# 一、以下是消耗类和非消耗类的正常流程（订阅类的不太清楚） 1.进入充值页面，向app server获取productIdList及展示信息。 2.用productIdList调iapsdk获取productDetailList（用来发起支付的参数）。 3.用户选择一个productDetail，然后调iap sdk发起支付。 4.监听到apple支付成功，将purshaseId、receipt发给app server。 5.app server 向apple server发起校验请求，比对in_app数组里对应的purshaseId的校验结果，返回给第4步app的请求。 6.app端收到成功结果后finish掉该productDetail。 # 二、以下是应对异常情况 a.上面第4步断网或者app闪退。 b.上面第6步因为网络原因没有finish该productDetail。 针对第a种异常： i.下次进入app用iap sdk获取未处理(未finish)栈里的productDetail(这个flutter iap plugin没有提供方法，我自己fork后加了该方法)（注意这里是单数，只有一个未处理），然后接着走正常流程的4、5、6。 ii.再次购买时，先执行i的步骤，确保处理完毕了才能发起第二笔支付，否则获取未处理productDetail为复数时会导致receipt紊乱导致校验失败造成卡单（未处理栈里一直在）。 针对第b种异常： a的异常处理会让app server重复校验，所以这里需要app server做一下记录，校验过的结果存在数据库里，再发起该purshaseId校验直接返回结果，避免重复增加余额。 # 三、编码参考 环境： flutter版本: v1.9.1+hotfix.4 插件依赖：in_app_purchase: ``` git: url: https://github.com/qq326646683/plugins.git ref: 13df320b6112a3a4abfbec47bba53b2f95402637 path: packages/in_app_purchase ``` ``` balance_page.dart: @override void initState() { InappPurchaseService.getInstance().initListener(context); super.initState(); /// 步骤1 ResponseResult<List<AppleProduct>> response = await OrderService.getInstance().getAppleProduct(); if (response.isSuccess) { /// 步骤2 _initStoreInfo(response.data); } } @override void dispose() { InappPurchaseService.getInstance().removeListener(); super.dispose(); } _initStoreInfo(List<AppleProduct> appProductList) async { productDetailList = await InappPurchaseService.getInstance().initStoreInfo(context, appProductList); } build() { ... SMClickButton( /// 步骤3 onTap: () => InappPurchaseService.getInstance().toCharge(productDetailList, selectIndex, context), child: Container( width: _Style.btnContainerW, height: _Style.bottomContainer, color: SMColors.btnColorfe373c, alignment: Alignment.center, child: Text('确认充值', style: SMTxtStyle.colorfffdp16,), ), ), } ``` ``` inapp_purchase_service.dart： initListener(BuildContext context) { final Stream purchaseUpdates = InAppPurchaseConnection.instance.purchaseUpdatedStream; _subscription = purchaseUpdates.listen((purchases) { _listenToPurchaseUpdated(context, purchases); }, onDone: () => _subscription.cancel(), onError: (error) => LogUtil.i(InappPurchaseService.sName, "error:" + error)); } void _listenToPurchaseUpdated(BuildContext context, List<PurchaseDetails> purchaseDetailsList) { purchaseDetailsList.forEach((PurchaseDetails purchaseDetails) async { if (purchaseDetails.status == PurchaseStatus.pending) { LogUtil.i(InappPurchaseService.sName, 'PurchaseStatus.pending'); LoadingUtil.show(context); } else { LoadingUtil.hide(); if (purchaseDetails.status == PurchaseStatus.error) { ToastUtil.showRed("交易取消或失败"); } else if (purchaseDetails.status == PurchaseStatus.purchased) { ToastUtil.showGreen("交易成功,正在校验"); LogUtil.i(InappPurchaseService.sName, "purchaseDetails.purchaseID:" + purchaseDetails.purchaseID); LogUtil.i(InappPurchaseService.sName, "purchaseDetails.serverVerificationData:" + purchaseDetails.verificationData.serverVerificationData); /// 步骤4 _verifyPurchase(purchaseDetails, needLoadingAndToast: true, context: context); } } }); } // return bool needLock Future<bool> _verifyPurchase(PurchaseDetails purchaseDetails, {bool needLoadingAndToast = false, BuildContext context}) async { Map param = { "transactionId" : purchaseDetails.purchaseID, "receipt": purchaseDetails.verificationData.serverVerificationData, }; if (needLoadingAndToast) LoadingUtil.show(context); ResponseResult<dynamic> response = await ZBDao.charge(param); if (needLoadingAndToast) LoadingUtil.hide(); if (response.isSuccess) { if (response.data == true) { /// 步骤6 await InAppPurchaseConnection.instance.completePurchase(purchaseDetails); if (needLoadingAndToast) ToastUtil.showGreen('充值成功'); OrderService.getInstance().getBalance(); return false; } else { if (needLoadingAndToast) ToastUtil.showRed('充值失败'); return true; } } else { LogUtil.i(InappPurchaseService.sName, '处理失败'); return true; } } Future<List<ProductDetails>> initStoreInfo(BuildContext context, List<AppleProduct> appleProductList) async { final bool isAvailable = await _connection.isAvailable(); if (!isAvailable) { return null; } List<String> productIdList = []; for(AppleProduct appleProduct in appleProductList) { productIdList.add(appleProduct.productId); } LoadingUtil.show(context); ProductDetailsResponse productDetailResponse = await _connection.queryProductDetails(productIdList.toSet()); LoadingUtil.hide(); if (productDetailResponse.error != null) { return null; } if (productDetailResponse.productDetails.isEmpty) { return null; } return productDetailResponse.productDetails; } void toCharge(List<ProductDetails> productDetailList, int selectIndex, BuildContext context) async { if (productDetailList == null) { ToastUtil.showRed("productDetailList为空"); return; } LoadingUtil.show(context); /// a异常ii步骤 bool needLock = await checkUndealPurshase(); LoadingUtil.hide(); if (needLock) { ToastUtil.showRed("有订单未处理"); return; } final PurchaseParam purchaseParam = PurchaseParam(productDetails:productDetailList[selectIndex]); InAppPurchaseConnection.instance.buyConsumable(purchaseParam: purchaseParam); } // return bool needLock Future<bool> checkUndealPurshase() async { /// a.异常i步骤，这里在进入app后，用户获取登录状态后调用 LogUtil.i(InappPurchaseService.sName, '获取未处理list'); try { List<PurchaseDetails> purchaseDetailsList = await _connection.getUndealPurchases(); if (purchaseDetailsList.isEmpty) return false; LogUtil.i(InappPurchaseService.sName, '处理数组最后一个'); PurchaseDetails purchaseDetails = purchaseDetailsList[purchaseDetailsList.length - 1]; return _verifyPurchase(purchaseDetails); } catch(e) { ToastUtil.showRed('同步苹果支付信息失败'); return true; } } ```