applePay 项目的配置和集成

确保你merchantID和对应的证书已生成（上一篇有讲述）
将你的AppID的applePay的功能打开，并更新PP文件

在工程的Capabilities中打开applePay的开关,merchantIDs选择之前申请的merchantID，如果不更新PP文件，step的第二个和第三个步骤过不去，会显示BundleID is unavailable,different string字样，我的pp文件是通配的，更新后依旧不能将apple pay entitlement 和applePay identifiers加入AppleID，无奈，我只能根据此appID重新生成pp文件

需要引入的头文件PassKit／PassKit.h
需要使用得类
（1）PKPaymentAuthorizationViewController该类是用来展示支付信息给用户看的VC，它有两个类方法，canMakePayments和canMakePaymentsUsingNetworks:分别是判断用户的设备/设备的系统版本是否支持applePay和用户是否绑定的了相应的银行卡，canMakePaymentsUsingNetworks后接的参数是一个数组，数组内放的是银行卡的类别，PKPaymentNetworkAmex美国运通卡，PKPaymentNetworkMasterCard万事达卡，PKPaymentNetworkVisa维萨卡，PKPaymentNetworkChinaUnionPay银联
（2）PKPaymentSummaryItem每一个item，比如商品总额，运费，优惠，应付总额等
PKPaymentSummaryItem *totalPrice = [PKPaymentSummaryItem summaryItemWithLabel:@”商品总额” amount:[NSDecimalNumber decimalNumberWithString:@”200”]];

PKPaymentSummaryItem *discount = [PKPaymentSummaryItem summaryItemWithLabel:@”优惠” amount:[NSDecimalNumber decimalNumberWithString:@”－20”]];

PKPaymentSummaryItem *ship = [PKPaymentSummaryItem summaryItemWithLabel:@”运费” amount:[NSDecimalNumber decimalNumberWithString:@”20”]];

PKPaymentSummaryItem *subtotal = [PKPaymentSummaryItem summaryItemWithLabel:@”应付总额” amount:[NSDecimalNumber decimalNumberWithString:@”200”]];

（3）PKPaymentRequest 支付请求
PKPaymentRequest *request = [[PKPaymentRequest alloc]init];
//国家编码
request.countryCode = @”CN”;
//货币编码
request.currencyCode = @”CNY”;
//绑定的卡
request.supportedNetworks = @[PKPaymentNetworkMasterCard,PKPaymentNetworkVisa,PKPaymentNetworkChinaUnionPay];
//自己申请的那个merchantID
request.merchantIdentifier = @”自己申请的那个merchantID”;
//这个具体做什么的不是特别清楚，反正是跟支持的交易相关的，前者是可选的，后者是必须支持的
request.merchantCapabilities = PKMerchantCapabilityEMV ｜ PKMerchantCapability3DS;
request.requiredShippingAddressFields = PKAddressFieldPostalAddress | PKAddressFieldPhone | PKAddressFieldEmail | PKAddressFieldName;
request.paymentSummaryItems = @[totalPrice，discount,ship,subtotal];
//用来展示支付信息
PKPaymentAuthorizationViewController *payment = [[PKPaymentAuthorizationViewController alloc]initWithPaymentRequest:request]
;
[self presentViewController:payment animated:YES completion:nil];
payment.delegate = self;//遵守PKPaymentAuthorizationViewControllerDelegate协议
（4）代理方法
- (void)paymentAuthorizationViewControllerDidFinish:(PKPaymentAuthorizationViewController *)controller{
[self dismissViewControllerAnimated:YES completion:nil];
}
- (void)paymentAuthorizationViewController:(PKPaymentAuthorizationViewController )controller didAuthorizePayment:(PKPayment )payment completion:(void (^)(PKPaymentAuthorizationStatus))completion{
completion(PKPaymentAuthorizationStatusSuccess);
跟后台的信息传输可以写在这里
}
另：
以上只是基本的需要的信息，如需有关于配送的信息，可用PKShippingMethod等类及相应的代理方法