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

Question

我是 swift 新手，我正在实施 Cash Free Api，其流程是这样的

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

但我在展示 CFViewController 时遇到问题，它显示警告

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)

虽然参数是

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": ""
        ]
    }
    

请帮忙！

Answer 1

这样的警告读起来更好 -

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

看来你调用这个方法太早了——也许在viewDidLoad()

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 的警告。你能做的是——

1. 通过点击按钮发起此呼叫。 /// 推荐（与用户在应用中与之交互相同）
2. 将呼叫延迟一段时间，例如 0.5 秒 或 1 秒。 /// Lazy - 仅用于测试目的

这两者都将确保视图有足够的时间显示（在调用开始之前）并且警告会消失。