this class is not key value coding-compliant for the key XXXXXX

by

Can’t be sure if this is what’s happening in your case, but you’ll commonly see this message if you have a connection set up in your nibs to assign an object to a property of another object, but the property is missing on the target object.

So you might have had an IBOutlet named aproposViewController on LoadingViewController at one point, connected another view controller to it in the nib, and then removed the IBOutlet but neglected to remove the connection in the nib.

So when the nib is loaded, it tries to set the property, only to find it doesn’t exist, hence:

reason: '[<LoadingViewController 0x6b2c5a0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key aproposViewController.'

More Related Contents:

  1. How to find topmost view controller on iOS
  2. Xcode 6 Bug: Unknown class in Interface Builder file
  3. Get to UIViewController from UIView?
  4. Explaining difference between automaticallyAdjustsScrollViewInsets, extendedLayoutIncludesOpaqueBars, edgesForExtendedLayout in iOS7
  5. How to tell if UIViewController’s view is visible
  6. How to use Auto Layout to move other views when a view is hidden?
  7. UIViewController returns invalid frame?
  8. Is it possible to set UIView border properties from interface builder?
  9. How to set Status Bar Style in Swift 3
  10. Popover with embedded navigation controller doesn’t respect size on back nav
  11. Unable to make outlet connection to a constraint in IB
  12. Present modal view controller in half size parent controller
  13. Xcode 9 – “Fixed Width Constraints May Cause Clipping” and Other Localization Warnings
  14. Programmatically change rootViewController of storyBoard
  15. Custom Font Sizing in Xcode 6 Size Classes not working properly with Custom Fonts
  16. Changing VC issue in Swift. How to pass data between views in tab bar controller?
  17. How to push and present to UIViewController programmatically without segue in iOS Swift 3
  18. What does addChildViewController actually do?
  19. single function to dismiss all open view controllers
  20. Can I use autolayout to provide different constraints for landscape and portrait orientations?
  21. IOS7 Status bar hide/show on select controllers
  22. Why can’t I call the default super.init() on UIViewController in Swift?
  23. iOS Nested View Controllers view inside UIViewController’s view?
  24. Design UITableView’s section header in Interface Builder
  25. Can’t Load UIViewController XIB file in Storyboard in Swift
  26. Swift: Navigate to new ViewController using button
  27. Making a button persistent across all view controllers
  28. Xcode changes unmodified storyboard and XIB files
  29. What are the benefits of using Storyboards instead of xib files in iOS programming?
  30. difference between presentViewController and UINavigationController?

Leave a Comment