightGray   animated  true              objc func pushController2             navigationController  pushViewController createViewController backgroundColor   green  as ViewController2  animated  true              objc func pushViewControllerAndRemovePrevious             navigationController  pushViewController createViewController    animated  true          removeFromNavigationController               objc func removeAllGrayViewControllers             navigationController  removeControllers  all     0 view backgroundColor     lightGray               objc func removeAllViewControllersExeptLast             navigationController  removeControllers  all     0    self               objc func removeAllViewControllersExeptFirstAndLast             guard let navigationController   navigationController  navigationController viewControllers count  gt  1 else   return           let lastIndex   navigationController viewControllers count - 1         navigationController removeControllers in  1   lt lastIndex              objc func removeAllViewControllers2             navigationController  removeControllers  all     0 isKind of  ViewController2 self                objc func dropFirstViewControllers             navigationController  removeControllers  first     0 view backgroundColor     lightGray               objc func dropLastViewControllers             navigationController  removeControllers  last     0 view backgroundColor     lightGray               objc func dropFirstGrayViewController             navigationController  removeController  first     0 view backgroundColor     lightGray               objc func dropLastGrayViewController             navigationController  removeController  last     0 view backgroundColor     lightGray             Result

User · Answer

Swift 5  Xcode 11 3  I found this approach simple by specifying which view controller s  you want to remove from the navigation stack   extension UINavigationController        func removeViewController   controller  UIViewController Type            if let viewController   viewControllers first where     0 isKind of  controller self                   viewController removeFromParent                       Example use   navigationController removeViewController YourViewController self

User · Answer

If you are trying to move to 2nd view controller from 5th view controller (skipping 3rd and 4th), you would like to use [self.navigationController popToviewController:secondViewController].

You can obtain the secondViewController from the navigation controller stack.

secondViewController =  [self.navigationController.viewControllers objectAtIndex:yourViewControllerIndex];

User · Answer

Swift 2 0     var navArray Array    self navigationController  viewControllers     navArray removeAtIndex navArray count-2    self navigationController  viewControllers   navArray

[iphone] Removing viewcontrollers from navigation stack

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