1，补充上个修改

Mobile Buy SDK/Mobile Buy SDK/Data/BUYClient+Checkout.h

@@ -142,7 +142,7 @@ typedef void (^BUYDataGiftCardBlock)(BUYGiftCard * _Nullable giftCard, NSError *
  *
  *  @return The associated BUYOperation
  */
-- (BUYOperation *)completeCheckoutWithToken:(nullable NSString *)checkoutToken paymentToken:(_Nullable id<BUYPaymentToken>)paymentToken completion:(BUYDataCheckoutBlock)block;
+- (BUYOperation *)completeCheckoutWithToken:(nullable NSString *)checkoutToken paymentToken:(_Nullable id<BUYPaymentToken>)paymentToken completion:(BUYCheckoutOperationCompletion)block;
 
 /**
  *  Retrieve the status of a checkout with token. This checks the status of the current payment processing job for the provided checkout.

Mobile Buy SDK/Mobile Buy SDK/Data/BUYClient+Checkout.m

@@ -105,7 +105,7 @@
 
 - (BUYOperation *)completeCheckoutWithToken:(NSString *)checkoutToken paymentToken:(id<BUYPaymentToken>)paymentToken completion:(BUYCheckoutOperationCompletion)block
 {
-	BUYCheckoutOperationCompletion *operation = [BUYCheckoutOperationCompletion operationWithClient:self checkoutToken:checkoutToken token:paymentToken completion:block];
+	BUYCheckoutOperation *operation = [BUYCheckoutOperation operationWithClient:self checkoutToken:checkoutToken token:paymentToken completion:block];
 	[self startOperation:operation];
 	return operation;
 }