swift trace “unexpectedly found nil” to the source

Question

Is there a way to find out which object is Nil? I get these errors from time to time while coding and normally I have no trouble finding them because I test my code frequent

Answer 1

That's what the Debug navigator is for. It shows the entire stack trace. And it is interactive: click a line of the call stack and you are taken to the line of code, at that level of the stack trace, where the problem is.