While reviewing the Apple Documentation, I came across a potential issue in one of the examples that I believe is worth addressing.
The example appears to compare strings instead of integers, which could lead to unexpected behavior in production environments. Specifically, in the line where originalMajorVersion (a string) is compared with newBusinessModelMajorVersion (also a string) using <:
if originalMajorVersion < newBusinessModelMajorVersion
This comparison performs a lexicographical check rather than evaluating the numerical values of the strings. As a result, strings like "10" would incorrectly be considered less than "2", which is not the desired behaviour when comparing version numbers.
I have reported this via the Feedback assistant (FB16432337) but at the time of posting this there has been no reply at all (23 days)
Supporting business model changes by using the app transaction
do {
// Get the appTransaction.
let shared = try await AppTransaction.shared
if case .verified(let appTransaction) = shared {
// Hard-code the major version number in which the app's business model changed.
let newBusinessModelMajorVersion = "2"
// Get the major version number of the version the customer originally purchased.
let versionComponents = appTransaction.originalAppVersion.split(separator: ".")
let originalMajorVersion = versionComponents[0]
if originalMajorVersion < newBusinessModelMajorVersion {
// This customer purchased the app before the business model changed.
// Deliver content that they're entitled to based on their app purchase.
}
else {
// This customer purchased the app after the business model changed.
}
}
}
catch {
// Handle errors.
}
Topic:
App & System Services
SubTopic:
StoreKit