Swift银联支付及ApplePay开发

银联控件接入流程:

银联控件接入流程

根据提供的流程图，作为app端，我们需要做的四件事如下：
1.调用后端的接口传入参数发起订单请求，并接收tn

2.调银联的startpay方法

startpay

3.实现UPAPayPluginDelegate的方法，根据result处理逻辑

回调处理

以上，就是银联sdk的集成，在此之前需要去银联官网注册登录完善商户信息，大概需要两三个工作日就好，第6步需要一点时间，但是等就行了。

官网注册地址：https://open.unionpay.com/tjweb/index
demo地址：https://open.unionpay.com/ajweb/help/file/techFile?productId=80

image.png

银联的集成可以说是非常简单的，下面介绍一下原生iOS支付处理；

直接上代码：

// MARK: - applepay原生支付
extension Demo: PKPaymentAuthorizationViewControllerDelegate  {
    
    func payaction(){
        let request = PKPaymentRequest()
        if #available(iOS 9.2, *) {
            request.supportedNetworks = [PKPaymentNetwork.amex, PKPaymentNetwork.masterCard, PKPaymentNetwork.visa, PKPaymentNetwork.chinaUnionPay]
        } else {
            request.supportedNetworks = [PKPaymentNetwork.amex, PKPaymentNetwork.masterCard, PKPaymentNetwork.visa]
        }
        
        if PKPaymentAuthorizationViewController.canMakePayments(usingNetworks: request.supportedNetworks) {
            noticeOnlyText("可以支付，开始建立支付请求")
            
            request.countryCode = "CN"
            request.currencyCode = "CNY"
            request.merchantIdentifier = "merchant.com.xxxx"
            request.merchantCapabilities = PKMerchantCapability.capability3DS
            
            
            let wax = PKPaymentSummaryItem(label: "订单金额", amount: NSDecimalNumber(string: "\(self.allPrice)"))
            let total = PKPaymentSummaryItem(label: "xxx", amount: wax.amount)
            
            request.paymentSummaryItems = [wax, total]
            
            let vc = PKPaymentAuthorizationViewController(paymentRequest: request)
            vc?.delegate = self
            present(vc!, animated: true, completion: nil)
        }
        else {
            noticeOnlyText("您没有绑定任何银行卡或者当前设备不支持ApplePay")
        }
    }
    
    func paymentAuthorizationViewControllerDidFinish(_ controller: PKPaymentAuthorizationViewController) {
        noticeOnlyText("支付结束")
        dismiss(animated: true, completion: nil)

    }
    
    func paymentAuthorizationViewController(_ controller: PKPaymentAuthorizationViewController, didAuthorizePayment payment: PKPayment, completion: @escaping (PKPaymentAuthorizationStatus) -> Void) {
        // 调后端接口返回success或者fail
        completion(PKPaymentAuthorizationStatus.success)
        
        //订单ID 暂时
        let vc = KeMyTicketVc.init(orderId: "")
        navigationController?.pushViewController(vc, animated: true)
    }
}