iOS Question Get latest app version number from the App Store

JordiCP said:

To my understanding it should be legal, since you are accessing a public URL and parsing the results to get some info from a known position (however, just in case I'd search for this topic in the Apple publishing guidelines). The 'danger' with this specific URL is that, since it is not itself an API but an HTML page, if one day they happen to change the response format, you'll not be able to extract the info or even, whats worse, get incorrect results.

HERE they use this SWIFT code. I think it can be easily 'translated' using HttpJob and then parsing the JSON result. Only the app BundleID and country code are needed to build the URL string.

Spoiler

B4X:

guard let bundleId = Bundle.main.infoDictionary?["CFBundleIdentifier"] as? String else { return }
guard let url = URL(string: "https://itunes.apple.com/lookup?bundleId=\(bundleId)&country=br") else { return }
    let task = URLSession.shared.dataTask(with: url) { (data, response, error) in
    if let data = data {
        do {
            let jsonObject = try JSONSerialization.jsonObject(with: data)
            guard let json = jsonObject as? [String: Any] else {
                print("The received that is not a Dictionary")
                return
            }
            let results = json["results"] as? [[String: Any]]
            let firstResult = results?.first
            let currentVersion = firstResult?["version"] as? String
            print("currentVersion: ", currentVersion)
        } catch let serializationError {
            print("Serialization Error: ", serializationError)
        }
    } else if let error = error {
        print("Error: ", error)
    } else if let response = response {
        print("Response: ", response)
    } else {
        print("Unknown error")
    }
}
task.resume()

Click to expand...

JordiCP said:

Found it. Google "iTunes search API" and go to the apple developer related results.

An interesting related question (there are others)

iTunes Search API | Apple Developer Forums

developer.apple.com

Click to expand...

    Protected Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

        Dim wc As New WebClient
        Try

            Dim str As String, str2 As String

            Dim url As String = "https://itunes.apple.com/lookup?bundleId=yourbundlename&country=us"

            str = wc.DownloadString(url)
            Label3.Text = str
            Dim json As JObject = JObject.Parse(str)
            str2 = json.SelectToken("results").First.SelectToken("version")
            Label3.Text &= "<hr/>" & str2

        Catch ex As Exception
            Label3.Text = ex.Message
        Finally

        End Try
    End Sub