swift - 以编程方式填充 STPPaymentCardTextField答案

【问题标题】：swift - Populate STPPaymentCardTextField Programmaticallyswift - 以编程方式填充 STPPaymentCardTextField
【发布时间】：2015-12-13 02:43:27
【问题描述】：

我正在开发一个应用程序并使用 Stripe SDK 和 Card.io SDK。我想要发生的是用Card.io 扫描的信用卡值填充STPPaymentCardTextField 卡号、到期月份和年份。我试过了：

var paymentField = STPPaymentCardTextField()

func userDidProvideCreditCardInfo(cardInfo: CardIOCreditCardInfo!, inPaymentViewController paymentViewController: CardIOPaymentViewController!) {
    var scanViewController: CardIOPaymentViewController = CardIOPaymentViewController(paymentDelegate: self)
    paymentField.cardNumber = cardInfo.cardNumber
    paymentField.expirationMonth = cardInfo.expiryMonth
    paymentField.expirationYear = cardInfo.expiryYear

    paymentViewController.dismissViewControllerAnimated(true, completion: nil)
}

对于每个 paymentField 附加，我都有一个错误 Cannot assign to the result of this expression。你觉得我能用这个做什么？谢谢！

【问题讨论】：

是吗？我看不出它不应该工作的任何原因......你到底有什么问题？
对于每个 paymentField 追加，我都有一个错误 Cannot assign to the result of this expression。

标签： swift stripe-payments card.io

【解决方案1】：

STPPaymentCardTextField 字段是只读的，您只能从这些属性中“获取”。

STPPaymentCardTextField 用于收集信用卡详细信息。在您的情况下，您已经在使用 CardIOCreditCardInfo 执行此操作。获得信用卡详细信息后，您可以将数据组装到 STPCardParams 对象中。

收集卡号、有效期和 CVC 后，将它们打包到 STPCardParams 对象中并调用 STPAPIClient 类的 createTokenWithCard: 方法。

现在你的方法可能看起来像这样......

func userDidProvideCreditCardInfo(cardInfo: CardIOCreditCardInfo!, inPaymentViewController paymentViewController: CardIOPaymentViewController!) {

        let card: STPCardParams = STPCardParams()
        card.number = info.cardNumber
        card.expMonth = info.expiryMonth
        card.expYear = info.expiryYear
        card.cvc = info.cvv

        STPAPIClient.sharedClient().createTokenWithCard(card, completion: {(result, error) -> Void in
            if error == nil {
                // Either save the card token with your customer data or charge them right away
                //createBackendChargeWithToken(token)
            }
            else {
                //handleError(error)
            }
        })
    }
    paymentViewController?.dismissViewControllerAnimated(true, completion: nil)
}

更新可能是您问题的正确答案。

import Stripe
class PaymentCardEditorField: STPPaymentCardTextField {
    func setExistingCard(card: STPCardParams) {
        replaceField("numberField", withValue: card.number!)
        replaceField("expirationField", withValue: String(format: "%02d/%02d", card.expMonth, (card.expYear % 100)))
        replaceField("cvcField", withValue: card.cvc!)
    }

    func replaceField(memberName: String, withValue value: String) {
        let field = self.valueForKey(memberName) as! UITextField
        let delegate = self as! UITextFieldDelegate
        let len = field.text?.characters.count
        if delegate.textField?(field, shouldChangeCharactersInRange: NSMakeRange(0, len!), replacementString: value) ?? false {
        field.text = value
        }
    }
}

然后调用setExistingCard

func userDidProvideCreditCardInfo(cardInfo: CardIOCreditCardInfo!, inPaymentViewController paymentViewController: CardIOPaymentViewController!) {

    let card: STPCardParams = STPCardParams()
    card.number = info.cardNumber
    card.expMonth = info.expiryMonth
    card.expYear = info.expiryYear
    card.cvc = info.cvv
    paymentTextField.setExistingCard(card)
}

像魅力一样工作。

关注此线程以获取 Stripe SDK 的潜在更新，以便在未来获得内置支持。

https://github.com/stripe/stripe-ios/issues/127

【讨论】：

【解决方案2】：

我得到了一个更清晰的答案from here

let cardParams = STPCardParams()
cardParams.number = "4242424242424242"
cardParams.expMonth = 07 // this data type is UInt and *not* Int
cardParams.expYear = 19 // this data type is UInt and *not* Int
cardParams.cvc = "123"

let paymentField = STPPaymentCardTextField()
paymentField.cardParams = cardParams //the paymentTextField will now show the cc #, exp, and cvc from above

您可以获取其他测试卡号，例如 Mastercard、Amex 和 Discover from here from Stripe

【讨论】：