iOS 7 - Failing to instantiate default view controller

Question

I am using Xcode 5 in a newly created app and when I just create it I go for the run button e click on it  then the project gets built but it does not show in the iOS Simulator and I get the following message    Failed to instantiate the default view controller for UIMainStoryboardFile  Main  -   perhaps the designated entry point is not set    I ve Googled about it of course and everybody points out that this is happening because XCode does not know yet which view controller is the initial one  But the weird thing is that I created the app as a page based  also tried single-view and tabbed app options  app and XCode already had defined a Storyboard for it   Also  when I go to the main interface option of the project the storyboard  named  Main  by Xcode itself  is set  and in the Storyboard  my view controller is set as the  Initial View Controller     What is wrong

User · Answer

If you have been committing your code to source control regularly, this may save you the hassle of creating a new Storyboard and possibly introducing more problems...

I was able to solve this by comparing the Git source code of the version that worked against the broken one. The diff showed that the first line should contain the Id of the initial view controller, in my case, initialViewController="Q7U-eo-vxw". I searched through the source code to be sure that the id existed. All I had to do was put it back and everything worked again!

<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="5056" systemVersion="13E28" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" initialViewController="Q7U-eo-vxw">
    <dependencies>
        <deployment defaultVersion="1296" identifier="iOS"/>
        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="3733"/>
    </dependencies>
    <scenes>

Here are some steps that can help you troubleshoot:

Right click the failing Storyboard and use Source Control > Commit... to preserve your changes since the last commit.
Try right clicking your failing Storyboard and use "Open As > Source Code" to view the XML of the storyboard.
In the document element, look for the attribute named "initialViewController". If it is missing, don't worry, we'll fix that. If it is there, double click the id that is assigned to it, command-c to copy it, command-f command-v to search for it deeper in the document. This is the identifier of the controller that should provide the initial view. If it is not defined in the document then that is a problem - you should remove it from the document tag, in my case initialViewController="Q7U-eo-vxw".
Go to Xcode menu item called View and choose Version Editor > Show Comparison View
This shows your local version on the left and the historical version on the right. Click on the date beneath the historical version to get a list of the commits for this story board. Choose one that you know worked and compare the document element. What is the id of the *initialViewController? Is it different? If so, try editing it back in by hand and running.

User · Answer

Check if you have the window var in the AppDelegate    var window  UIWindow     And also check the storyboard of your Info plist file     lt key gt UIMainStoryboardFile lt  key gt   lt string gt Main lt  string gt    Programmatically setting the rootViewController in the AppDelegate is not going to fix the warning  You should choose whether to let to the storyboard set the view controller or do it programmatically

User · Answer

Apart from above correct answer  also make sure that you have set correct Main Interface in General

User · Answer

Using Interface Builder    Check if  Is initial view controller  is set  You can set it using below steps     Select your view controller  which is to be appeared as initial screen   Select Attribute inspector from Utilities window  Select  Is Initial View Controller  from View Controller section  if not     If you have done this step and still getting error then uncheck and do it again     Using programmatically    Objective-C            self window     UIWindow alloc  initWithFrame UIScreen mainScreen bounds           UIStoryboard  storyboard    UIStoryboard storyboardWithName   MainStoryboard  bundle nil            UIViewController  viewController    storyboard instantiateViewControllerWithIdentifier   HomeViewController        lt storyboard id gt           self window rootViewController   viewController           self window makeKeyAndVisible            return YES    Swift            self window   UIWindow frame  UIScreen mainScreen   bounds          let mainStoryboard  UIStoryboard   UIStoryboard name   Main   bundle  nil           var objMainViewController  MainViewController   mainStoryboard instantiateViewControllerWithIdentifier  MainController   as  MainViewController          self window  rootViewController   objMainViewController          self window  makeKeyAndVisible            return true

User · Answer

So this also happened to me too  I checked 50 times and my  Is Initial View Controller  was checked  believe me  It happened out of the blue  So how did I fix it     Create a new Storyboard in your project  name it something like Main iPhoneV2  or iPadV2 depending on your original storyboard style  Open the broken storyboard  click anywhere in the white area and press command-a  then command-c  select all and copy  Open your new storyboard and press command-v to paste the same exact setup Go to your project settings  change your  Main Interface  to the new Main iPhoneV2  If it s your iPad and you re writing a universal app  you ll have to edit the -Info plist and look for the value  Main storyboard file base name  iPad  Recompile  and stop pulling your hair out

User · Answer

Check Is Initial View Controller in the Attributes Inspector

User · Answer

If you added new storyboard then you have to check following points   1  In your plist file check value of Main storyboard file base name  iPad  or  iPhone  should be matched with your storyboard file name  do not add extension  storyboard   2  In storyboard there should be one view controller which set as Is initial view controller  3  Clean and build your project

User · Answer

Projects created in Xcode 11 and above  simply changing the Main Interface file from the project settings won t be enough   You have to manually edit the Info plist file and set the storyboard name for the UISceneStoryboardFile as well

User · Answer

I have experienced this with my Tab Bar Controller not appearing in the Simulator along with a black screen  I did the following in order for my app to appear in the Simulator   Go to Main storyboard  Check the Is Initial View Controller under the Attributes inspector tab    If you accidentally deleted that view controller  or otherwise made it not the default  then you   ll see the error    Failed to instantiate the default view controller for UIMainStoryboardFile  Main  - perhaps the designated entry point is not set     when your app launches  along with a plain black screen  To fix the problem  open your Main storyboard file and find whichever view controller you want to be shown when your app first runs  When it   s selected  go to the attributes inspector and check the box marked    Is Initial View Controller     You should see a right-facing arrow appear to the left of that view controller  showing that it   s your storyboard   s entry point

User · Answer

1st option  if you want to set your custom storyboard instead of a default view controller   Change this attribute from info plist file   lt key gt UISceneStoryboardFile lt  key gt   lt string gt Onboarding lt  string gt   Onboarding would be your storyboard name  to open this right-click on info plist file and open as a source code  2nd option  1- Click on your project   2- Select your project from the target section  3- Move to Deployment interface section  4- Change your storyboard section from  Main Interface field     Please remember set your storyboard initial view controller

User · Answer

This warning is also reported if you have some code like       window   UIWindow frame  UIScreen mainScreen   bounds      window  rootViewController   myAwesomeRootViewController     window  makeKeyAndVisible     In this case  go to the first page of target settings and set Main Interface to empty  since you don t need a storyboard entry for your app

User · Answer

I get this error when I change the the storyboard file name  Main storyboard  TO   XXX storyboard   The solution for me was    Product- Clean CHANGE  Supporting Files -  info plist -  Main storyboard file base name -  Main TO  XXX   Good Luck

User · Answer

None of the above solved the issue for me  In my case it was not also setting the correct application scene manifest  I had to change LoginScreen used to be Main

User · Answer

Product  Clean  was the solution for me

User · Answer

First click on the View Controller in the right hand side Utilities bar  Next select the Attributes Inspector and make sure that under the View Controller section the  Is Initial View Controller  checkbox is checked

User · Answer

Setup the window manually   -  void applicationDidBecomeActive  UIApplication   application       if   application keyWindow rootViewController                  UIStoryboard  storyboard    UIStoryboard storyboardWithName   MainStoryboard  bundle nil            UIViewController  myViewController   storyboard instantiateViewControllerWithIdentifier   myViewController identifier              application keyWindow rootViewController   myViewController

[ios] iOS 7 - Failing to instantiate default view controller

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