类型MyViewController不符合协议'STPPaymentContextDelegate'

Question

我正在我的类上创建一个扩展，以符合协议'STPPaymentContextDelegate'。出于某种原因，编译器会抱怨，即使我已经将扩展中的所有方法都正确地声明了。

extension PaymentPopupViewController: STPPaymentContextDelegate { 

func paymentContext(_ paymentContext: STPPaymentContext, didFailToLoadWithError error: Error) { 
    self.delegate?.paymentPopupViewController(controller: self, didFinishPerhapsWithError: error as NSError?) 
} 

func paymentContextDidChange(_ paymentContext: STPPaymentContext) { 
    if paymentContext.loading { 
     self.indicatorView.startAnimating() 
    } else { 
     self.indicatorView.stopAnimating() 
     if paymentContext.selectedPaymentMethod == nil { 
      self.presentPaymentMehtodsViewController() 
     } 
    } 
    self.indicatorView.isHidden = !paymentContext.loading 
    self.paymentMethodLabel.isHidden = paymentContext.loading 
    self.changePaymentMethodButton.isEnabled = !paymentContext.loading 
    self.payButton.isEnabled = !paymentContext.loading && paymentContext.selectedPaymentMethod != nil 
    self.paymentMethodLabel.text = paymentContext.selectedPaymentMethod?.label 
} 

func paymentContext(_ paymentContext: STPPaymentContext, didCreatePaymentResult paymentResult: STPPaymentResult, completion: STPErrorBlock) { 
    fatalError("Method isn't implemented because our backend makes a charge, not the app.") 

} 

func paymentContext(_ paymentContext: STPPaymentContext, didFinishWith status: STPPaymentStatus, error: Error?) { 
    if status == .userCancellation { 
     return 
    } 
    self.delegate?.paymentPopupViewController(controller: self, didFinishPerhapsWithError: error as NSError?) 
} 

这里是委托方法，通过该协议规定：

@protocol STPPaymentContextDelegate <NSObject> 

- (void)paymentContext:(STPPaymentContext *)paymentContext didFailToLoadWithError:(NSError *)error; 
- (void)paymentContextDidChange:(STPPaymentContext *)paymentContext; 
- (void)paymentContext:(STPPaymentContext *)paymentContext 
didCreatePaymentResult:(STPPaymentResult *)paymentResult 
     completion:(STPErrorBlock)completion; 
- (void)paymentContext:(STPPaymentContext *)paymentContext 
didFinishWithStatus:(STPPaymentStatus)status 
      error:(nullable NSError *)error; 

我如何去有关解决此问题？

Answer 1

你的实现中有一些错误。

替换此

func paymentContext(_ paymentContext: STPPaymentContext, didFailToLoadWithError error: Error) 

随着

func paymentContext(_ paymentContext: STPPaymentContext, didFailToLoadWithError error: NSError) 

而更换此

func paymentContext(_ paymentContext: STPPaymentContext, didFinishWith status: STPPaymentStatus, error: Error?) 

随着

func paymentContext(_ paymentContext: STPPaymentContext, didFinishWithStatus status: STPPaymentStatus, error: NSError?)