PKPaymentAuthorizationViewController 此類彈出apple pay檢視控制器。

+ (BOOL)canMakePayments;// 裝置是否能進行applepay支付
+ (BOOL)canMakePaymentsUsingNetworks:(NSArray<PKPaymentNetwork> *)supportedNetworks;
+ (BOOL)canMakePaymentsUsingNetworks:(NSArray<PKPaymentNetwork> *)supportedNetworks capabilities:(PKMerchantCapability)capabilties;

PKPaymentNetwork // 支付系統
{
    PKPaymentNetworkAmex API_AVAILABLE(ios(8.0), watchos(3.0)); // 美國運通卡
    PKPaymentNetworkCartesBancaires API_AVAILABLE(ios(11.2), watchos(4.2));
    PKPaymentNetworkChinaUnionPay API_AVAILABLE(ios(9.2), watchos(3.0)); // 中國銀聯卡
    PKPaymentNetworkDiscover API_AVAILABLE(ios(9.0), watchos(3.0)); // 發現卡
    PKPaymentNetworkIDCredit API_AVAILABLE(ios(10.3), watchos(3.2));
    PKPaymentNetworkInterac API_AVAILABLE(ios(9.2), watchos(3.0));
    PKPaymentNetworkJCB API_AVAILABLE(ios(10.1), watchos(3.1));
    PKPaymentNetworkMasterCard API_AVAILABLE(ios(8.0), watchos(3.0)); // 萬事達卡
    PKPaymentNetworkPrivateLabel API_AVAILABLE(ios(9.0), watchos(3.0)); // 信用卡和借記卡
    PKPaymentNetworkQuicPay API_AVAILABLE(ios(10.3), watchos(3.2));
    PKPaymentNetworkSuica API_AVAILABLE(ios(10.1), watchos(3.1));
    PKPaymentNetworkVisa // 維薩卡
}

PKMerchantCapability // 商家支付能力
{
    PKMerchantCapability3DS                                  = 1UL << 0,   // 3DS卡
    PKMerchantCapabilityEMV                                  = 1UL << 1,   // EMV卡
    PKMerchantCapabilityCredit NS_ENUM_AVAILABLE_IOS(9_0) = 1UL << 2,   // 信用卡
    PKMerchantCapabilityDebit  NS_ENUM_AVAILABLE_IOS(9_0) = 1UL << 3    // 借記卡
}

// 指定初始化方法
- (nullable instancetype)initWithPaymentRequest:(PKPaymentRequest *)request NS_DESIGNATED_INITIALIZER;

@property (nonatomic, assign, nullable) id<PKPaymentAuthorizationViewControllerDelegate> delegate;

{
// 支付完成回撥 負責dismiss控制器
- (void)paymentAuthorizationViewControllerDidFinish:(PKPaymentAuthorizationViewController *)controller;

@optional

// 8.3後可用
    /*將要去支付*/
- (void)paymentAuthorizationViewControllerWillAuthorizePayment:(PKPaymentAuthorizationViewController *)controller;

// 11.0後可用
    /*付款成功蘋果伺服器返回資訊回撥，做伺服器驗證*/
- (void)paymentAuthorizationViewController:(PKPaymentAuthorizationViewController *)controller
                       didAuthorizePayment:(PKPayment *)payment
                                   handler:(void (^)(PKPaymentAuthorizationResult *result))completion;
    /*送貨方式回撥*/
- (void)paymentAuthorizationViewController:(PKPaymentAuthorizationViewController *)controller
                   didSelectShippingMethod:(PKShippingMethod *)shippingMethod
                                   handler:(void (^)(PKPaymentRequestShippingMethodUpdate *update))completion;
    /*送貨地址回撥*/
- (void)paymentAuthorizationViewController:(PKPaymentAuthorizationViewController *)controller
                  didSelectShippingContact:(PKContact *)contact
                                   handler:(void (^)(PKPaymentRequestShippingContactUpdate *update))completion;
    /*支付方式回撥*/
- (void)paymentAuthorizationViewController:(PKPaymentAuthorizationViewController *)controller
                    didSelectPaymentMethod:(PKPaymentMethod *)paymentMethod
                                   handler:(void (^)(PKPaymentRequestPaymentMethodUpdate *update))completion;

PKPaymentRequestUpdate
{
    PKPaymentAuthorizationResult
    PKPaymentRequestUpdate
    {
        PKPaymentRequestShippingMethodUpdate
        PKPaymentRequestShippingContactUpdate
        PKPaymentRequestPaymentMethodUpdate
    }
}

// 11.0後被廢棄的方法 分別對應上面四個方法
- (void)paymentAuthorizationViewController:(PKPaymentAuthorizationViewController *)controller
                       didAuthorizePayment:(PKPayment *)payment
                                completion:(void (^)(PKPaymentAuthorizationStatus status))completion;

- (void)paymentAuthorizationViewController:(PKPaymentAuthorizationViewController *)controller
                   didSelectShippingMethod:(PKShippingMethod *)shippingMethod
                                completion:(void (^)(PKPaymentAuthorizationStatus status, NSArray<PKPaymentSummaryItem *> *summaryItems))completion;

- (void)paymentAuthorizationViewController:(PKPaymentAuthorizationViewController *)controller
                  didSelectShippingContact:(PKContact *)contact
                                completion:(void (^)(PKPaymentAuthorizationStatus status, NSArray<PKShippingMethod *> *shippingMethods, NSArray<PKPaymentSummaryItem *> *summaryItems))completion;

- (void)paymentAuthorizationViewController:(PKPaymentAuthorizationViewController *)controller
                    didSelectPaymentMethod:(PKPaymentMethod *)paymentMethod
                                completion:(void (^)(NSArray<PKPaymentSummaryItem *> *summaryItems))completion;