Stripe iOS SDK：每次查看付款方式屏幕时，都会创建新的客户ID吗？

Question

我正在使用Stripe iOS SDK创建客户并在我的应用程序中付款。话虽如此，我在Stripe文档（https://stripe.com/docs/mobile/ios/standard）中注意到，每次显示“付款方式”屏幕时，他们都会创建临时密钥（新客户）吗？我的用户的卡详细信息按原样保存，但问题出在 这行：

  

STPCustomerContext * customerContext = [[STPCustomerContext alloc]   initWithKeyProvider：[StripeAPIBackend sharedInstance]];

是我的用户每次选择查看其付款方式时，它们都不可见，因为每次点击按钮都会创建一个新的客户ID。有谁知道我该如何避免这种情况的发生？

ViewController.m

- (void)handlePaymentMethodsButtonTapped {

STPCustomerContext *customerContext = [[STPCustomerContext alloc] initWithKeyProvider:[StripeAPIBackend sharedInstance]];

    // Setup payment methods view controller
    STPPaymentMethodsViewController *paymentMethodsViewController = [[STPPaymentMethodsViewController alloc] initWithConfiguration:[STPPaymentConfiguration sharedConfiguration] theme:[STPTheme defaultTheme] customerContext:customerContext delegate:self];

    // Present payment methods view controller
    UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:paymentMethodsViewController];
    [self presentViewController:navigationController animated:YES completion:nil];



}

StripeAPIBackend.m

- (void)createCustomerKeyWithAPIVersion:(NSString *)apiVersion completion:(STPJSONResponseCompletionBlock)completion {

    NSString *email = @"test@test.com";

   AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];

   manager.responseSerializer = [AFJSONResponseSerializer serializerWithReadingOptions:NSJSONReadingAllowFragments];
    [manager POST:self.baseURL.absoluteString
       parameters:@{@"api_version": apiVersion, @"email": email}
        // progress:nil
          success:^(NSURLSessionDataTask *task, id responseObject) {
              completion(responseObject, nil);

          } failure:^(NSURLSessionDataTask *task, NSError *error) {
              completion(nil, error); 
          }];

}