How can I use an .a static library in swift?

问题:

I want to use my webrtc .a static library in swift. Can you help please? I read you can´t use static libraries in swift, is that true?

回答1:

Have you fixed this problem you asked? I meet this problem on today too, and I've fixed it just a moment. If you don't have fixed this problem, you can try the below steps:

p.s.: the 2 projects are in the same workspace (the static lib project and the App project), the static lib project is build before the app project. The workspace structure as the pic shows:

1. In the static lib project, all the .h files are need add to "Build Phases/Copy Files":

2. Drag the static lib product file (the .a file) to the app project, see the pic:

(path: "app project/Build Phases/Link Binary With Libraries")

*if you care about the red color mark for the .a file, you just need choose the "generic iOS device" as the build device to re-build the static lib project, and re-drag the .a to the app project(the red one can be delete)

3. Set the "Library Search Path" in you app project:

this is the .a file path which the project built in: $(USER_LIBRARY_DIR)/Developer/Xcode/DerivedData/StockApp-fkjqyvsniiauxogkivalcduqeotj/Build/Products/Debug-iphoneos

4. Create Bridging-Header file for your app project, and import the static lib in it, in my case I include "StaticLib/StaticLib.h" and "CommonFoundation/CommonFoundation.h":

5. Add the Bridging-Header file path to "Objective-C Bridging Header" of you app project:

Then all done, you can use the functions of the static libraries now.

回答2:

Yes, you can use static libraries in Swift. Go to your Build Phases and under "Link Binary With Libraries" and add them there.

Alternatively, you can go under Build Settings and in "Search Paths" append the "Library Search Paths" value to include the path to the folder that your .a file is in.

You can add headers for your library the same way under the "Header Search Paths"

Also keep in mind that if this library is written in Objective-C, you will need a Bridging Header to use it in Swift.

回答3:

With Xcode 9 using static libraries supported with Swift. You can use like using in Objective-C. Xcode Release Notes

Xcode supports static library targets which contain Swift code. Debugging applications that use Swift static libraries may require a complete set of build artifacts that are in their original location