IOS与Unity交互

学习了宣雨松的两篇Unity和IOS交互的文章，自己动手做了下，遇到了些问题，在此记录

先说IOS发送消息给Unity：（文章地址：http://www.xuanyusong.com/archives/517）

先在unity写好脚本，并拖到cube上，代码是给IOS来调用的，代码如下：

var vrotate : Vector3;

//向左旋转
function MoveLeft()
{
    var rotate : float = Time.deltaTime * 100;
    vrotate = Vector3.up * rotate;
    transform.Rotate(vrotate, Space.World);
}

//向右旋转
function MoveRight()
{
    var rotate : float = Time.deltaTime * 100;
    vrotate = Vector3.down* rotate;
    transform.Rotate(vrotate, Space.World);
}

//向上旋转
function MoveUp(){
     var rotate : float = Time.deltaTime * 100;
    vrotate = Vector3.right* rotate;
    transform.Rotate(vrotate, Space.World);
}

//向下旋转
function MoveDown(){
    var rotate : float = Time.deltaTime * 100;
    vrotate = Vector3.left* rotate;
    transform.Rotate(vrotate, Space.World);
}

接下来将这个Unity工程导出成Xcode项目，双击xcodeproj后缀的工程文件，默认是xcode打开此文件，

右键Classws文件夹 → New File... → Objective-C File 取名MyView，那么会添加MyView.m的文件，此时把后缀m改成mm

同样在新建个Header File，名也为MyView，那么会添加MyView.h的文件

MyView.h的代码如下：

#ifndef Unity_iPhone_MyView_h
#define Uni

#import <UIKit/UIKit.h>

@interface MyView : UIViewController

@end

#endif

MyView.mm的代码如下：

#import "MyView.h"
@implementation MyView

// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
-(void)viewDidLoad{
    [super viewDidLoad];
    //创建label视图
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(, , , )];
    //设置显示内容
    label.text = @"IOS调用Unity";
    //设置背景颜色
    label.backgroundColor = [UIColor blueColor];
    //设置文字颜色
    label.textColor = [UIColor whiteColor];
    //设置显示位置居中
    label.textAlignment = UITextAlignmentCenter;
    //设置字体大小
    label.font = [UIFont fontWithName:[[UIFont familyNames] objectAtIndex:] size:];

    //创建按钮
    UIButton *button0 = [UIButton buttonWithType:];
    //设置按钮范围
    button0.frame = CGRectMake(, , , );
    //设置按钮显示内容
    [button0 setTitle:@"矩形左旋转" forState:UIControlStateNormal];
    //设置按钮改变后 绑定响应方法
    [button0 addTarget:self action:@selector(LeftButtonPressed) forControlEvents:UIControlEventTouchUpInside];

    //创建按钮
    UIButton *button1 = [UIButton buttonWithType:];
    //设置按钮范围
    button1.frame = CGRectMake(, , , );
    //设置按钮显示内容
    [button1 setTitle:@"矩形右旋转" forState:UIControlStateNormal];
    //设置按钮改变后 绑定响应方法
    [button1 addTarget:self action:@selector(RightButtonPressed) forControlEvents:UIControlEventTouchUpInside];

    //创建按钮
    UIButton *button2 = [UIButton buttonWithType:];
    //设置按钮范围
    button2.frame = CGRectMake(, , , );
    //设置按钮显示内容
    [button2 setTitle:@"矩形上旋转" forState:UIControlStateNormal];
    //设置按钮改变后 绑定响应方法
    [button2 addTarget:self action:@selector(UpButtonPressed) forControlEvents:UIControlEventTouchUpInside];

    //创建按钮
    UIButton *button3 = [UIButton buttonWithType:];
    //设置按钮范围
    button3.frame = CGRectMake(, , , );
    //设置按钮显示内容
    [button3 setTitle:@"矩形下旋转" forState:UIControlStateNormal];
    //设置按钮改变后 绑定响应方法
    [button3 addTarget:self action:@selector(DownButtonPressed) forControlEvents:UIControlEventTouchUpInside];

    //向view添加
    [self.view addSubview:label];
    [self.view addSubview:button0];
    [self.view addSubview:button1];
    [self.view addSubview:button2];
    [self.view addSubview:button3];
}

//向左按钮
-(void)LeftButtonPressed{
    UnitySendMessage("Cube","MoveLeft","");
}

//向右按钮
-(void)RightButtonPressed{
    UnitySendMessage("Cube","MoveRight","");
}
//向上按钮
-(void)UpButtonPressed{
    UnitySendMessage("Cube","MoveUp","");
}

//向下按钮
-(void)DownButtonPressed{
    UnitySendMessage("Cube","MoveDown","");
}

- (void)didReceiveMemoryWarning {
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc. that aren't in use.
}

- (void)viewDidUnload {
    [super viewDidUnload];
}

- (void)dealloc {
    [super dealloc];
}

@end

找到UnityAppController.mm此文件：
导入#include “MyView.h”

在UnityAppController.mm文件下的这个方法（didFinishLaunchingWithOptions）里面
加入如下代码：

MyView * myView = [[MyView alloc] init];
[UnityGetGLView() addSubview:myView.view];
return YES;

大功告成！

Unity发送消息给IOS：（文章地址：http://www.xuanyusong.com/archives/521）

新建一个Unity脚本，名为SDK

using UnityEngine;
using System.Runtime.InteropServices;

public class SDK
{
     //导出按钮以后将在xcode项目中生成这个按钮的注册，
     //这样就可以在xocde代码中实现这个按钮点击后的事件。
     [DllImport("__Internal")]
     private static extern void _PressButton0 ();

     public static void ActivateButton0 ()
     {

        if (Application.platform != RuntimePlatform.OSXEditor)
        {
            //点击按钮后调用xcode中的 _PressButton0 ()方法，
            //方法中的内容须要我们自己来添加
            _PressButton0 ();
        }
     }

     //和上面一样
     [DllImport("__Internal")]
     private static extern void _PressButton1 ();

     public static void ActivateButton1 ()
     {
         if (Application.platform != RuntimePlatform.OSXEditor)
        {
            _PressButton1 ();
        }
     }
}

再新建一个脚本Main.cs

using UnityEngine;
using System.Collections;

public class Main : MonoBehaviour {

//声明两个Texture变量，图片资源在外面连线赋值
public Texture Button0;
public Texture Button1;

    // Use this for initialization
    void Start () {

    }

    // Update is called once per frame
    void Update () {

    }

    //这个方法用于绘制
    void OnGUI() {
        //绘制两个按钮
        if(GUI.Button(new Rect(,,,),Button0))
        {
            //返回值为ture说明这个按钮被点击
            SDK.ActivateButton0();
        }    

        //绘制两个按钮
        if(GUI.Button(new Rect(,,,),Button1))
        {
            //返回值为ture说明这个按钮被点击
            SDK.ActivateButton1();
        }
    }
}

将Untiy3D项目导出成Xcode项目，我们用Xcode打开它。添加Unit3D中GUI按钮点击后的响应事件。创建一个类命名为MyView.h 、MyView.mm，用它来接收Unity3D 回馈回来的消息，_PressButton0 与 _PressButton1 这两个方法在Unity3D中已经注册过，所以在这个类中我们须要对它进行Xcode中的实现。

MyView.h代码如下：

#ifndef Unity_iPhone_MyView_h
#define Unity_iPhone_MyView_h

@interface MyView : UIViewController

void _PressButton0();

void _PressButton1();

@end
#endif

MyView.mm代码如下：

关键点：unity调用Xcode封装的函数，声明时需要在自己写的MyView类的头部引用extern "C"

extern "C"
#import "MyView.h"

@implementation MyView

//接收Unity3D 传递过来的信息

void _PressButton0()
{
    UIAlertView *alert = [[UIAlertView alloc] init];
    [alert setTitle:@"测试Unity向IOS发送消息"];
    [alert setMessage:@"点击了第一个按钮"];
    [alert addButtonWithTitle:@"确定"];
    [alert  show];
    [alert release];
}

void _PressButton1()
{

    UIAlertView *alert = [[UIAlertView alloc] init];
    [alert setTitle:@"测试Unity向IOS发送消息"];
    [alert setMessage:@"点击了第二个按钮"];
    [alert addButtonWithTitle:@"确定"];
    [alert  show];
    [alert release];
}

@end