iphone - "this class is not key value coding-compliant for the key...."

Question

for the past few days i keep on getting this error everytime i run a build in xCode:

Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIApplication 0x1dd4a1c0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key playBtn.'

at the begining it was in something i have made. than i deleted it and it was still there - in an object (like this playBtn here) that did not exist anymore.

and now - in every single app i am trying to debug. if on my iphone or in the simulator - the same.

i just can't run anything now !!

*clean doesn't work ! *

what do i do? i can't work like this..

notice: solved. it was a problem with the appdelegate.m thanks for who helped.

Answer 1

Check your IBOutlet connections in your XIB

You said playBtn does not exists, so check if connection still exist for the same, They will show ! mark in place of dot in connections.