undefine key

[imran4118]

reason: '[<UITabBarItem 0x170149e20> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key animation.'

I implement 5 points exactly as you mention also watch your video not sure where i am wrong.

[jonah-neugass-ck]

I had the same issue. If you look at the console logs, it looked like my storyboard couldn't find the RAmotion class files. I created a new storyboard and it fixed that issue, but still crashing elsewhere.

[Bitxman]

I have the same problem.It looks like storyboard couldn't find any framework's classes.
logs:
2015-07-30 23:44:43.950 dada[5851:1927517] Unknown class RAMAnimatedTabBarItem in Interface Builder file.
'NSUnknownKeyException', reason: '[<UITabBarItem 0x174147f30> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key animation.'

[GavinThompson]

Also having this problem with a brand new project - swift 1.2 & XCode 6.4.

When I uncouple the animation outlets the errors disappear, but following the demo video always leads to the same error:

2015-09-09 10:55:18.695 LuckProject[9394:417826] Unknown class RAMAnimatedTabBarController in Interface Builder file.
2015-09-09 10:55:18.737 LuckProject[9394:417826] *** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UITabBarItem 0x7fa0e9f54200> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key animation.'
*** First throw call stack:... etc

[GavinThompson]

Just an update -- this stackoverflow answer actually helped:

http://stackoverflow.com/a/24924967

Had never encountered this before, or maybe I just always hit enter by reflex until today.

Edit: The supporting comments on this answer were also incredibly helpful