从paypal ios sdk swift获取运输地址和发票编号

Question

我在获取PayPal详细信息时遇到问题。 通过引用https://github.com/paypal/PayPal-iOS-SDK集成了payPal。

[("response"): {
    "create_time" = "2018-07-10T06:04:31Z";
    id = "PAY-54V16641NP848082ULNCEYTQ";
    intent = sale;
    state = approved;
}, ("response_type"): payment, ("client"): {
    environment = sandbox;
    "paypal_sdk_version" = "2.18.1";
    platform = iOS;
    "product_name" = "PayPal iOS SDK";
}]

和其他详细信息，例如

 intent = sale;\n        
 state = approved;\n    
 };\n    \"
 response_type\" = payment;\n}\n
 Details: (null)\n
 Shipping Address: (null)\n
 Invoice Number: (null)\n
 Custom: (null)\n
 Soft Descriptor: (null)\n
 Payee email: (null)\n
 BN code: (null)

为空。 为什么会出现空值？如何获取收款人姓名，电子邮件和其他详细信息？ 我是否应该向Paypal发送任何其他请求？