inAppCheckSubscription (Function)

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Principle and implementation

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inAppCheckSubscription (Function)

In french: inAppVérifieAbonnement

When starting the iOS application, checks whether the In-App subscriptions have been renewed.

Example

// Initialization code of project
inAppCheckSubscription(CheckSubscription)

PROCEDURE CheckSubscription(bSuccess is boolean, Product is inAppProduct)
IF not bSuccess THEN
ToastDisplay(ErrorInfo())
RETURN
ELSE
// Call the inAppListPurchase function
// to check the start and end dates of subscription
END

Syntax

inAppCheckSubscription(<Procedure>)

<Procedure>: Character string (with or without quotes)

Name of WLanguage procedure ("callback" procedure) run if one of the subscriptions was renewed. This procedure has the following format:

PROCEDURE <ProcedureName>(<Success> is boolean, <Product> is inAppProduct)

where:
<Success> is boolean:
True if the subscription was renewed,
False otherwise.
<Product> is an inAppProduct variable corresponding to the product for which the subscription renewal is checked.

Remarks

Principle and implementation

In iOS, you have the ability to create self-renewable subscriptions for the in-App purchases.

When this type of subscription expires, the subscription is automatically renewed by the AppStore. A new purchase transaction is automatically created and transmitted during the next application start. Therefore, this transaction must be supported by the application to take into account the subscription renewal.

inAppCheckSubscription must be called as soon as possible in the initialization process of project in order to process the subscription renewals. The procedure will be called as many times as the number of subscriptions to renew.

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