[Unity2d系列教程] 004.Unity如何调用ios的方法(SDK集成相关)

和上一篇类似，我们同样希望Unity能够直接调用IOS底层的代码，那么我们就需要研究怎么去实现它。下面让我来带大家看一个简单的例子

1.创建.h和.m文件如下

.h

//
//  myTest.m
//  Unity-iPhone
//
//  Created by Mount on 16/2/18.
//
//

#import <Foundation/Foundation.h>

@interface MyTest : NSObject

@end

.m

//  MyTest.m

#import "MyTest.h"


#if defined(__cplusplus)
extern "C"{
#endif
    extern void UnitySendMessage(const char *, const char *, const char *);
    extern NSString* _CreateNSString (const char* string);
#if defined(__cplusplus)
}
#endif

//*****************************************************************************

@implementation MyTest

// 初始化SDK
-(void)SDKInit
{
     // 弹出框测试
     UIAlertView *alter = [[UIAlertView alloc] initWithTitle:@"Title" message:@"123" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
    [alter show];
}

@end


//*****************************************************************************

#if defined(__cplusplus)
extern "C"{
#endif
    
    // 字符串转化的工具函数
    
    NSString* _CreateNSString (const char* string)
    {
        if (string)
            return [NSString stringWithUTF8String: string];
        else
            return [NSString stringWithUTF8String: ""];
    }
    
    char* _MakeStringCopy( const char* string)
    {
        if (NULL == string) {
            return NULL;
        }
        char* res = (char*)malloc(strlen(string)+1);
        strcpy(res, string);
        return res;
    }
    
    static MyTest *mytest;
    
    
    // 供u3d调用的c函数
    
    const char* _PlatformInit()
    {
        if(mytest==NULL)
        {
            mytest = [[MyTest alloc]init];
        }
        [mytest SDKInit];
        return _MakeStringCopy("3334434534543543");
    }
    
    
#if defined(__cplusplus)
}
#endif    

2.将.h和.m拷贝到Assets下你的ios目录下面

3.编写C#脚本调用代码

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

public class animationplay : MonoBehaviour {

	// 导入定义到.m文件中的C函数  
	[DllImport("__Internal")]  
	private static extern string _PlatformInit(); 

	// Use this for initialization
	void Start () {
	
	}
	
	// Update is called once per frame
	void Update () {
	
	}

	void OnGUI(){
		// create button to play animate
		if (GUI.Button (new Rect (Screen.width / 2 + 230, Screen.height / 2 + 50, 100, 40), "clickanimate")) {
			Animator ani = this.gameObject.GetComponent<Animator>();
			ani.Play("animation", -1, 0f);  
			ani.Update(0f); 
		}
		// create button to call ios SDK 
		if (GUI.Button (new Rect (Screen.width / 2 + 230, Screen.height / 2, 100, 40), "callSDK")) {
			string returnstring = _PlatformInit();
		}
	}
}

4.把这个脚本绑定到物体上，然后导出xcode项目，用xcode连接真机就可以看到结果。如下