首先得在https://developer.apple.com/ 进行相关配置：
Certificates, Identifiers & Profiles——Identifiers
先配置：Merchant IDs，再配置：iOS App IDs，完成后下载并安装证书。

完成后在工程目录TARGETS——Capabilities中打开Apple Pay开关，

Paste_Image.png

上图状态表示配置成功。

接下来就是代码集成了，也是比较简单的，就直接上代码了：

#import "ViewController.h"
#import <PassKit/PassKit.h>

@interface ViewController ()<PKPaymentAuthorizationViewControllerDelegate>

@property (weak, nonatomic) IBOutlet UIView *payView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    // 1、判断设备是否支持Apple Pay
    if (![PKPaymentAuthorizationViewController canMakePayments]) {
        NSLog(@"当前设备不支持Apple Pay");
        self.payView.hidden = YES;
    } else if (![PKPaymentAuthorizationController canMakePaymentsUsingNetworks:@[PKPaymentNetworkChinaUnionPay,PKPaymentNetworkVisa]]) {
        // 2、创建一个跳转按钮，进入添加银行卡界面
        PKPaymentButton *btn = [PKPaymentButton buttonWithType:PKPaymentButtonTypeSetUp style:PKPaymentButtonStyleWhiteOutline];
        [btn addTarget:self action:@selector(jump) forControlEvents:UIControlEventTouchUpInside];
        [self.payView addSubview:btn];
    } else {
        // 3、创建支付按钮
        PKPaymentButton *btn = [PKPaymentButton buttonWithType:PKPaymentButtonTypeBuy style:PKPaymentButtonStyleBlack];
        [btn addTarget:self action:@selector(buy) forControlEvents:UIControlEventTouchUpInside];
        [self.payView addSubview:btn];
    }
}

- (void)jump {
    PKPassLibrary *pl = [[PKPassLibrary alloc]init];
    [pl openPaymentSetup];
}

- (void)buy {
    // 授权成功
    NSLog(@"授权成功，开始支付");
    // 1、配置支付请求
    PKPaymentRequest *requrst = [[PKPaymentRequest alloc]init];
    // 1.1 配置支付请求
    // 1.1.1 配置商户ID
    requrst.merchantIdentifier = @"merchant.com.PJ.ApplePay.ApplePayDemo";
    // 1.1.2 设置国家代码及货币码
    requrst.countryCode = @"CN";
    requrst.currencyCode = @"CNY";
    // 1.1.3 设置支持的支付网络（方式）
    requrst.supportedNetworks = @[PKPaymentNetworkChinaUnionPay,PKPaymentNetworkVisa];
    // 1.1.4 设置商户处理方式  苹果要求3DS必须支持，可多选
    requrst.merchantCapabilities = PKMerchantCapability3DS;
    // 1.1.5 配置购买的商品列表
    NSDecimalNumber *price = [[NSDecimalNumber alloc]initWithString:@"0.1"];
    PKPaymentSummaryItem *item = [PKPaymentSummaryItem summaryItemWithLabel:@"iPhone 7" amount:price];
    requrst.paymentSummaryItems = @[item];
    
    // 1.2 配置请求附加信息
    // 是否显示发票收货地址
    requrst.requiredBillingAddressFields = PKAddressFieldAll;
    // 是否显示商品收货地址
    requrst.requiredShippingAddressFields = PKAddressFieldAll;
    // 配置快递方式  可多个
    NSDecimalNumber *price1 = [[NSDecimalNumber alloc]initWithString:@"0"];
    PKShippingMethod *mothod = [PKShippingMethod summaryItemWithLabel:@"顺丰快递" amount:price1];
    mothod.detail = @"24小时送达";
    mothod.identifier = @"shunfeng";
    requrst.shippingMethods = @[mothod];
    // 配置快递类型
    requrst.shippingType = PKShippingTypeStorePickup;
    
    // 1.3 添加一些附加数据
//    requrst.applicationData = 
    
    // 2、验证用户支付授权
    PKPaymentAuthorizationViewController *payVC = [[PKPaymentAuthorizationViewController alloc]initWithPaymentRequest:requrst];
    payVC.delegate = self;
    [self presentViewController:payVC animated:YES completion:nil];
}

#pragma mark - PKPaymentAuthorizationViewControllerDelegate
// 授权成功
// 参数一 授权控制器
// 参数二 支付对象
// 参数三 系统给的回调代码块，通过这个代码块来确认支付是否成功了
- (void)paymentAuthorizationViewController:(PKPaymentAuthorizationViewController *)controller didAuthorizePayment:(PKPayment *)payment completion:(void (^)(PKPaymentAuthorizationStatus))completion {
    
    BOOL isSucess = YES;
    if (isSucess) {
        completion(PKPaymentAuthorizationStatusSuccess);
    } else {
        completion(PKPaymentAuthorizationStatusSuccess);
    }
}

- (void)paymentAuthorizationViewControllerDidFinish:(PKPaymentAuthorizationViewController *)controller {
    NSLog(@"授权失败");
    [self dismissViewControllerAnimated:YES completion:nil];
}

@end