#import <StoreKit/StoreKit.h>
@interface IAPUnity : NSObject<SKPaymentTransactionObserver,SKProductsRequestDelegate,SKRequestDelegate>

@property(retain,nonatomic)NSArray* products;       //产品列表
@property(retain,nonatomic)NSSet* productIdf;       //产品标记符
@property(retain,nonatomic)SKProductsRequest* request;  //用于请求相关信息

///获取商店信息
-(void)requestStart;

///初始化
- (id)initProductIdf:(NSSet*)productIdf;

///购买
-(void)buyProduct;

///恢复交易
-(void)restorer;

@end

#import "IAPUnity.h"

@interface IAPUnity ()

@property(retain,nonatomic)SKProduct* product;

@end


@implementation IAPUnity

- (id)initProductIdf:(NSSet*)productIdf
{
    self = [super init];
    if (self) {
        self.productIdf=productIdf;
        [self getProducts];
    }
    return self;
}
-(void)getProducts
{
    _request=[[SKProductsRequest alloc]initWithProductIdentifiers:_productIdf];
}
-(void)requestStart
{
    [_request setDelegate:self];
    ///请求数据
    [_request start];
}

#pragma SKProductsRequestDelegate 
- (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response
{
    ///判断用户是否禁用内购功能
    if ([SKPaymentQueue canMakePayments]) {
        NSLog(@"%@",response.products);
        //得到产品列表
        self.products=response.products;
    
    }
    
    ///获取成功列表成功,并且取到第0个的相关信息
    if ([response.products count]>0) {
        self.product=[response.products objectAtIndex:0];
        NSLog(@"产品本地标题:%@",[self.product localizedTitle]);
        NSLog(@"产品描述:%@",self.product.localizedDescription);
        NSLog(@"产品价格:%@",self.product.price);
        NSLog(@"产品标识:%@",self.product.productIdentifier);
    }
    
    
    ///发生错误的时候输出错误信息
    for (NSString *invalidProductId in response.invalidProductIdentifiers)
    {
        NSLog(@"Invalid product id: %@" , invalidProductId);
    }
}
-(void)buyProduct
{
    if (self.product) {
        
        if ([SKPaymentQueue canMakePayments]) {
            SKPayment* payment=[SKPayment paymentWithProduct:self.product];
            ///为支付队列增加一个观察者
            [[SKPaymentQueue defaultQueue]addTransactionObserver:self];
            ///增加了一个观察者到付款队列中
            [[SKPaymentQueue defaultQueue]addPayment:payment];
        }
    }
}

-(void)restorer
{
    
    [[SKPaymentQueue defaultQueue]restoreCompletedTransactions];
}


// Sent when the transaction array has changed (additions or state changes).  Client should check state of transactions and finish as appropriate.
- (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions
{
    for (SKPaymentTransaction* transaction in transactions) {
        switch (transaction.transactionState) {
            case SKPaymentTransactionStatePurchasing:
            {
                NSLog(@"购买中");
            }
                break;
            case SKPaymentTransactionStatePurchased:
            {
                NSLog(@"SKPaymentTransactionStatePurchased");
                NSLog(@"%@",[[NSString alloc]initWithData:transaction.transactionReceipt encoding:NSUTF8StringEncoding]);
                NSString* temp=[[NSString alloc]initWithData:transaction.transactionReceipt encoding:NSUTF8StringEncoding];
                UIAlertView* alertView=[[UIAlertView alloc]initWithTitle:@"提示" message:@"内购成功" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil, nil];
                [alertView show];
                NSLog(@"BASE64:%@",[self encode:temp.UTF8String length:temp.length]);
                [[SKPaymentQueue defaultQueue]finishTransaction:transaction];
            }
                break;
            case SKPaymentTransactionStateFailed:
            {
                if (transaction.error.code!=SKErrorPaymentCancelled) {
                    NSLog(@"Failed....%d",transaction.error.code);
                    NSLog(@"%@",transaction.error.localizedDescription);
                }
                [[SKPaymentQueue defaultQueue]finishTransaction:transaction];
            
            }
                break;
            case SKPaymentTransactionStateRestored:
            {
                [[SKPaymentQueue defaultQueue]finishTransaction:transaction];
            }
                break;
            default:
                break;
        }
    }

}


@end

     SKPaymentTransactionStatePurchasing,    // 这一个是应用商店是正在处理交易的状态
     SKPaymentTransactionStatePurchased,     // 这一个是应用商店成功处理付款的状态
     SKPaymentTransactionStateFailed,        // 这儿是应用商店处理失败的状态
     SKPaymentTransactionStateRestored       // 这个是应用商店恢复之前的状态