我项目中主要是对消耗品进行内购，非消耗品没进行测试，对iOS商店后台的构建，我这边不说了，下面主要是对Unity怎么实现iOS原生内购功能进行讲解。

一 在Xcode中编写原生内购代码给Unity调用

 1 IAPManager.h

#import 
     
      #import 
      
       @interface IAPManager : NSObject
       
        {    SKProduct *proUpgradeProduct;    SKProductsRequest *productsRequest;    NSString *productIndentify;}-(void)attachObserver;-(BOOL)CanMakePayment;-(void)requestProductData:(NSString *)productIdentifiers;-(void)buyRequest:(NSString *)productIdentifier;//保存Unity传递的商品ID@end
       
      
     

2 IAPManager.m

#import "IAPManager.h"@implementation IAPManager-(void) attachObserver{    NSLog(@"AttachObserver");    [[SKPaymentQueue defaultQueue] addTransactionObserver:self];}-(BOOL) CanMakePayment{    return [SKPaymentQueue canMakePayments];}-(void) requestProductData:(NSString *)productIdentifiers{    NSArray *idArray = [productIdentifiers componentsSeparatedByString:@"\t"];    NSSet *idSet = [NSSet setWithArray:idArray];    [self sendRequest:idSet];}-(void)sendRequest:(NSSet *)idSet{    SKProductsRequest *request = [[SKProductsRequest alloc] initWithProductIdentifiers:idSet];    request.delegate = self;    [request start];}-(void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response{        NSLog(@"-----------收到产品反馈信息--------------");    NSArray *products = response.products;    NSLog(@"产品Product ID:%@",response.invalidProductIdentifiers);    NSLog(@"产品付费数量: %d", (int)[products count]);    // populate UI        for (SKProduct *p in products) {        NSLog(@"product info");        NSLog(@"SKProduct 描述信息%@", [products description]);        NSLog(@"产品标题 %@" , p.localizedTitle);        NSLog(@"产品描述信息: %@" , p.localizedDescription);        NSLog(@"价格: %@" , p.price);        NSLog(@"Product id: %@" , p.productIdentifier);                UnitySendMessage("IOSIAPMgr", "ShowProductList", [[self productInfo:p] UTF8String]);    }        for(NSString *invalidProductId in response.invalidProductIdentifiers){        NSLog(@"Invalid product id:%@",invalidProductId);    }        // [request autorelease];}-(void)buyRequest:(NSString *)productIdentifier{    //  NSArray* transactions=[SKPaymentQueue defaultQueue].transactions;    //  if(transactions.count>0)    // {    // for(SKPaymentTransaction *tran in transactions)    // {    //   NSLog(@"**************************************************************%@",tran.transactionState);    //检查是否有完成的交易    //   SKPaymentTransaction* transaction =[transactions firstObject];    // if(tran.transactionState==SKPaymentTransactionStatePurchasing)    //   {    //   NSLog(@"----------------------%@",tran.transactionState);    //   [[SKPaymentQueue defaultQueue] finishTransaction:tran];    // return;    //  }    //}        // }    productIndentify=productIdentifier;    SKPayment *payment = [SKPayment paymentWithProductIdentifier:productIdentifier];    [[SKPaymentQueue defaultQueue] addPayment:payment];}-(NSString *)productInfo:(SKProduct *)product{    NSArray *info = [NSArray arrayWithObjects:product.localizedTitle,product.localizedDescription,product.price,product.productIdentifier, nil];        return [info componentsJoinedByString:@"\t"];}-(NSString *)transactionInfo:(SKPaymentTransaction *)transaction{        return [self encode:(uint8_t *)transaction.transactionReceipt.bytes length:transaction.transactionReceipt.length];        //return [[NSString alloc] initWithData:transaction.transactionReceipt encoding:NSASCIIStringEncoding];}-(NSString *)encode:(const uint8_t *)input length:(NSInteger) length{    static char table[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";        NSMutableData *data = [NSMutableData dataWithLength:((length+2)/3)*4];    uint8_t *output = (uint8_t *)data.mutableBytes;        for(NSInteger i=0; i
     
      >18) & 0x3f];        output[index + 1] = table[(value>>12) & 0x3f];        output[index + 2] = (i+1)
      
       >6) & 0x3f] : '=';        output[index + 3] = (i+2)
       
        >0) & 0x3f] : '=';    }        return [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];}-(void) provideContent:(SKPaymentTransaction *)transaction{    UnitySendMessage("IOSIAPMgr", "ProvideContent", [[self transactionInfo:transaction] UTF8String]);}//沙盒测试环境验证#define SANDBOX @"https://sandbox.itunes.apple.com/verifyReceipt"//正式环境验证#define AppStore @"https://buy.itunes.apple.com/verifyReceipt"/** *  验证购买，避免越狱软件模拟苹果请求达到非法购买问题 * */-(void)verifyPurchaseWithPaymentTransaction{    //从沙盒中获取交易凭证并且拼接成请求体数据    NSURL *receiptUrl=[[NSBundle mainBundle] appStoreReceiptURL];    NSData *receiptData=[NSData dataWithContentsOfURL:receiptUrl];        NSString *receiptString=[receiptData base64EncodedStringWithOptions:NSDataBase64EncodingEndLineWithLineFeed];//转化为base64字符串        NSString *bodyString = [NSString stringWithFormat:@"{\"receipt-data\" : \"%@\"}", receiptString];//拼接请求数据    NSData *bodyData = [bodyString dataUsingEncoding:NSUTF8StringEncoding];            //测试的时候填写沙盒路径，上APPStore的时候填写正式环境路径    NSURL *url=[NSURL URLWithString:SANDBOX];    NSMutableURLRequest *requestM=[NSMutableURLRequest requestWithURL:url];    requestM.HTTPBody=bodyData;    requestM.HTTPMethod=@"POST";    //创建连接并发送同步请求    NSError *error=nil;    NSData *responseData=[NSURLConnection sendSynchronousRequest:requestM returningResponse:nil error:&error];    if (error) {        NSLog(@"验证购买过程中发生错误，错误信息：%@",error.localizedDescription);        return;    }    NSDictionary *dic=[NSJSONSerialization JSONObjectWithData:responseData options:NSJSONReadingAllowFragments error:nil];    NSLog(@"%@",dic);    if([dic[@"status"] intValue]==0){        NSLog(@"购买成功！");        NSDictionary *dicReceipt= dic[@"receipt"];                NSLog(@"--------------%@",dicReceipt);                //NSDictionary *dicInApp=[dicReceipt[@"in_app"] firstObject];        for(NSDictionary  *tmp in dicReceipt[@"in_app"])        {                                    // NSLog(@"+++++++++++%@",dicInApp);            NSString *productIdentifier= tmp[@"product_id"];//读取产品标识            NSLog(@"+++++++++++++++++++++++++++++++++++++%@",productIdentifier);            NSLog(@"xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx%@",productIndentify);            //如果是消耗品则记录购买数量，非消耗品则记录是否购买过            NSUserDefaults *defaults=[NSUserDefaults standardUserDefaults];            if ([productIdentifier isEqualToString:productIndentify]) {                NSInteger purchasedCount=[defaults integerForKey:productIdentifier];//已购买数量                [[NSUserDefaults standardUserDefaults] setInteger:(purchasedCount+1) forKey:productIdentifier];                UnitySendMessage("IOSIAPMgr", "BuyProcuctSucessCallBack",productIdentifier.UTF8String);                break;            }else{                [[NSUserDefaults standardUserDefaults] setBool:YES forKey:productIdentifier];                UnitySendMessage("IOSIAPMgr", "BuyProcuctSucessCallBack",productIdentifier.UTF8String);                break;            }                    }    }else{        NSLog(@"购买失败，未通过验证！");    }}//监听购买结果- (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transaction{    for(SKPaymentTransaction *tran in transaction){        switch (tran.transactionState) {            case SKPaymentTransactionStatePurchased:{                NSLog(@"交易完成");                // 发送到苹果服务器验证凭证                [self verifyPurchaseWithPaymentTransaction];                [[SKPaymentQueue defaultQueue] finishTransaction:tran];                            }                break;            case SKPaymentTransactionStatePurchasing:                NSLog(@"商品添加进列表");                                break;            case SKPaymentTransactionStateRestored:{                NSLog(@"已经购买过商品");                                [[SKPaymentQueue defaultQueue] finishTransaction:tran];            }                break;            case SKPaymentTransactionStateFailed:{                NSLog(@"交易失败");                UIAlertView *mBoxView = [[UIAlertView alloc]                                         initWithTitle:@"交易提示"                                         message:@"交易失败"                                         delegate:nil                                         cancelButtonTitle:@"Cancel"                                         otherButtonTitles:@"OK", nil];                [mBoxView show];                [[SKPaymentQueue defaultQueue] finishTransaction:tran];            }                break;            default:            {                [[SKPaymentQueue defaultQueue] finishTransaction:tran];            }                break;        }    }}-(void) completeTransaction:(SKPaymentTransaction *)transaction{    NSLog(@"Comblete transaction : %@",transaction.transactionIdentifier);    [self provideContent:transaction];    [[SKPaymentQueue defaultQueue] finishTransaction:transaction];}-(void) failedTransaction:(SKPaymentTransaction *)transaction{    NSLog(@"Failed transaction : %@",transaction.transactionIdentifier);        if (transaction.error.code != SKErrorPaymentCancelled) {        NSLog(@"!Cancelled");    }    [[SKPaymentQueue defaultQueue] finishTransaction:transaction];}-(void) restoreTransaction:(SKPaymentTransaction *)transaction{    NSLog(@"Restore transaction : %@",transaction.transactionIdentifier);    [[SKPaymentQueue defaultQueue] finishTransaction:transaction];}@end
       
      
     

3  IAPInterface.h

#import 
     
      @interface IAPInterface : NSObject@end
     

4 IAPInterface.mm  Untiy主要是调用这个接口去调用IAPMananger

 

#import "IAPInterface.h"#import "IAPManager.h"@implementation IAPInterface#if defined (__cplusplus)extern "C"{#endif    IAPManager *iapManager = nil;    //初始化商品信息    void InitIAPManager(){        iapManager = [[IAPManager alloc] init];        [iapManager attachObserver];            }    //判断是否可以购买    bool IsProductAvailable(){        return [iapManager CanMakePayment];    }    //获取商品信息    void RequstProductInfo(char *p){        NSString *list = [NSString stringWithUTF8String:p];        NSLog(@"商品列表:%@",list);        [iapManager requestProductData:list];    }    //购买商品    void BuyProduct(char *p){        [iapManager buyRequest:[NSString stringWithUTF8String:p]];    }#if defined (__cplusplus)}#endif@end

二 Unity调用Xcode主要是通过 [DllImport("__Internal")]去调用，代码如下：

using UnityEngine;using System.Collections;using System.Collections.Generic;using System.Runtime.InteropServices;public class IOSIAPMgr : MonoBehaviour{                 public List
     
       productInfo = new List
      
       ();                 private static IOSIAPMgr _instance;         public static IOSIAPMgr Instance{             get{               //  if(_instance==null)                // {                    // GameObject go=new GameObject("IOSIAPMgr");                   //  DontDestroyOnLoad (go);                   //  _instance=go.AddComponent
       
        ();                                    //  }                 return _instance;             }         }    private string _goodsID = "";    void Awake()    {        _instance = this;        Init ();        StartCoroutine (InitProductInfo ());        DontDestroyOnLoad (this.gameObject);    }    private IEnumerator InitProductInfo()    {        yield return new WaitForSeconds(5f);        IOSIAPMgr.Instance.RequstALLProductInfo();    }                  [DllImport("__Internal")]         private static extern void InitIAPManager();//初始化                 [DllImport("__Internal")]         private static extern bool IsProductAvailable();//判断是否可以购买                 [DllImport("__Internal")]         private static extern void RequstProductInfo(string s);//获取商品信息                 [DllImport("__Internal")]         private static extern void BuyProduct(string s);//购买商品                 //测试从xcode接收到的字符串         void IOSToU(string s)         {             Debug.Log("[MsgFrom ios]"+s);         }                 //获取product列表         void ShowProductList(string s){             productInfo.Add(s);         }                 //获取商品回执         void ProvideContent(string s)         {             Debug.Log("[MsgFrom ios]proivideContent : "+s);         }         public  void Init ()         {            Debug.Log ("初始化InitIAPManager");            InitIAPManager();                      }        public bool IsProductVailable()        {            return IsProductAvailable();        }        public void RequstALLProductInfo()        {            if(IsProductAvailable())            {             RequstProductInfo("com.smallMBag");             RequstProductInfo("com.MidMBag");             RequstProductInfo("com.BigMBag");              RequstProductInfo("com.SpecialM");             RequstProductInfo("com.SmallFBag");             RequstProductInfo("com.Weapon");             //RequstProductInfo("com.SingleFuHuoSHi");                           RequstProductInfo("com.BigFBag");            }                  }                 /// 
        
        /// 购买商品成功的回调        /// 
        /// 
        String.       public void BuyProcuctSucessCallBack(string str)       {                                                          }        /// 
        
        /// 购买商品失败调回调        /// 
        /// 
        String.        public void BuyProcuctFailedCallBack(string str)        {                   }            }
       
      
     

三 注意事项

  1 iOS 11的系统对沙盒测试有bug，第一次会让你输入沙盒账号和密码，第二次也会再让你输入一次，最后购买的时候，直接购买失败（仅对沙盒测试，正式上线的时候没有这个问题）。

  2 iOS内购的时候非消耗品的交易一直会存在账单里面而且不会被清除。

  3 使用沙盒账号测试的时候要退出登录苹果手机的账号，不然也对导致购买失败。

  4 在内购商品之前也调用请求商品信息。