App Crashes on Buy Subscription when first time launched - ios

Question

I'm working on this subscription system for my app,it took a few days.But as I'm working more on it,it makes more problems.
Sometimes it happens that the app crashes when clicking on buy subscription.
Also I'm having the problem of not knowing when to stop the Please wait.... alert.I need to place the code in:
case .Purchasing:
self.alert_show()
break
But I don't know where to end it,I need to know the information when is the alert from iTunes loaded than to stop the Please wait.... alert.
The biggest problem right now that I'm facing is the crashing sometimes when i click on the Buy Button.
The crashing happens when first time launching the app,and clicking one the Buy Subscription.
Here is the code for the Buy Subscription:
#IBAction func buy_sub(sender: AnyObject) {
let payment:SKPayment = SKPayment(product: product)
SKPaymentQueue.defaultQueue().addPayment(payment)
}
Here is the error that I'm getting.
fatal error: unexpectedly found nil while unwrapping an Optional value..
I would like to share with you my source code of the subscription.If you have any advices what to add,or to correct or to correct this problems that i have it would be great.
Here is the full source code of the Subscription View:
class SubscriptionViewController: UIViewController ,SKPaymentTransactionObserver, SKProductsRequestDelegate {
//var productID = ""
var product: SKProduct!
#IBOutlet var buy_trial_button: UIButton!
override func viewDidAppear(animated: Bool) {
if(SKPaymentQueue.canMakePayments()) {
} else {
buy_trial_button.enabled = false
message_alert("Please enable IAPS to continue(Credit card information required in your iTunes account).")
}
//validateReceipt()
let keystore = NSUbiquitousKeyValueStore.defaultStore()
if keystore.objectForKey("expiration_date") != nil{
let expiration: AnyObject? = keystore.objectForKey("expiration_date")
let today = NSDate()
let expiredate = expiration as! NSDate
print("expiredate is %#",expiredate,today)
// var date1 = NSDate()
// var date2 = NSDate()
if(today.compare(expiredate) == NSComparisonResult.OrderedDescending){
print("today is later than expiredate")
validateReceipt()
print("Validating")
}else if(today.compare(expiredate) == NSComparisonResult.OrderedAscending){
print("today is earlier than expiredate")
self.performSegueWithIdentifier("subscriptionPassed", sender: self)
}
}else{
print("First time launch")
}
}
override func viewDidLoad() {
super.viewDidLoad()
SKPaymentQueue.defaultQueue().addTransactionObserver(self)
self.getProductInfo()
//SKPaymentQueue.defaultQueue().addTransactionObserver(self)
//self.getProductInfo()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func viewWillDisappear(animated: Bool) {
}
#IBAction func private_policy(sender: AnyObject) {
let openLink = NSURL(string : "http://arsutech.com/private_policy.php")
UIApplication.sharedApplication().openURL(openLink!)
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if(segue.identifier == "subscriptionPassed")
{
}
}
func productsRequest(request: SKProductsRequest, didReceiveResponse response: SKProductsResponse){
let products = response.products
if products.count != 0
{
product = products[0] as SKProduct
print(product.localizedTitle + "\n" + product.localizedDescription)
}
}
func getProductInfo(){
if (SKPaymentQueue.canMakePayments()){
let productID:NSSet = NSSet(object: "com.sxxxxxxxxxxxxxxxxx")
let request:SKProductsRequest = SKProductsRequest(productIdentifiers: productID as! Set<String>)
request.delegate = self
request.start()
}
}
#IBAction func buy_sub(sender: AnyObject) {
let payment:SKPayment = SKPayment(product: product)
SKPaymentQueue.defaultQueue().addPayment(payment)
}
#IBAction func buy_pro(sender: AnyObject) {
let openLink = NSURL(string : "https://itunes.apple.com/us/app/home-workouts-exercises-mma/id1060747118?mt=8")
UIApplication.sharedApplication().openURL(openLink!)
}
#IBAction func exit(sender: AnyObject) {
exit(0)
}
func validateReceipt(){
alert_show()
let mainBundle = NSBundle.mainBundle() as NSBundle;
let receiptUrl = mainBundle.appStoreReceiptURL;
let isPresent = receiptUrl?.checkResourceIsReachableAndReturnError(NSErrorPointer());
if(isPresent == true){
let data = NSData(contentsOfURL: receiptUrl! );
// Create the JSON object that describes the request
let requestContents = NSMutableDictionary();
//let encodeddata = data!.base64EncodedStringWithOptions(NSDataBase64EncodingOptions());
let encodeddata = data!.base64EncodedString();
//print("encodeddata = \(encodeddata)");
requestContents.setObject(encodeddata, forKey: "receipt-data");
requestContents.setObject("c40f23af1aa44e159aezzzzzzzzzzzzzz", forKey: "password");
var requestData : NSData?
do{
requestData = try NSJSONSerialization.dataWithJSONObject(requestContents, options: NSJSONWritingOptions());
}catch{
// NSLog("Error in json data creation at verifyPaymentReceipt");
}
let documentsPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as NSString
let file = "\(documentsPath)/requestData"
if(NSFileManager.defaultManager().createFileAtPath(file, contents: data, attributes: nil)){
NSLog("File %# ",file);
}
else{
//NSLog("error File %# ",file);
}
if(requestData != nil){
//let strRequestData = NSString(data: requestData!, encoding: NSUTF8StringEncoding);
//print(" strRequestData = \(strRequestData)");
// Create a POST request with the receipt data.
//https://buy.itunes.apple.com/verifyReceipt
//https://sandbox.itunes.apple.com/verifyReceipt
let storeURL = NSURL(string: "https://sandbox.itunes.apple.com/verifyReceipt");
let storeRequest = NSMutableURLRequest(URL: storeURL!);
storeRequest.HTTPMethod = "POST";
storeRequest.HTTPBody = requestData;
// Make a connection to the iTunes Store on a background queue.
let queue = NSOperationQueue();
NSURLConnection.sendAsynchronousRequest(storeRequest, queue: queue, completionHandler: { (response : NSURLResponse?, data : NSData?, error : NSError?) -> Void in
if(error != nil){
//Handle Error
}
else{
let d = NSString(data: data!, encoding: NSUTF8StringEncoding);
// NSLog("DATA:%#", d!);
let dataA = d!.dataUsingEncoding(NSUTF8StringEncoding)
var jsonResponseInternal: NSMutableDictionary?
do{
jsonResponseInternal = try NSJSONSerialization.JSONObjectWithData(dataA!,options: NSJSONReadingOptions.AllowFragments) as? NSMutableDictionary;
//print(jsonResponseInternal);
}catch{
// NSLog("Parsing issue : verifyPaymentReceipt");
}
var jsonResponse: NSMutableDictionary?
do{
jsonResponse = try NSJSONSerialization.JSONObjectWithData(data!,
options: NSJSONReadingOptions.AllowFragments) as? NSMutableDictionary;
//print(jsonResponse);
}catch{
// NSLog("Parsing issue : verifyPaymentReceipt");
}
if(jsonResponse != nil){
if(jsonResponse != nil){
//NSLog("Expiration Date: %#", jsonResponse!);
//print("Passed")
/*
NSUserDefaults.standardUserDefaults().setBool(true, forKey: "Purchase")
NSUserDefaults.standardUserDefaults().synchronize()
*/
//self.performSegueWithIdentifier("subscriptionPassed", sender: self)
if jsonResponse!["status"] as? Int == 0 {
//print("Sucessfully returned internal receipt data")
if let receiptInfo: NSArray = jsonResponse!["latest_receipt_info"] as? NSArray {
let lastReceipt = receiptInfo.lastObject as! NSDictionary
var trial_period: Bool = false
// Get last receipt
//print("LAST RECEIPT INFORMATION \n",lastReceipt)
print("Last from internal memory",lastReceipt["original_transaction_id"])
//var is_trial = lastReceipt["is_trial_period"] as! Bool
//var date_bought =
//var date_expires =
// Format date
//print(is_trial)
// Format date
let formatter = NSDateFormatter()
formatter.dateFormat = "yyyy-MM-dd HH:mm:ss VV"
formatter.locale = NSLocale(localeIdentifier: "en_US_POSIX")
// Get Expiry date as NSDate
let subscriptionExpirationDate: NSDate = formatter.dateFromString(lastReceipt["expires_date"] as! String) as NSDate!
print("\n - DATE SUBSCRIPTION EXPIRES = \(subscriptionExpirationDate)")
let currentDateTime = NSDate()
print(currentDateTime)
if var is_trial:Bool = false{
if(lastReceipt["is_trial_period"] as? String == "Optional(\"true\")"){
is_trial = true
trial_period = is_trial
}else if(lastReceipt["is_trial_period"] as? String == "Optional(\"false\")"){
is_trial = false
trial_period = is_trial
}
}
if (subscriptionExpirationDate.compare(currentDateTime) == NSComparisonResult.OrderedDescending) {
self.alrt_close()
print("Pass");
print("The trial period is \(trial_period)")
let keystore = NSUbiquitousKeyValueStore.defaultStore()
keystore.setObject(subscriptionExpirationDate,forKey:"expiration_date")
keystore.synchronize()
self.performSegueWithIdentifier("subscriptionPassed", sender: self)
} else if (subscriptionExpirationDate.compare(currentDateTime) == NSComparisonResult.OrderedAscending) {
print("Not Pass");
print("Subscription expired")
self.alrt_close()
//self.message_alert("Subscription expired")
}
}
}
}
}
}
});
}
}
}
func paymentQueue(queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
for transaction:AnyObject in transactions {
if let trans:SKPaymentTransaction = transaction as? SKPaymentTransaction{
switch trans.transactionState {
case .Purchasing:
//self.alrt_close()
break
case .Deferred:
self.alert_show()
break
case .Purchased:
alrt_close()
self.validateReceipt()
//self.setExpirationDate()
SKPaymentQueue.defaultQueue().finishTransaction(transaction as! SKPaymentTransaction)
//dismissViewControllerAnimated(false, completion: nil)
break
case .Failed:
SKPaymentQueue.defaultQueue().finishTransaction(transaction as! SKPaymentTransaction)
print("Not called Expired")
message_alert("Error while purchasing!")
break
case .Restored:
SKPaymentQueue.defaultQueue().restoreCompletedTransactions()
print("Restored")
break
default:
break
}
}
}
}
//Alrt
func message_alert(let message_A:String){
let alert = UIAlertController(title: "", message: "\(message_A)", preferredStyle: UIAlertControllerStyle.Alert)
alert.addAction(UIAlertAction(title: "Ok", style: UIAlertActionStyle.Default, handler: nil))
self.presentViewController(alert, animated: true, completion: nil)
}
func alert_show(){
let alert = UIAlertController(title: nil, message: "Please wait...", preferredStyle: .Alert)
alert.view.tintColor = UIColor.blackColor()
let loadingIndicator: UIActivityIndicatorView = UIActivityIndicatorView(frame: CGRectMake(10, 5, 50, 50)) as UIActivityIndicatorView
loadingIndicator.hidesWhenStopped = true
loadingIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.Gray
loadingIndicator.startAnimating();
alert.view.addSubview(loadingIndicator)
presentViewController(alert, animated: true, completion: nil)
}
func alrt_close(){
self.dismissViewControllerAnimated(false, completion: nil)
}
}