NSUnknownKeyException setValue:forUndefinedKey: [duplicate]

Answer 1

Quit the iOS simulator. Make sure you save the project and then quit xCode and restart and everything will be fine. I did that and it worked for me. that's if everything else is hooked up correctly.

Answer 2

Set File's Owner class to NSObject and set UITableViewCell class to your custom class in XIB. It will solve the issue.

Answer 3

Check your references of your outlets in your XIB, one of them is probably referencing a property (buttonOfFirstView) that does not exist anymore

Answer 4

This is exactly an issue related to the key buttonOfFirstView in your case.If it is a button it may be connected wrongly in any of your xibs

Answer 5

you need to clean your project: go to Product -> Clean

this works for me