1、申请开放平台账号，并添加应用

2、开通支付功能

3、配置支付宝的公钥

4、开始APP集成

1）导入需要的依赖包

2）创建桥接文件导入支付宝的SDK

#import <AlipaySDK/AlipaySDK.h>

3）创建支付结果处理类AliSdkManager

PaymentType.ALIPAY  支付方式
PaymentResult  自定义支付结果

import UIKit
public class AliSdkManager: NSObject {
    public static var aliSdkManager:AliSdkManager!
    internal var orderPayController:OrderPayController!
    
    public static func sharedManager () -> AliSdkManager{
        AliSdkManager.aliSdkManager = AliSdkManager.init()
        return AliSdkManager.aliSdkManager
    }
    internal func showResult(result:NSDictionary){
//        9000  订单支付成功
//        8000  正在处理中
//        4000  订单支付失败
//        6001  用户中途取消
//        6002  网络连接出错
        let returnCode:String = result["resultStatus"] as! String
        var returnMsg:String = result["memo"] as! String
        var subResultMsg:String = ""
        switch  returnCode{
        case "6001":
            break
        case "8000":
            orderPayController.paySuccess(PaymentType.ALIPAY, payResult: PaymentResult.PROCESS)
            break
        case "4000":
            orderPayController.paySuccess(PaymentType.ALIPAY, payResult: PaymentResult.FAIL)
            break
        case "9000":
            returnMsg = "支付成功"
            //支付返回信息：外系统订单号、内部系统订单号等信息
            JSON.init(parseJSON: (result["result"] as! String))["alipay_trade_app_pay_response"]["sub_msg"].stringValue
            orderPayController.paySuccess(PaymentType.ALIPAY, payResult: PaymentResult.SUCCESS)
            break
        default:
            break
        }
    }
}

4）创建支付工具类AliPayUtils，用于调起支付

import UIKit
public class AliPayUtils: NSObject {
    var context:UIViewController;

    public init(context:UIViewController) {
        self.context = context;
    }
    
    public func pay(sign:String){
        let decodedData = sign.data(using: String.Encoding(rawValue: String.Encoding.utf8.rawValue))!
        let decodedString:String = (NSString(data: decodedData, encoding: String.Encoding.utf8.rawValue))! as String
 
        AlipaySDK.defaultService().payOrder(decodedString, fromScheme: "com.xmars.porsche.m2m", callback: { (resp) in
            print(resp)
        } )  
    }
}

5）在AppDelegate.swift的方法：

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool
添加代码：

//初始化支付管理类
 AliSdkManager.sharedManager()

6）在AppDelegate.swift文件中重写方法

    func application(_ app: UIApplication, open url: URL, options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
        if url.host == "safepay" {
            AlipaySDK.defaultService().processOrder(withPaymentResult: url as URL!, standbyCallback: {
                (resultDic) -> Void in
                  //调起支付结果处理
                AliSdkManager.aliSdkManager.showResult(result: resultDic! as NSDictionary);
            })
        }
        return true;
    }

7）点击工程文件中Info

此处的Url Schemes 需要和AliPayUtils中支付方法的fromScheme一样的，否则可能回调失败

 AlipaySDK.defaultService().payOrder(decodedString, fromScheme: "com.xmars.porsche.m2m", callback: { (resp) in
            print(resp)
        } )  

8）页面调起支付

注：此处所有数据为测试数据

alipayUtils = AliPayUtils.init(context: self);
AliSdkManager.aliSdkManager.orderPayController = self
alipayUtils.pay(sign: "app_id=20177383904816397&method=alipay.trade.app.pay&charset=utf-8&sign_type=RSA2&timestamp=2017-06-30 

支付宝集成差不多就这样啦！！！

备注： 文中OrderPayController 为自定义的支付页面，
支付宝版本为2017-06-10