I am getting an "Implicit conversion from enumeration type" warning in Xcode for iOS and I don't know why

Question

With this code:

NSDataDetector *detector = [NSDataDetector dataDetectorWithTypes:NSTextCheckingTypeLink
                                                               error:&error];

I am getting this warning:

Implicit conversion from enumeration type 'enum NSTextCheckingType' to different enumeration type 'NSTextCheckingTypes' (aka 'enum NSTextCheckingTypes')

Can someone explain to me why I am getting this warning and how to fix it?

Answer 1

+dataDetectorWithTypes: does claim to take a value from the NSTextCheckingTypes enum rather than NSTextCheckingType, but going by the rest of its documentation it should indeed allow you to specify individual values from the latter enum. I would just add a cast to NSTextCheckingTypes. You might also want to file a bug on the API.