尝试在视图不在窗口层次结构中的<UINavigationController>上显示<CFSDK.CFViewController>

Question

我是swift的新手，我正在实施无现金Api，其流程如下

https://dev.cashfree.com/payment-gateway/integrations/mobile-integration/ios

但我在演示CFViewController时遇到了问题，它显示了警告

Attempt to present <CFSDK.CFViewController> on <UINavigationController> whose view is not in the window hierarchy!

我的代码是这样的

CFPaymentService().doWebCheckoutPayment(
                        params: self.getPaymentParams(),
                        env: "PROD",
                        callback: self)

而参数是

func getPaymentParams() -> Dictionary<String, Any> {
        return [
            "orderId": OrderIdForCashFree,
            "appId": CashFreeAPIKeyFromServer,
            "tokenData" : cftoken,
            "orderAmount": AmountExpectedforServer,
            "customerName": customerNameCashFree,
            "orderNote": orderNoteCashFree,
            "orderCurrency": "INR",
            "customerPhone": customerPhoneCashFree,
            "customerEmail": customerEmailCashFree,
            "notifyUrl": ""
        ]
    }

请帮帮我！

Answer 1

警告看起来更好，就像这样-

Attempt to present <CFSDK.CFViewController> 
on <UINavigationController>
whose view is not in the window hierarchy!

看起来您调用这个方法太早了--可能是在viewDidLoad()中

CFPaymentService().doWebCheckoutPayment(
    params: self.getPaymentParams(),
    env: "PROD",
    callback: self
)

如果视图尚未正确设置，您将收到来自UIKit的此警告。你能做的是-

1. 通过按键启动此呼叫。/推荐(与用户在应用程序中进行交互时相同)
2. 将呼叫延迟一段时间，例如0.5秒或1秒。/惰性-仅用于测试目的

这两个都将确保视图有足够的时间显示(在呼叫发起之前)，并且警告将消失。