iOS应用内外购买订阅的方式

1. 使用网页进行订阅购买，并在应用内同步订阅信息。

示例代码：

//打开订阅购买页面 if let url = URL(string: "https://example.com/subscribe") { UIApplication.shared.open(url, options: [:], completionHandler: nil) }

//同步订阅信息 if let subscription = fetchSubscriptionFromServer() { //保存订阅信息，例如到UserDefaults中 UserDefaults.standard.set(subscription.rawValue, forKey: "subscriptionStatus")

//发送订阅信息变化通知
NotificationCenter.default.post(name: Notification.Name("SubscriptionDidChange"), object: nil)

}

2. 使用App Store Connect提供的API进行订阅管理和验证。

示例代码：

//获取App Store Connect API访问令牌 let token = fetchAccessToken()

//获取用户订阅信息 let url = URL(string: "https://api.appstoreconnect.apple.com/v1/users/(userId)/subscriptions") var request = URLRequest(url: url!) request.setValue("Bearer (token)", forHTTPHeaderField: "Authorization") URLSession.shared.dataTask(with: request) { data, response, error in guard let data = data else { return }

//解析订阅信息
let decoder = JSONDecoder()
do {
    let subscriptions = try decoder.decode([Subscription].self, from: data)
    
    //处理订阅信息
    updateSubscriptions(subscriptions)
} catch {
    print(error.localizedDescription)
}

}.resume()

//验证订阅收据 let receiptData = fetchReceiptData() let requestDictionary = ["receipt-data": receiptData] let requestData = try! JSONSerialization.data(withJSONObject: requestDictionary, options: []) let url = URL(string: "https://api.appstoreconnect.apple.com/v1/verifyReceipt") var request = URLRequest(url: url!) request.setValue("application/json", forHTTPHeaderField: "Content-Type") request.httpMethod = "POST" request.httpBody = requestData request.setValue("Bearer (token)", forHTTPHeaderField: "Authorization") URLSession.shared.dataTask(with: request) { data, response