Warning -Presenting view controllers on detached view controllers is discouraged

Question

In my app  I am using a navigation controller  Later on in some view I am using presentViewController for showing a zoomed image  Also I am not using a Storyboard or nib    I am getting this error in iOS 7 only  It works fine in iOS 6 and earlier      Presenting view controllers on detached view controllers is   discouraged

User · Answer

Make sure you have a root view controller to start with  You can set it in didFinishLaunchingWithOptions   -  BOOL application  UIApplication   application didFinishLaunchingWithOptions  NSDictionary   launchOptions            window setRootViewController viewController

User · Answer

Many answers are right    Check your presentingViewController have parentViewController or not   If no  add it to somewhere it should be added else  check it s parentViewController has parentViewController recursively until every viewController has parent   This issue happened to me when my co-worker add a AViewController to BViewController  Somehow  he just add the AViewController s view to BViewController s view   Fixed by add bViewController addChild aViewController

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In my case  I ve a sampleViewController s view added as a subview  then tries to present a popover from the view of sampleViewController  here self instead a UIViewController instance     self view addSubview sampleViewController view     The right way should be below      make sure the vc has been added as a child view controller as well  self addChildViewController sampleViewController    self view addSubview sampleViewController view    sampleViewController didMoveToParentViewController self       B t w   this also works for the case that present a popover form a tableview cell  you just need to make sure the tableview controller has been added as child view controller as well

User · Answer

Swift 3  For anyone stumbling on this  here is the swift answer   self parent  present viewController  animated  true  completion  nil

User · Answer

It depends if you want to show your alert or something similar in anywhere of kind UIViewController   You can use this code example   UIAlertController  alert    UIAlertController alertControllerWithTitle   Alert  message   Example  preferredStyle UIAlertControllerStyleAlert    UIAlertAction  cancelAction    UIAlertAction actionWithTitle   Cancel  style UIAlertActionStyleDefault handler nil     alert addAction cancelAction          UIApplication sharedApplication  delegate  window  rootViewController  presentViewController alert animated true completion nil

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In Swift 4 1 and Xcode 9 4 1  The solution is   DispatchQueue main async execute        self present alert  animated  true       If write like this i m getting same error  let alert   UIAlertController title   title   message   message   preferredStyle   alert  let defaultAction   UIAlertAction title   OK   style   default  handler    action in        alert addAction defaultAction   present alert  animated  true  completion  nil     I m getting same error  Presenting view controllers on detached view controllers is discouraged  lt MyAppName ViewController  0x7fa95560Z070 gt     Complete solution is   let alert   UIAlertController title   title   message   message   preferredStyle   alert  let defaultAction   UIAlertAction title   OK   style   default  handler    action in         alert addAction defaultAction    Made Changes here     DispatchQueue main async execute        self present alert  animated  true

User · Answer

you need to add the view controller that will present the new controller as a child of the parent view controller   Let s say you have yourMainViewController  then you add a new controller called controllerA  and then you want to present a new controller called controllerB from controllerA  you have to write something like this    self addChildViewController controllerA     self is yourMainViewController  self view addsubView controllerA view      and within controllerA you can present the new controller without warnings   self presentViewController controllerB animated YES completion nil     self is controllerA

User · Answer

Try presenting on TabBarController if it is a TabBarController based app      self tabBarController presentViewController viewController animated YES completion nil     Reason could be self is child of TabBarController and you are trying to present from a ChildViewController

User · Answer

Wait for viewDidAppear     This error can also arise if you are trying to present view controller before view actually did appear  for example presenting view in viewWillAppear   or earlier  Try to present another view after viewDidAppear   or inside of it

User · Answer

Try this code  UINavigationController  navigationController     UINavigationController alloc  initWithRootViewController  lt your ViewController object gt      self view window rootViewController presentViewController navigationController animated YES completion nil

User · Answer

Yes  I also faced the same warning message while displaying an Alert controller which was in another view  Later on I avoided this by presenting the alert controller from the parent view controller as below    self parentViewController presentViewController alertController animated YES completion nil

User · Answer

I have almost the same problem  The reason was that I tried to present  some  controller on another and after animation was completed I was setting presented controller as root  After this operation all further controllers presenting bring me to the warning   Presenting view controllers on detached view controllers is discouraged   And I solve this warning just settings  some  controller as root without any presentation at the begin   Removed     self rootController  presentViewController controller animated YES completion             self window  rootViewController   controller            self window  makeKeyAndVisible        Just make as root without any presentation      self window  setRootViewController controller

User · Answer

Lots of reasons for this warning  Mine is because I have a segue connected from a ViewController to another that will be presented modally  But  the ViewController I am presenting from is being dynamically generated by a PageViewController  Which is why it is detached in the Storyboard  My app isn t going to crash because of it  but I would like to silence the warning

User · Answer

I think that the problem is that you do not have a proper view controller hierarchy  Set the rootviewcontroller of the app and then show new views by pushing or presenting new view controllers on them  Let each view controller manage their views  Only container view controllers  like the tabbarviewcontroller  should ever add other view controllers views to their own views  Read the view controllers programming guide to learn more on how to use view controllers properly  https   developer apple com library content featuredarticles ViewControllerPGforiPhoneOS

User · Answer

To avoid getting the warning in a push navigation  you can directly use     self view window rootViewController presentViewController viewController animated YES completion nil     And then in your modal view controller  when everything is finished  you can just call      self dismissViewControllerAnimated YES completion nil

User · Answer

Use  self navigationController presentViewController xxx animated YES completion nil  in iOS 8

User · Answer

I reached on this thread where I have a Custom Navigation Bar and I was calling an AlertViewController through it   I had to add it as a child to my main view controller  Then I could call present it without any warning   You should add your Zoomed Image View Controller as a child of the main ViewController    e g     self addChildViewController ZoomedImageViewController     Then you d be able to call your ZoomedImageViewController    self presentViewController ZoomedImageViewController

User · Answer

One of the solution to this is if you have childviewcontroller So you simply presentviewcontroller on its parent by given    self parentViewController presentViewController viewController animated YES completion nil     And for dismiss use the same dismissview controller    self dismissViewControllerAnimated YES completion nil     This is perfect solution works for me

User · Answer

The reason of this warning is i was presenting a view controller over a small view that is not full size view  Given below is the image of my project  where on click on four option above  User navigate to different childviewcontroller s view  it works like tabViewcontroller   But the childviewcontroller contains view of small size  So if we present a view from childviewcontroller it gives this warning      And to avoid this  you can present a view on childviewcontroller s parent     self parentViewController presentViewController viewController animated YES completion nil

[ios] Warning :-Presenting view controllers on detached view controllers is discouraged

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