从开发iOS到现在，内购app也做过两个了，现在好好记录下这个流程。
首先需要在所属的app下创建物品，这个流程网上很多也不难。这边就详细说明了，可参考下面网址。
http://blog.csdn.net/shenjie12345678/article/details/40978977/
我们定义好一个或多个product 后 每个product id对应着一个product。 我们拿到一个或多个product id，数据处理后对appstore 发起购物请求，等待appstore处理后的响应(之间很多操作，都是appStore和用户之间，客户端无法干预), 客户端对购物成功的回执单进行校验。
这个流程基本就是这样，如上图所示。
理清整个流程后，我们对内购就非常清晰了，要注意的就是细节了，对各种异常情况的处理。各种case 见下列枚举，基本和app的sdk保持一致
typedef enum : NSUInteger {
EPaymentTransactionStateNoPaymentPermission, //没有Payment权限
EPaymentTransactionStateAddPaymentFailed, //addPayment失败
EPaymentTransactionStatePurchasing,//正在购买
EPaymentTransactionStatePurchased,//购买完成(销毁交易)
EPaymentTransactionStateFailed, //购买失败(销毁交易)
EPaymentTransactionStateCancel,//用户取消
EPaymentTransactionStateRestored,//恢复购买(销毁交易)
EPaymentTransactionStateDeferred, //最终状态未确定
} EPaymentTransactionState;
内购有个重要的协议 SKPaymentTransactionObserver
需要特殊特殊处理，不多说废话 直接附上代码
#pragma mark - SKPaymentTransactionObserver
- (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray<SKPaymentTransaction *> *)transactions
{
for (SKPaymentTransaction *transaction in transactions)
{
EPaymentTransactionState state;
switch (transaction.transactionState){
case SKPaymentTransactionStatePurchasing:
{
// 连接appStore
state = EPaymentTransactionStatePurchasing;
}
break;
case SKPaymentTransactionStatePurchased:
{
state = EPaymentTransactionStatePurchased;
//交易完成
if (isServiceVerify) {
[self completeTransaction:transaction];
}
else
{
//本地作校验
[self verifyPurchase:transaction];
}
}
break;
case SKPaymentTransactionStateFailed:
{
//交易失败
if (transaction.error.code != SKErrorPaymentCancelled)
{
state = EPaymentTransactionStateFailed;
}else
{
state = EPaymentTransactionStateCancel;
}
[self finshTransaction:transaction];
}
break;
case SKPaymentTransactionStateRestored:
{
state = EPaymentTransactionStateRestored;
//已经购买过该商品
[self finshTransaction:transaction];
}
break;
case SKPaymentTransactionStateDeferred:
{
state = EPaymentTransactionStateDeferred;
}
break;
default:
break;
}
if (self.delegate && [self.delegate respondsToSelector:@selector(updatedTransactions:)]) {
[self.delegate updatedTransactions:state];
}
}
}
补充一点 ：一旦启动了开始购买流程，必须要调用
//结束交易
[[SKPaymentQueue defaultQueue] finishTransaction: transaction];
来结束购买流程，否者在下一次调用到 方法
[[SKPaymentQueue defaultQueue] addTransactionObserver:self];
还是会触发继续购买流程，这个特性可以解决购买过程中出现的各种异常场景，比如购买完成app crash（没网络了），在下一次启动app时调用上面的方法可以回复购买。
具体类 放在gitHub下
https://github.com/weskhen/InAppPurchasing
贴上一段苹果本地校验成功的json返回 估计服务器也是相同的
Printing description of jsonResponse:
{
environment = Sandbox; //购买环境
receipt = {
"adam_id" = 0;
"app_item_id" = 0;
"application_version" = 30;
"bundle_id" = "com.wesk.PaoBa";
"download_id" = 0;
"in_app" = (
{
"is_trial_period" = false;
"original_purchase_date" = "2016-09-27 04:52:58 Etc/GMT";
"original_purchase_date_ms" = 1474951978000;
"original_purchase_date_pst" = "2016-09-26 21:52:58 America/Los_Angeles";
"original_transaction_id" = 1000000238538249;
"product_id" = “com.PaoBa.Product.001";
"purchase_date" = "2016-09-27 04:52:58 Etc/GMT";
"purchase_date_ms" = 1474951978000;
"purchase_date_pst" = "2016-09-26 21:52:58 America/Los_Angeles";
quantity = 1;
"transaction_id" = 1000000238538249;
}
);
"original_application_version" = "1.0";
"original_purchase_date" = "2013-08-01 07:00:00 Etc/GMT";
"original_purchase_date_ms" = 1375340400000;
"original_purchase_date_pst" = "2013-08-01 00:00:00 America/Los_Angeles";
"receipt_creation_date" = "2016-09-27 07:42:18 Etc/GMT";
"receipt_creation_date_ms" = 1474962138000;
"receipt_creation_date_pst" = "2016-09-27 00:42:18 America/Los_Angeles";
"receipt_type" = ProductionSandbox;
"request_date" = "2016-09-27 07:43:44 Etc/GMT";
"request_date_ms" = 1474962224281;
"request_date_pst" = "2016-09-27 00:43:44 America/Los_Angeles";
"version_external_identifier" = 0;
};
status = 0;
}
苹果反馈的状态码；
21000 App Store无法读取你提供的JSON数据
21002 收据数据不符合格式 （踩过坑，越狱机会出现）
21003 收据无法被验证
21004 你提供的共享密钥和账户的共享密钥不一致
21005 收据服务器当前不可用
21006 收据是有效的，但订阅服务已经过期。当收到这个信息时，解码后的收据信息也包含在返回内容中
21007 收据信息是测试用（sandbox），但却被发送到产品环境中验证
21008 收据信息是产品环境中使用，但却被发送到测试环境中验证
