Upvote:2
Aprove answer
Something is doing a setValue:<some object> forKey:@"gridView" - probably Interface Builder has a view set to that, but that property is no longer in your .m file.
Failing that, do a global search on your project and find all occurrences of gridView, and add an assert in front of each that the object receiving that message has a property gridView.
Credit Goes to: stackoverflow.com
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