I am using gemini2.5-flash with SwiftUI. How can I receive a response in JSON?

I implemented consumable in-app purchases in an iPhone app using ProductView(). When I tap the payment button in ProductView(), I am taken to the payment screen and once the payment is completed the next code seems to be executed, so there doesn't seem to be a problem, but if I tap the payment button in ProductView() again, the next code is executed without taking me to the payment screen. This means that a single payment can be made multiple times. Can someone help? ProductView(id: "geminiOneMatch") .productViewStyle(.compact) .padding() .onInAppPurchaseCompletion { product, result in if case .success(.success(_)) = result { // 課金が成功した場合の処理 gemini.addOneMatch(amount: 20) popUpVM.geminiOneMatchPopUp = false dataManageVM.generateRespons(locale: locale) } }

I am developing an iPhone and watch app with xcode. I bought a new Mac and when I tried to build it with xcode, I got the message "/Users/watanabekensuke/TennisData/TennisDataMax/TennisDataMax Watch App/headlinea-regular.ttf lstat(/Users/watanabekensuke/TennisData/TennisDataMax/TennisDataMax Watch App/headlinea-regular.ttf): No such file or directory (2)" and I couldn't build it. Can someone help me?

I implemented consumable in-app purchases in an iPhone app using StoreKit's ProductView(). When I tap the payment button in ProductView(), I am taken to the payment screen and once the payment is completed, the desired code appears to be executed, so there doesn't seem to be a problem, but when I tap the payment button in ProductView() again, the desired code is executed without being taken to the payment screen. So one payment can be used any number of times. I thought I wrote it exactly according to the reference, but will it be okay in a production environment? Is there any code that is necessary?