I came across a problem trying to import swift code from one target of a library into another objective-c based target in the same library, but I cannot get my objective-c code to find the generated "-Swift.h" file I need to import, is it a bug or am I doing something wrong/strange?
My package looks like so:
// swift-tools-version: 5.8
// The swift-tools-version declares the minimum version of Swift required to build this package.
import PackageDescription
let package = Package(
name: "ImportSwiftToObjC",
products: [
// Products define the executables and libraries a package produces, and make them visible to other packages.
.library(
name: "ImportSwiftToObjC",
targets: [
"SwiftExport",
"ObjCImport",
"Bridge"
]),
],
dependencies: [
// Dependencies declare other packages that this package depends on.
// .package(url: /* package url */, from: "1.0.0"),
],
targets: [
// Targets are the basic building blocks of a package. A target can define a module or a test suite.
// Targets can depend on other targets in this package, and on products in packages this package depends on.
.target(
name: "SwiftExport",
dependencies: []
),
.target(
name: "ObjCImport",
dependencies: ["SwiftExport"]
),
.target(
name: "Bridge",
dependencies: ["ObjCImport"]
),
.testTarget(
name: "ImportSwiftToObjCTests",
dependencies: ["ObjCImport"]),
]
)
Directory layout:
├── Package.swift
├── README.md
├── Sources
│ ├── Bridge
│ │ └── Export.swift
│ ├── ObjCImport
│ │ ├── ObjCImport.m
│ │ └── include
│ │ └── ObjCImport.h
│ └── SwiftExport
│ └── SwiftExport.swift
└── Tests
└── ImportSwiftToObjCTests
└── ImportSwiftToObjCTests.swift
I have some swift code in the 'SwiftExport' I want to use in the Objective C target 'ObjCImport'. I should be able to import the SwiftExport-Swift.h generated file into ObjCImport.m, but whatever I try, the header file is not found.. I see it has been generated in the build folder, and exported in the module map of SwiftExport, but that's as far as I get.
I would expect to be able to do something like this:
#import <Foundation/Foundation.h>
#import "ObjCImport.h"
// Where do I find the SwiftExport-Swift.h file? I see it in the build folder, it exists
#import <SwiftExport/SwiftExport-Swift.h>
@implementation ObjCImport
+ (NSString*)helloWorld {
return @"Hello, World!";
// Would like to return something from the swift package
//return SwiftExport.helloWorld;
}
@end
Reason for doing this relate to another bug trying to import some dynamic libraries with resources and I thought I found a workaround, I'll start with this problem first...
Can anyone point me in the right direction?