作品链接：
http://www.jianshu.com/users/1e0f5e6f73f6/top_articles

1.导入第三方框架和设置支付界面

#import <PassKit/PassKit.h>
@interface ViewController ()<PKPaymentAuthorizationViewControllerDelegate>
/**支付view */
@property (weak, nonatomic) IBOutlet UIView *payView;
@end

2.设置支付框架

- (void)viewDidLoad {
    [super viewDidLoad];
    
    // 1.判断当前设备是否是支付苹果支付
    if (![PKPaymentAuthorizationViewController canMakePayments]) {
        NSLog(@"当前设备不支持APPlepay");
        self.payView.hidden = YES;
        // 判断是否添加了银行卡 PKPaymentNetworkChinaUnionPay 银联卡，在iOS9.2才支持
    } else if (![PKPaymentAuthorizationViewController canMakePaymentsUsingNetworks:@[PKPaymentNetworkVisa, PKPaymentNetworkChinaUnionPay]]){
        // 创建一个跳转按钮，当用户点击按钮时，跳转到添加银行卡界面
        PKPaymentButton *button = [PKPaymentButton buttonWithType:PKPaymentButtonTypeSetUp style:PKPaymentButtonStyleWhiteOutline];
        [button addTarget:self action:@selector(addCard) forControlEvents:UIControlEventTouchUpInside];
        [self.payView addSubview:button];
    } else {
        // 创建一个购买按钮，当用户点击按钮时，购买一个商品
        PKPaymentButton *button = [PKPaymentButton buttonWithType:PKPaymentButtonTypeBuy style:PKPaymentButtonStyleBlack];
        [button addTarget:self action:@selector(buy) forControlEvents:UIControlEventTouchUpInside];
    }  
}

3.添加银联卡设置

// 跳转到添加银行卡界面 添加银行卡需在真机，模拟器不行
- (void)addCard
{
    PKPassLibrary *pl = [[PKPassLibrary alloc] init];
    [pl openPaymentSetup];
}

4.购买商品

// 购买商品
- (void)buy
{
    NSLog(@"购买商品");
    
    // 1.创建一个请求支付
    PKPaymentRequest *request = [[PKPaymentRequest alloc] init];
    // 2.配置支付请求
    //   2.1配置商家ID
    request.merchantIdentifier = @"商家ID";
    
    //   2.2配置货币代码，以及国家代码
    request.countryCode = @"CN";
    request.currencyCode = @"CNY";
    
    //   2.3配置请求支持的网络
    request.supportedNetworks = @[PKPaymentNetworkVisa, PKPaymentNetworkChinaUnionPay];
    
    //   2.4配置商户的处理方式
    request.merchantCapabilities = PKMerchantCapability3DS;
    //   2.5配置购买的商品列表
    NSDecimalNumber *price = [NSDecimalNumber decimalNumberWithString:@"100.00"];
    PKPaymentSummaryItem *item1 = [PKPaymentSummaryItem summaryItemWithLabel:@"保温杯" amount:price];
    NSDecimalNumber *prices = [NSDecimalNumber decimalNumberWithString:@"100.00"];
    PKPaymentSummaryItem *item2 = [PKPaymentSummaryItem summaryItemWithLabel:@"商家" amount:prices];
    //   注意：支付列表最后一个，代表汇总
    request.paymentSummaryItems = @[item1, item2];
    
    // 3.配置请求的附加项
    //   3.1是否显示发票收货地址，显示哪些选项
    request.requiredBillingAddressFields = PKAddressFieldAll;
    //   3.2是否显示快递地址，显示哪些选项
    request.requiredShippingAddressFields = PKAddressFieldAll;
    
    // 4.配置快递方式
    //   4.1快递费用
    NSDecimalNumber *p1 = [NSDecimalNumber decimalNumberWithString:@"15.00"];
    PKShippingMethod *method = [PKShippingMethod summaryItemWithLabel:@"顺风快递" amount:p1];
    method.detail = @"送货上门";
    method.identifier = @"shunfeng";
    request.shippingMethods = @[method];
    //   4.2配置快递的类型
    request.shippingType = PKShippingTypeStorePickup;
    
    //   4.3添加一些附加数据
    request.applicationData = [@"buyID=123456789" dataUsingEncoding:NSUTF8StringEncoding];
    
    // 5.验证用户的支付授权
    PKPaymentAuthorizationViewController *avc = [[PKPaymentAuthorizationViewController alloc] initWithPaymentRequest:request];
    avc.delegate = self;// 注意：需遵守PKPaymentAuthorizationViewControllerDelegate方法
    [self presentViewController:avc animated:YES completion:nil];
}

5.代理方法

#pragma mark - PKPaymentAuthorizationViewControllerDelegate方法
/**
 *  如果用户授权成功，就会调用这个方法
 *
 *  @param controller 授权控制器
 *  @param payment    支付对象
 *  @param completion 系统给定的一个回调代码块，来告诉系统当前的支付状态是否是成功
 */
- (void)paymentAuthorizationViewController:(PKPaymentAuthorizationViewController *)controller
                       didAuthorizePayment:(PKPayment *)payment
                                completion:(void (^)(PKPaymentAuthorizationStatus status))completion
{
    // 一般在此处，拿到支付信息，发送给服务器，处理完毕之后，服务器返回一个状态，告诉客户端是否支持成功，然后客户端进行处理
    BOOL isSucess = YES;
    if (isSucess) {
        completion(PKPaymentAuthorizationStatusSuccess);
    } else {
        completion(PKPaymentAuthorizationStatusFailure);
    }
}

// 当用户授权结束，或者取消授权时调用
- (void)paymentAuthorizationViewControllerDidFinish:(PKPaymentAuthorizationViewController *)controller
{
    NSLog(@"授权结束");
    [self dismissViewControllerAnimated:controller completion:nil];
}