Xcode - Terminating with uncaught exception of type NSException when a button is pressed

Question

I\'m new to app development and I\'m following Apple\'s tutorial to learn. I\'ve looked through a lot of questions asked about this type of error but none of them are helpin

Answer 1

You're missing the ":" in the selector, try the following instead:

button.addTarget(self, action: "ratingButtonTapped:", forControlEvents: .TouchDown)

I hope this help you.

Answer 2

For reference, I've decided to have a look at the sample and got a similar issue.

I'm using XCode 8 + Swift 3 and these are my changes in order to get it working:

button.addTarget(self, action: #selector(RatingControl.ratingButtonTapped), for: .touchDown)

Note: considering the file name "RatingControl.swift".

I hope it help =D

Answer 3

I had the same problem, Check the version of your Xcode.

#selector comes with Xcode 7.3

If you have an older version update and this will probably fix your errors.

Regards, Driss

Answer 4

If you're using Swift 3, the line in question would have to be changed to:

button.addTarget(self, action: #selector(StarRatingControl.ratingButtonTapped), for: .touchDown)