iOS Question In-App OwnedProducts

[MarcoRome]

Hi all.
There is the possibility to understand if the user has purchased the license from Apple store type like the code we use for Play Store:

Sub manager_OwnedProducts (Success As Boolean, purchases As Map)
    Log(Success)
    If Success Then
        Log(purchases)
        For Each p As Purchase In purchases.Values
            Log(p.ProductId & ", Purchased? " & (p.PurchaseState = p.STATE_PURCHASED))
            If p.ProductId = "program_price" And p.PurchaseState = p.STATE_PURCHASED Then
                Starter.comprato = "1"
            End If
        Next
.....

Thank you
Marco

 

[Deleted member 103]

There is the possibility to understand if the user has purchased the license from Apple store type like the code we use for Play Store:

Have you already read the tutorial of Erel?

 

[MarcoRome]

Thanks Filippo,
i have read, but i didn't understand how to check if a user has already purchased a license.
Reading from this point, i didn't understand the solution adopted.

https://www.b4x.com/android/forum/threads/istore-in-app-purchases.49301/page-2#post-324787

is there any example ?
Thank you

 

[Deleted member 103]

In the Sub PurchaseCompleted you save the purchase result in a logfile, at the next start you have to check that the logfile exists, if not, then you call the method "MyStore.RestoreTransactions".

Next problem is if the user has deleted the app, then there is no more logfile.

Dan would be better, except the logfile, also to have a database on the internet, with which you can check if the user has purchased the app.
But, where should I know the user if it is not possible to check the unique user id?

Here another strategy must be applied.
I do it this way: before the user uses the "in-app purchase", they must authenticate themselves with a Google account. So I have the user ID and can save it to my database.

 

[MarcoRome]

Thank you for your suggestion.
Anyway is better Play Store

 

[MarcoRome]

Dan would be better, except the logfile, also to have a database on the internet, with which you can check if the user has purchased the app.
But, where should I know the user if it is not possible to check the unique user id?

a method to get a unique id is:

https://www.b4x.com/android/forum/threads/unique-device-id-and-name.46557/#post-287677

as suggested by Erel.

 

[Deleted member 103]

a method to get a unique id is:

https://www.b4x.com/android/forum/threads/unique-device-id-and-name.46557/#post-287677

as suggested by Erel.

but does not make sense, have you not read further?

 

[MarcoRome]

Why is doesnt sense. What you mean ?

 

[Deleted member 103]

Why is doesnt sense. What you mean ?

because it does not always stay the same.

 

[MarcoRome]

Seems like the bug has been fixed

https://stackoverflow.com/questions/30881478/identifierforvendor-changes-on-reinstall

 

[MarcoRome]

Official Documentation:
"According to the official documentation, a simple reinstall should not affect identifierForVendor."

https://developer.apple.com/documentation/uikit/uidevice/1620059-identifierforvendor

 

[Deleted member 103]

Official Documentation:
"According to the official documentation, a simple reinstall should not affect identifierForVendor."

https://developer.apple.com/documentation/uikit/uidevice/1620059-identifierforvendor

What happens if the user switches iPhone and wants to install the app again? Is the ID the same?

 

[MarcoRome]

What happens if the user switches iPhone and wants to install the app again? Is the ID the same?

I read:

identifierForVendor is an same UUID for all the apps that come from the same vendor running on the same device. A different value is returned for apps on the same device that come from different vendors, and for apps on different devices regardless of vendor.

The best way i think that is this ( iOS 11 ) is the ---> DeviceCheck

So, What Is It?
The TL;DR is nothing more than this: It’s an Apple approved, and guaranteed way, to identify your app as running on a valid Apple device while maintaining absolute user privacy.

In this way also is delete, reinstall, etc is the same
For more information look:
https://codeburst.io/unique-identifier-for-the-ios-devices-590bb778290d

 

[Deleted member 103]

Can we do a "DeviceCheck" with B4i?

 

[MarcoRome]

Can we do a "DeviceCheck" with B4i?

I think yes...with Erel for sure
This is documentation:
https://developer.apple.com/documentation/devicecheck

 

[Deleted member 103]

I think yes...with Erel for sure
This is documentation:
https://developer.apple.com/documentation/devicecheck

then write it in wish list.