How do you check current view controller class in Swift

Question

As far as I know  this would work in Objective-C   self window rootViewController class    myViewController   How can I check if the current view controller is a specific one

User · Answer

I had to find the current viewController in AppDelegate  I used this    at top of class var window UIWindow      inside my method function if let viewControllers   window  rootViewController  childViewControllers       for viewController in viewControllers           if viewController isKindOfClass MyViewControllerClass                println  Found it

User · Answer

To check the class in Swift  use  is   as explained under  checking Type  in the chapter called Type Casting in the Swift Programming Guide    if self window rootViewController is MyViewController         do something if it s an instance of that class

User · Answer

let viewControllers   navController  viewControllers         for aViewController in viewControllers                 if aViewController  isKind of   MyClass  classForCoder                          navController  popToViewController aViewController  animated  true

User · Answer

My suggestion is a variation on Kiran s answer above  I used this in a project   Swift 5     convenience property API on my class object to provide access to the my WindowController  MyController   var myXWindowController  MyController         var myWC  MyController                      for viewController in self windowControllers           if   viewController as  MyController     nil                myWC   viewController as  MyController             break                      return myWC       example of use guard let myController   myXWindowController else       reportAssertionFailure  Failed to get MyXController from WindowController        return

User · Answer

Swift 4  Swift 5  let viewController   UIApplication shared keyWindow  rootViewController if viewController is MyViewController

User · Answer

For types you can use is and if it is your own viewcontroller class then you need to use isKindOfClass like   let vcOnTop   self embeddedNav viewControllers self embeddedNav viewControllers count-1              if vcOnTop isKindOfClass VcShowDirections                   return

User · Answer

var top   window  rootViewController             while   top  presentedViewController     nil                    top   top  presentedViewController                                        if   type of  top       CallingVC self                    top  performSegue withIdentifier   quot CallingVC quot   sender  call

User · Answer

Updated for swift3 compiler throwing a fit around   and     if let wd   UIApplication shared delegate  window           var vc   wd  rootViewController         if vc is UINavigationController               vc    vc as  UINavigationController  visibleViewController                     if vc is LogInViewController                 your code

User · Answer

To go off of Thapa s answer  you need to cast to the viewcontroller class before using         if let wd   self view window           var vc   wd rootViewController          if vc is UINavigationController               vc    vc as  UINavigationController  visibleViewController                   if vc is customViewController               var viewController   customViewController   vc as  customViewController

User · Answer

Swift 3   Check if a view controller is the root from within itself   You can access window from within a view controller  you just need to use self view window   Context  I need to update the position of a view and trigger an animation when the device is rotated  I only want to do this if the view controller is active   class MyViewController  UIViewController        override func viewDidLoad             super viewDidLoad            NotificationCenter default addObserver              self               selector   selector deviceDidRotate                name   UIApplicationDidChangeStatusBarOrientation               object  nil                      func deviceDidRotate             guard let window   self view window else   return               check if self is root view controller         if window rootViewController    self               print  vc is self                         check if root view controller is instance of MyViewController         if window rootViewController is MyViewController               print  vc is MyViewController                       If you rotate your device while MyViewController is active  you will see the above lines print to the console  If MyViewController is not active  you will not see them   If you re curious why I m using UIDeviceOrientationDidChange instead of  UIDeviceOrientationDidChange  look at this answer

User · Answer

You can easily iterate over your view controllers if you are using a navigation controller  And then you can check for the particular instance as  Swift 5  if let viewControllers   navigationController  viewControllers               for viewController in viewControllers                   if viewController isKind of  LoginViewController self

User · Answer

Swift 3  Not sure about you guys  but I m having a hard time with this one  I did something like this   if let window   UIApplication shared delegate  window       if var viewController   window  rootViewController              handle navigation controllers         if viewController is UINavigationController               viewController    viewController as  UINavigationController  visibleViewController                    print viewController            I kept getting the initial view controller of my app  For some reason it wanted to stay the root view controller no matter what  So I just made a global string type variable currentViewController and set its value myself in each viewDidLoad    All I needed was to tell which screen I was on  amp  this works perfectly for me

User · Answer

Check that way that worked better for me What is  self  if   self window rootViewController  isKind of  WebViewController self           code

User · Answer

Try this  if self is MyViewController

User · Answer

if let index   self navigationController  viewControllers index where     0 is MyViewController                  let vc   self navigationController  viewControllers vcIndex  as  MyViewController             self navigationController  popToViewController vc  animated  true            else               self navigationController  popToRootViewController animated  true

[ios] How do you check current view controller class in Swift?

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