Ios – “Could not find any information for class named ViewController”

iboutletiosxcode

This bug has been driving me nuts since I started using Xcode (4.6.3). Whenever I try to link a Storyboard item to my code, I get the error:

Could not find any information for class named ViewController.

This happens with custom classes as well. I've tried methods such as:

Deleting the delegate data.
Removing and re-adding the classes.
Restarting Xcode.
Reinstalling Xcode.

I can't ctrl-drag to create connections in any of my projects no matter what the class is. The same problem happens with a brand-new template application. If I type in the code manually and then ctrl-drag, I can make a working connection, but I can't add it automatically. Nothing I've been able to find so far on the Internet has helped. Any pointers?

Best Answer

What solved this issue for me was actually deleting the class from the project.

Steps:

In the project file explorer (left panel) find the class and right click -> Delete
Remove reference (do not move to trash as you will lose the class for good)
Right click on the folder that contained the class -> Add files to ...
Find the class you just deleted in the file system

This seems to force Xcode to link the class back into the storyboard.

Note: for me the following did not work:

Closing Xcode
Cleaning the project
Deleting the class name from the storyboard and re-entering it

I think this is a bug on Apple's part

You may have a bad connection in your xib.

I've had this error many times. While TechZen's answer is absolutely right in this case, another common cause is when you change the name of a IBOutlet property in your .h/.m which you've already connected up to File's Owner in the nib.

From your nib:

Select the object in IB and go to the 'Connections Inspector'.
Under 'Referencing Outlets' make sure that your object isn't still connected to the old property name... if it is, click the small 'x' to delete the reference and build again.

Another common cause if you are using Storyboard, your UIButton might have more then one assignings (Solution is almost the same as for nib):

Open your storyboard and right click the UIButton
You will see that there is more than one assign/ref to this button. Remove one of the "Main..." greyed windows with the small "x":

Ios – Storyboard – refer to ViewController in AppDelegate

Have a look at the documentation for -[UIStoryboard instantiateViewControllerWithIdentifier:]. This allows you to instantiate a view controller from your storyboard using the identifier that you set in the IB Attributes Inspector:

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EDITED to add example code:

UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"MainStoryboard"
                                                         bundle: nil];

MyViewController *controller = (MyViewController*)[mainStoryboard 
                    instantiateViewControllerWithIdentifier: @"<Controller ID>"];

Best Answer

Related Solutions

Ios – Xcode – How to fix ‘NSUnknownKeyException’, reason: … this class is not key value coding-compliant for the key X” error

You may have a bad connection in your xib.

Ios – Storyboard – refer to ViewController in AppDelegate

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