Import Objective-c framework into Swift framework project

Question

I am building a framework in which I need to import some objective-c frameworks.

For now I need to import "Beaconstac.framework", but we can not add a bridging header in a swift framework project.

How can I use this framework in my project?

I tried:

import Beaconstac

But the compiler reports error "No Such Module"

Is there any alternative way to do this?

Headlight

Check this out #24002869 – Teagan

And this developer.apple.com/library/ios/documentation/Swift/Conceptual/… – Teagan

this answer is about how to use objective-c framework in swift but i am developing a swift framework not swift application – Headlight

Doesn't matter you creating framework or application. you should be able to add external files to your project by bridging ! or may be i didn't get your concern? – Teagan

we can not add a bridging header if we are creating a framework in swift. – Headlight

check out this answer here this guy is saying we do not need a bridging header in a framework but its not working. #28815987 – Headlight

From the link i shared: "You can import external frameworks that have a pure Objective-C codebase, a pure Swift codebase, or a mixed-language codebase. The process for importing an external framework is the same whether the framework is written in a single language or contains files from both languages. When you import an external framework, make sure the Defines Module build setting for the framework you’re importing is set to “Yes"." – Teagan

Just link the binary in your swift and it does not matter if that external framework is in swift or objc. Try if this works https://mcmap.net/q/683471/-building-a-swift-framework-with-references-to-objective-c-code – Latter

you do not need bridging headers, make sure you're actually linking the library. (you can see this in build settings) – Vie

. @Latter is also referring to same concept that has been described in apple developer documents (second link: Importing External Frameworks) – Teagan

I am facing the same issue. Are you able resolve this issue? – Balkan

Answer 1

You need to import the Beaconstac framework in your umbrella header. That is, if you'd ordinarily use, e.g., #import <Beaconstac/Beaconstac.h> in an Obj-C bridging header, for a framework you need to put that in the umbrella header.

See this chapter in Apple's documentation for more info:

https://developer.apple.com/library/ios/documentation/Swift/Conceptual/BuildingCocoaApps/MixandMatch.html#//apple_ref/doc/uid/TP40014216-CH10-ID130

Mackler

its giving me error "include non modular header inside framework module" – Headlight

@KrishnaVerma How did you fix that? – Ari

@KrishnaVerma I have the same issue. Did you find the solution? – Peacoat

Answer 2

Steps to include an existing Obj C framework in a swift framework project

Say we are creating an “SwiftProj.framework" project in swift which internally has to use an Objective C “ObjC.framework”

1. Place the ObjC.framework in Frameworks folder, Link to Swift framework project via Linked Frameworks and Libraries, and create a module.modulemap file at the same level.
2. In module.modulemap

module ObjC{
    header "ObjC.framework/Headers/ClassA.h"
    export *
}

3. Create xcconfig file (File->New->iOS->Other->Configuration Settings file)

4. In xcconfig file

SWIFT_INCLUDE_PATHS = $(SRCROOT)/
MODULEMAP_PRIVATE_FILE = $(SRCROOT)/module.modulemap

Now you can access ObjC.ClassA in SwiftProj.framework

Eliason

Do you have an example project for this? – Dissatisfaction

@girish, I tried this, but not working. How did you make it to work? Could you give me some hint on anywhere that I need to be careful about? Also when you create .xcconfig file, did you set the config path anywhere? Appreciate your help. – Crick

@Atul, where to place the xcconfig file? How the project recognize the xcconfig file, too? Could you give more detail about it – Blob

@Eliason followed same steps. But got error header "ObjC.framework/Headers/ClassA.h" not found. – Shannonshanny

what if we are using CocoaPods? where should the module.modulemap file be located? – Misfile

if you don't want to using xcconfig file. First go to project -> build setting, fine Import Paths under Swift Compiler - Search Paths input $(SRCROOT) , this is for complier to find out the modulemap file that you placed. Second go to Private Module Map File under Packaging input $(SRCROOT)/module.modulemap – Squirmy

Answer 3

Create a file called module.modulemap and include the following contents:

module ObjCFrameworkName {
    header "ObjCFrameworkName.framework/Headers/ObjCFrameworkNameUmbrellaHeader.h"
    export *
}

Be aware that you need to have the correct path to your Obj-C framework's umbrella header which may differ slightly with what's listed in the example above.

If you are still stuck, I would strongly suggest taking a look at this project.

Blastoderm