끝

2019.3 버전일경우

stackoverflow.com/questions/31636408/write-unity-ios-plugin-in-swift-code

이후버전일경우 참고자료

qiita.com/mao_/items/2305822054dadb2c5da8

qiita.com/ohbashunsuke/items/8f3b7c733fc70a180941

유니티 내부에 세가지 파일을 만들어 준다

Plugins/iOS/Bridge.mm

Plugins/iOS/SwiftTest.swift

Scriptes/SwiftTest.cs

Bridge.mm과 SwiftTest.swift는 텍스트문서를 이용해 만들고 확장자를 바꿔준다.

그리고 아래같이 입력해준다

Bridge.mm과 SwiftTest.swift는 텍스트문서로 열거나 IDE로 열면 된다.

//SwiftTest.cs

using System.Collections;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using UnityEngine;

public class SwiftTest : MonoBehaviour
{
    [DllImport("__Internal")]
    private static extern void callSwiftTestFunc();

    void Start()
    {
        Press();
    }


    public void Press()
    {
        callSwiftTestFunc();
    }
}

//Bridge.mm
#import <UnityFramework/UnityFramework-Swift.h>

extern "C" {
  void callSwiftTestFunc() {
      [SwiftTest testFunc];
  }
}

//SwiftTest.swift

import Foundation

@objc public class SwiftTest : NSObject {
    @objc public static func testFunc() {
        print("Swift Test")
    }
}

빌드하고 실행해서 실행해보면 다음과 같이 xcode 로그에 뜬다

인자받을수 있게 개조할것이다

//SwiftTest.cs

using System.Collections;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using UnityEngine;

public class SwiftTest : MonoBehaviour
{
    [DllImport("__Internal")]
    private static extern void callSwiftTestFunc();


    [DllImport("__Internal")]
    private static extern void callSwiftTestFunc2(string text);


    void Start()
    {
        Press();
    }


    public void Press()
    {
        callSwiftTestFunc();
        callSwiftTestFunc2(Time.time.ToString());
    }
}

//Bridge.mm
#import <Foundation/Foundation.h>
#import <UnityFramework/UnityFramework-Swift.h>

extern "C" {
  void callSwiftTestFunc() {
      [SwiftTest testFunc];
  }
  void callSwiftTestFunc2(const char *text) {
      [SwiftTest testFunc2 :[NSString stringWithUTF8String:text]];
  }
}

//SwiftTest.swift

import Foundation

@objc public class SwiftTest : NSObject {
    @objc public static func testFunc() {
        print("Swift Test")
    }
    @objc public static func testFunc2(_ text: String) {
        print("Swift Test2\(text)")
    }

}

결과

하지만 함수는 리턴값이 있어야 쓸만하지 않은가

그래서 한번 더 개조했다

참고한곳 : stackoverflow.com/questions/37047781/how-to-return-string-from-native-ios-plugin-to-unity

//SwiftTest.cs

using System.Collections;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using UnityEngine;
using UnityEngine.UI;

public class SwiftTest : MonoBehaviour
{
    [DllImport("__Internal")]
    private static extern void callSwiftTestFunc();


    [DllImport("__Internal")]
    private static extern void callSwiftTestFunc2(string text);



    [DllImport("__Internal")]
    private static extern int callSwiftTestFunc3();


    [DllImport("__Internal")]
    private static extern string callSwiftTestFunc4();




    public Text UItext;


    void Start()
    {
    }


    public void Press()
    {
        callSwiftTestFunc();
        callSwiftTestFunc2(Time.time.ToString());
        UItext.text = callSwiftTestFunc3().ToString();
        UItext.text +="\n"+callSwiftTestFunc4().ToString();
    }
}

//Bridge.mm


#import <Foundation/Foundation.h>
#import <UnityFramework/UnityFramework-Swift.h>

extern "C" {
  void callSwiftTestFunc() 
  {
      [SwiftTest testFunc];
  }
  
  void callSwiftTestFunc2(const char *text) 
  {
      [SwiftTest testFunc2 :[NSString stringWithUTF8String:text]];
  }
  
  int callSwiftTestFunc3()
  {
      return [SwiftTest testFunc3];
  }
  
  
  
  
  char* callSwiftTestFunc4() 
  {
	  NSString* nsStr=[SwiftTest testFunc4];
	  const char* nsStrUTF8=(char*)[nsStr UTF8String];
	  char* cString=(char*)malloc(strlen(nsStrUTF8)+1);
	  strcpy(cString, nsStrUTF8);
      return cString;
  }
}

import Foundation

@objc public class SwiftTest : NSObject 
{
    @objc public static func testFunc() 
	{
        print("Swift Test")
    }
	
    @objc public static func testFunc2(_ text: String) 
	{
        print("Swift Test2\(text)")
    }
	
    @objc public static func testFunc3() -> Int 
	{
        print("testFunc3")
        return (Int)(NSDate().timeIntervalSince1970)
    }

    @objc public static func testFunc4() -> String 
	{
        print("testFunc4")
		let dateFormatter = DateFormatter()
		dateFormatter.dateFormat = "yyyy-MM-dd HH:mm:ss"
        return dateFormatter.string(from:Date())
    }
}

잘된다