dears ,
i have a question regarding iOS in app purchase , specific for "auto renewal Subscription" i develops app contains Free features & Paid features : the paid features based on "Monthly subscription & user have a free 1 week trial"
and all process is fine : we will fetch products & user can buy & we will validate receipt (I know recipe contains flags for “is_trial..” & “Purchase_date” …)…..
kindly note : I call “validate recipe” just after buy or after restore
but i have a the below problems : how can i know the below :
1- if user open app for second time, how i know if user still in trial Period ?
2- if user open app after 1 month : how I can know if subscription expired or not … (so if subscription expired I will the buy call again …)
, is the solution I will call “validate recipe” every time when user open app , so I can know if user in trail of in paid or after paid period (expired)…
Or I will save purchase date locally (ex : user default) & when user open app I will compare the current date with purchase date , really I don’t see this a true answer because user may be change the device date ….
Please advice …
the code belwo :
so now when open app : i request product :
SKPaymentQueue.default().add(self)
if(SKPaymentQueue.canMakePayments()) {
print("IAP is enabled, loading")
let productID: NSSet = NSSet(objects: "test.test1.test2.11")
let request: SKProductsRequest = SKProductsRequest(productIdentifiers: productID as! Set<String>)
request.delegate = self
request.start()
} else {
print("please enable IAPS")
}
when receive products :
func productsRequest(_ request: SKProductsRequest, didReceive response: SKProductsResponse) {
print("product request")
let myProduct = response.products
for product in myProduct {
list.append(product)
}
}
Now when user press on by button :
for product in self.list {
let prodID = product.productIdentifier
if(prodID == "test.test1.test2.11") {
self.p = product
self.buyProduct()
}
}
the the method bellow will call
func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
print("add payment")
for transaction: AnyObject in transactions {
let trans = transaction as! SKPaymentTransaction
switch trans.transactionState {
case .purchased:
receiptValidation()
queue.finishTransaction(trans)
break
case .failed:
print("buy error")
queue.finishTransaction(trans)
break
default:
print("Default")
break
}
}
}
& i will Validate the receipt :
func receiptValidation() {
if let appStoreReceiptURL = Bundle.main.appStoreReceiptURL,
FileManager.default.fileExists(atPath: appStoreReceiptURL.path) {
do {
let receiptData = try Data(contentsOf: appStoreReceiptURL, options: .alwaysMapped)
let receiptString = receiptData.base64EncodedString(options: [])
let dict = ["receipt-data" : receiptString, "password" : "xxxxxxxxxxx"] as [String : Any]
do {
let jsonData = try JSONSerialization.data(withJSONObject: dict, options: .prettyPrinted)
if let sandboxURL = Foundation.URL(string:"https://sandbox.itunes.apple.com/verifyReceipt") {
var request = URLRequest(url: sandboxURL)
request.httpMethod = "POST"
request.httpBody = jsonData
let session = URLSession(configuration: URLSessionConfiguration.default)
let task = session.dataTask(with: request) { data, response, error in
if let receivedData = data,
let httpResponse = response as? HTTPURLResponse,
error == nil,
httpResponse.statusCode == 200 {
do {
if let jsonResponse = try JSONSerialization.jsonObject(with: receivedData, options: JSONSerialization.ReadingOptions.mutableContainers) as? Dictionary<String, AnyObject> {
} else { print("Failed to cast serialized JSON to Dictionary<String, AnyObject>") }
}
catch { print("Couldn't serialize JSON with error: " + error.localizedDescription) }
}
}
task.resume()
} else { print("Couldn't convert string into URL. Check for special characters.") }
}
catch { print("Couldn't create JSON with error: " + error.localizedDescription) }
}
catch { print("Couldn't read receipt data with error: " + error.localizedDescription) }
}
}