swift项目中用到paypal支付,看到网上关于paypal的资料很少,而且基本都是OC的,于是记录下来项目中用到的swift版.

链接参考

object-C paypal集成:
http://www.jianshu.com/p/812d9f010b5b

本文作者项目中paypal使用cocoapods导入的,cocoapods使用方法:
http://www.jianshu.com/p/b64b4fd08d3c

因为paypal目前没有swift版,所以目前会用到桥接文件,
桥接方法链接:
http://www.jianshu.com/p/c399297f3869

假若已经建好桥接文件,在其加入
#import <PayPalMobile.h>

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1.在AppDelegate.swift的
didFinishLaunchingWithOptions方法中添加以下代码:

PayPalMobile.initializeWithClientIds(forEnvironments: [PayPalEnvironmentProduction : "你的真实交易模式ClientID",PayPalEnvironmentSandbox : "你的沙盒交易模式ClientID"])

2.在需要paypal的控制器中添加代理
PayPalPaymentDelegate

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@IBAction func submitAmountBtn(_ sender: AnyObject) {
guard let num=Double(amountTextField.text ?? "") else {
           print("不能为空")
           return
       }

       //print("num ===\(num)")

       //为保留小数点后两位
       let payamount = NSString(format: "%.2f", num)
       //将double转为String
       let payamount = NSString(format: "%.2f", payamount1!)
   
       var payment=PayPalPayment()
       payment=PayPalPayment.init()
       payment.amount = NSDecimalNumber.init(string: payamount as String)
       print("payment.amount=\(payment.amount)")
       payment.currencyCode="SGD"
       payment.shortDescription="CashLess"
       payment.intent=PayPalPaymentIntent.sale
       if !payment.processable {
           // If, for example, the amount was negative or the shortDescription was empty, then
           // this payment would not be processable. You would want to handle that here.
       }

       //设置代理
       var paymentViewController = PayPalPaymentViewController()
       paymentViewController = PayPalPaymentViewController.init(payment: payment, configuration: payPalConfiguration, delegate: self as PayPalPaymentDelegate)!
       self.present(paymentViewController, animated: true, completion: nil)       
   }
//配置支付相关信息
required init?(coder aDecoder: NSCoder) {
       super.init(coder: aDecoder)
       payPalConfiguration=PayPalConfiguration.init()
       payPalConfiguration.acceptCreditCards = false
       payPalConfiguration.payPalShippingAddressOption = PayPalShippingAddressOption.payPal
   }
//设置(测试或正式)环境
   override func viewWillAppear(_ animated: Bool) {
       super.viewWillAppear(animated)
       PayPalMobile.preconnect(withEnvironment: PayPalEnvironmentNoNetwork)
       
   }

实现PayPalPaymentDelegate代理方法

 func payPalPaymentDidCancel(_ paymentViewController: PayPalPaymentViewController) {
        self.dismiss(animated: true, completion: nil)
        
    }
    //pragma mark Proof of payment validation 验证
    func payPalPaymentViewController(_ paymentViewController: PayPalPaymentViewController, didComplete completedPayment: PayPalPayment) {
        //调用下面的方法用于验证
self.vertifyCompletedPayment(completedPayment: completedPayment)
        self.dismiss(animated: true, completion: nil)
    }

    func vertifyCompletedPayment(completedPayment:PayPalPayment) {
       //将该数据传入服务器进行验证
//验证成功后执行更新方法
            }