Failed to instantiate the default view controller for UIMainStoryboardFile 'Main' - perhaps the designated entry point is not set?

user_413570 0
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I am using Xcode in a newly created app and when I run the project 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"

Is Initial View Controller

What is wrong?

xcode5 xcode objective-c iphone ios
18 Answers

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.

  1. Go to Main.storyboard.
  2. Check the Is Initial View Controller under the Attributes inspector tab.

Is Initial View Controller in the Attributes Inspector.

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_55548860

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

enter image description here

user_82726980

1st option

if you want to set your custom storyboard instead of a default view controller.

Change this attribute from info.plist file

<key>UISceneStoryboardFile</key> <string>Onboarding</string>

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_63794700

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_10777890

Check if you have the window var in the AppDelegate. 

var window: UIWindow?

And also check the storyboard of your Info.plist file. 

<key>UIMainStoryboardFile</key>
<string>Main</string>

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_22110190

If you have scene delegate you have to check in info.plist

<key>UIApplicationSceneManifest</key>
    <dict>
        <key>UIApplicationSupportsMultipleScenes</key>
        <false/>
        <key>UISceneConfigurations</key>
        <dict>
            <key>UIWindowSceneSessionRoleApplication</key>
            <array>
                <dict>
                    <key>UISceneConfigurationName</key>
                    <string>Default Configuration</string>
                    <key>UISceneDelegateClassName</key>
                    <string>$(PRODUCT_MODULE_NAME).SceneDelegate</string>
                    <key>UISceneStoryboardFile</key>
                    <string>Login</string>
                </dict>
            </array>
        </dict>
    </dict>

I'm here loading my storyboard called Login.storyboard

plist

user_114795610

If you've created a new Storyboard with a name other than "Main" there will be some problems, but it's easy to adjust...

So after you've created a new Storyboard with the desired name and you want to use it as the main story, do the following:

  1. Check box 'Is Initial View Controller' inside Attributes Inspector: 1
  2. Choose desired storyboard as 'Main Interface' for your target: 2
  3. Open project Info.plist and find a property 'Storyboard Name' where you should type your desired Storyboard name as value 3
user_42889570
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