ios - AddCardViewController 完成后不会消失

Question

我对 iOS 编程还很陌生，我被困在这里的这一小部分。

我基本上尝试在我的 iOS 应用程序中使用 Stripe。用户输入他们希望支付的金额，按“下一步”，然后输入他们的卡详细信息。到目前为止，所有这些都进展顺利 - 我可以显示 AddCardViewController，并输入他们的卡详细信息。

该代码可以一直验证卡 token 并接受付款；这很棒，但问题是 AddCardViewController 之后不会消失。

当我在演示中尝试它时，它工作得很好，但在我的应用程序上它根本不起作用!该应用程序只是卡在 AddCardViewController 上。点击取消不会执行任何操作，也不会显示消息，并且再次提交卡详细信息只会向用户收取双倍费用。

我做错了什么？

有关更多信息，这是我的代码:

StripeClient.shared.sendPostRequest(with: token, amount: amount, description: description) { result in
        switch result {
        // 1
        case .success:
            completion(nil)

            let alertController = UIAlertController(title: "Congrats",
                                                    message: "Your payment was successful!",
                                                    preferredStyle: .alert)
            let alertAction = UIAlertAction(title: "OK", style: .default, handler: { _ in
                self.navigationController?.popViewController(animated: true)
            })
            alertController.addAction(alertAction)
            self.present(alertController, animated: true)

            self.view.makeToast("Your payment was successful! We will be sending you a receipt to your email shortly.")
        // 2
        case .failure(let error):
            completion(error)
        }
    }

我提出了自定义发布请求，因为我无法让演示提供的请求正常工作，但我可以 100% 确定代码成功输入 case .success - 我测试过已经这样了。但为了以防万一，这是我的 .sendPostRequest 方法:

func sendPostRequest(with token: STPToken, amount: Double, description: String, completion: @escaping (Result) -> Void) {
    //declare parameter as a dictionary which contains string as key and value combination. considering inputs are valid

    let params: [String: Any] = [
        "stripeToken": token.tokenId,
        "amount": amount,
        "currency": Constants.defaultCurrency,
        "description": description
    ]

    //create the url with URL
    let url = URL(string: "<this-is-my-url.com>")! //change the url

    //create the session object
    let session = URLSession.shared

    //now create the URLRequest object using the url object
    var request = URLRequest(url: url)
    request.httpMethod = "POST" //set http method as POST

    do {
        request.httpBody = try JSONSerialization.data(withJSONObject: params, options: .prettyPrinted) // pass dictionary to nsdata object and set it as request body
    } catch let error {
        print(error.localizedDescription)
    }

    request.addValue("application/json", forHTTPHeaderField: "Content-Type")
    request.addValue("application/json", forHTTPHeaderField: "Accept")

    //create dataTask using the session object to send data to the server
    let task = session.dataTask(with: request as URLRequest, completionHandler: { data, response, error in

        guard error == nil else {
            return
        }

        guard let data = data else {
            return
        }

        do {
            //create json object from data
            //print(data)
            if let json = try JSONSerialization.jsonObject(with: data, options: .mutableContainers) as? [String: Any] {
                //print(json)
                // handle json...
                //print(json["response"]!)

                if let responseString = try json["response"] as? String {
                    if responseString == "SUCCESS" {
                        completion(Result.success)
                    } else {
                        completion(Result.failure(IntParsingError.overflow))
                    }
                }
            }
        } catch let error {
            print(error.localizedDescription)
        }
    })
    task.resume()
}

我真的非常非常感谢您的帮助!

Answer 1

1-你需要

DispatchQueue.main.async {
     completion(Result.success)
}

作为 session.dataTask(with: 在后台线程中运行

2-为此运行

self.navigationController?.popViewController(animated: true)

验证 vc 是否嵌入到导航中，并且您使用前一个 vc 的 push 而不是 present 函数来呈现它

编辑:

当你展示时

self.dismiss(animated: true, completion: nil)