import swift class in objective-c, -Swift.h file not found

Question

I have an iOS project written with Objective-C. I created an Swift class in the project, the bridging header file for accessing objective-c in Swift is generated successfull

Answer 1

Updated May 2018 Xcode 9.3

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1. Build Settings->Objective-C Generated Interface Header Name
   and set the value to YourModule-Swift.h (this is usually already set, this is the filename you need to import on .m file #import "YourModule-Swift.h"

(Example, Project named CData)

2. Same as Step 1, Go to Build Settings and search for "Defines Module", set both values to YES

3. Create a class that extends NSObject on .swift file

4. Build the project again

5. Import YourModule-Swift.h file on .m file (Please notice it's case sensitive, Mymodule !== MyModule)

Answer 2

OMG.. the actual import statement was not "class-Swift.h" but rather "projectname-Swift.h"

You can find the name of the file if you look under build settings->Swift Compiler Code Generation -> Objective-C Generated Interface Header Name

The file was not generated when I dragged in Swift source into the GUI. Only when I right-clicked->Add file to "project". It then asked to generate the header files.

Answer 3

For me the solution was to create a new target. For an unknown reason, the target that I had didn't have that "Swift Compiler - General" settings and thus no to "Objective-C Generated Interface Header Name" field. Having that field specified in the project was not enough.

Answer 4

My addition to Daniel Kroms answer:

• Never add -Swift.h Header to header. Even if it seems to work. Add the Import to .m file only!

• In case you use in your header swift classes, make a forward declaration with @class swiftclassname before your @interface

Then you will see your real errors in your code.

Answer 5

For me, the problem was that I had bitcode on. When I clicked on the "Update to recommended project settings", it changed a few settings which probably the culprit. I turned "Enabled Bitcode" to "No" in the Build Settings and it is fixed now.

Answer 6

I was stacked this for a quite a while. In my case, my target name is something like "my-app" using dash as a part of target name. I tried to #import "my-app-Swift.h", but Xcode kept giving me errors.

I dug under 'DerivedData' folder and I found "my_app-Swift.h". So if you are using some interesting characters for the target name. You may try replace those with underscore _.