Here are some things that can fix this (in increasing order of difficulty): Clean the project (Product > Clean) Manually paste in @IBOutlet weak var viewName: UIView! // or @IBAction func viewTapped(_ sender: Any) { } and control drag to it. (Change type as needed.) Also see this. Completely close Xcode and restart your project. … Read more
I was getting the same warnings even without multiple languages in my app, which led me to find out what was really going on. . . There are a few different things going on here. I was able to silence the fixed-width warnings in my own app by changing the width of the object spacings from fixed width to greater than … Read more
The View Identity – Class Identity was not set. After setting it to the appropriate class, the issue was resolved.
Your view controller may have the wrong class in your xib. I downloaded your project. The error you are getting is ‘NSUnknownKeyException’, reason: ‘[<UIViewController 0x3927310> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key string.’ It is caused by the Second view controller in MainWindow.xib having a class of UIViewController instead of SecondView. Changing to the correct class resolves the … Read more