I'm trying to call Objective-C code from Swift. I created a Swift Bridging Header, and added an import to the Objective-C file (e.g. #import "UIColor+Utils.h").
The project builds, and I even get code completion, but when it attempts to execute that line of code, it crashes and says unrecognized selector sent to class.
What did I do wrong?
(Xcode 6.2, iOS 8.2)
This is caused when you attempt to call an extension method from a file which is included in the bridging header, but isn't added to the proper target.
To fix this, ensure that the file is a member of the same target as the one that is currently running.
For example, if you are trying to call Objective-C code (e.g. UIColor+Utils.m) from your WatchKit Extension, then the .m file (e.g. UIColor+Utils.m) must have the WatchKit Extension in its Target Membership section.
For more information, see below.
If you include the .h file in the Bridging-Header.h file, but forget to add the file to the target, you will get the following behavior.
If you attempt to call a method on your own class (e.g. ABCClass.doSomething()):
Undefined symbols for architecture x86_64.If you attempt to call a class extension method (e.g. UIColor.doSomething()):
unrecognized selector sent to class.
With xCode 8, when you add a file, make sure you choose the correct target from 'options'. I was choosing a folder and adding it directly to my project but somehow that was not setting the correct target.
