Check if my app has a new version on AppStore

Question

I would like to manually check if there are new updates for my app while the user is in it, and prompt him to download the new version. Can I do this by checking the version of my app in the app store - programatically?

Answer 1

new version on AppStore

swift 3.0

func appUpdateAvailable() -> Bool
{
    let storeInfoURL: String = "http://itunes.apple.com/lookup?bundleId=YOURBUNDLEID"
    var upgradeAvailable = false
    // Get the main bundle of the app so that we can determine the app's version number
    let bundle = Bundle.main
    if let infoDictionary = bundle.infoDictionary {
        // The URL for this app on the iTunes store uses the Apple ID for the  This never changes, so it is a constant
        let urlOnAppStore = NSURL(string: storeInfoURL)
        if let dataInJSON = NSData(contentsOf: urlOnAppStore! as URL) {
            // Try to deserialize the JSON that we got
            if let dict: NSDictionary = try! JSONSerialization.jsonObject(with: dataInJSON as Data, options: JSONSerialization.ReadingOptions.allowFragments) as! [String: AnyObject] as NSDictionary? {
                if let results:NSArray = dict["results"] as? NSArray {
                        if let version = ((results[0] as! NSDictionary).value(forKey: "version")!) as? String {
                       // Get the version number of the current version installed on device
                                if let currentVersion = infoDictionary["CFBundleShortVersionString"] as? String {
                            // Check if they are the same. If not, an upgrade is available.
                            print("\(version)")
                            if version != currentVersion {
                                        upgradeAvailable = true
                            }
                        }
                    }
                }
            }
        }
    }
    return upgradeAvailable
}

Answer 2

I saw many ways to check App update. so based on many answers I mix them and create my solution which is available on GitHub If Any update required Please let me know. This code for Swift 4

GitHub link To this code. https://github.com/anupgupta-arg/iOS-Swift-ArgAppUpdater

   import UIKit

enum VersionError: Error {
    case invalidBundleInfo, invalidResponse
}

class LookupResult: Decodable {
    var results: [AppInfo]
}

class AppInfo: Decodable {
    var version: String
    var trackViewUrl: String
    //let identifier = Bundle.main.infoDictionary?["CFBundleIdentifier"] as? String,
    // You can add many thing based on "http://itunes.apple.com/lookup?bundleId=\(identifier)"  response
    // here version and trackViewUrl are key of URL response
    // so you can add all key beased on your requirement.

}

class ArgAppUpdater: NSObject {
    private static var _instance: ArgAppUpdater?;

    private override init() {

    }

    public static func getSingleton() -> ArgAppUpdater {
        if (ArgAppUpdater._instance == nil) {
            ArgAppUpdater._instance = ArgAppUpdater.init();
        }
        return ArgAppUpdater._instance!;
    }

    private func getAppInfo(completion: @escaping (AppInfo?, Error?) -> Void) -> URLSessionDataTask? {
        guard let identifier = Bundle.main.infoDictionary?["CFBundleIdentifier"] as? String,
            let url = URL(string: "http://itunes.apple.com/lookup?bundleId=\(identifier)") else {
                DispatchQueue.main.async {
                    completion(nil, VersionError.invalidBundleInfo)
                }
                return nil
        }
        let task = URLSession.shared.dataTask(with: url) { (data, response, error) in
            do {
                if let error = error { throw error }
                guard let data = data else { throw VersionError.invalidResponse }

                print("Data:::",data)
                print("response###",response!)

                let result = try JSONDecoder().decode(LookupResult.self, from: data)

                let dictionary = try? JSONSerialization.jsonObject(with: data, options: .mutableLeaves)

                print("dictionary",dictionary!)


                guard let info = result.results.first else { throw VersionError.invalidResponse }
                print("result:::",result)
                completion(info, nil)
            } catch {
                completion(nil, error)
            }
        }
        task.resume()

        print("task ******", task)
        return task
    }
    private  func checkVersion(force: Bool) {
        let info = Bundle.main.infoDictionary
        let currentVersion = info?["CFBundleShortVersionString"] as? String
        _ = getAppInfo { (info, error) in

            let appStoreAppVersion = info?.version

            if let error = error {
                print(error)



            }else if appStoreAppVersion!.compare(currentVersion!, options: .numeric) == .orderedDescending {
                //                print("needs update")
               // print("hiiii")
                DispatchQueue.main.async {
                    let topController: UIViewController = UIApplication.shared.keyWindow!.rootViewController!

                    topController.showAppUpdateAlert(Version: (info?.version)!, Force: force, AppURL: (info?.trackViewUrl)!)
            }

            }
        }


    }

    func showUpdateWithConfirmation() {
        checkVersion(force : false)


    }

    func showUpdateWithForce() {
        checkVersion(force : true)
    }



}

extension UIViewController {


    fileprivate func showAppUpdateAlert( Version : String, Force: Bool, AppURL: String) {
        print("AppURL:::::",AppURL)

        let bundleName = Bundle.main.infoDictionary!["CFBundleDisplayName"] as! String;
        let alertMessage = "\(bundleName) Version \(Version) is available on AppStore."
        let alertTitle = "New Version"


        let alertController = UIAlertController(title: alertTitle, message: alertMessage, preferredStyle: .alert)


        if !Force {
            let notNowButton = UIAlertAction(title: "Not Now", style: .default) { (action:UIAlertAction) in
                print("Don't Call API");


            }
            alertController.addAction(notNowButton)
        }

        let updateButton = UIAlertAction(title: "Update", style: .default) { (action:UIAlertAction) in
            print("Call API");
            print("No update")
            guard let url = URL(string: AppURL) else {
                return
            }
            if #available(iOS 10.0, *) {
                UIApplication.shared.open(url, options: [:], completionHandler: nil)
            } else {
                UIApplication.shared.openURL(url)
            }

        }

        alertController.addAction(updateButton)
        self.present(alertController, animated: true, completion: nil)
    }
}

Refrence : https://stackoverflow.com/a/48810541/5855888 And https://github.com/emotality/ATAppUpdater

Happy Coding

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Answer 3

Since I was facing the same problem, I found the answer provided by Mario Hendricks. Unfornatelly when I tryed to aply his code on my project, XCode did complain about Casting problems saying "MDLMaterialProperty has no subscript members". His code was trying to set this MDLMaterial... as the type of the constant "lookupResult", making the casting to "Int" failing every single time. My solution was to provide a type annotation for my variable to NSDictionary to be clear about the kind of value I needed. With that, I could access the value "version" that I needed.

Obs: For this YOURBUNDLEID, you can get from your Xcode project.... "Targets > General > Identity > Bundle Identifier"

So here is the my code with some simplifications as well:

  func appUpdateAvailable() -> Bool
{
    let storeInfoURL: String = "http://itunes.apple.com/lookup?bundleId=YOURBUNDLEID"
    var upgradeAvailable = false
    // Get the main bundle of the app so that we can determine the app's version number
    let bundle = NSBundle.mainBundle()
    if let infoDictionary = bundle.infoDictionary {
        // The URL for this app on the iTunes store uses the Apple ID for the  This never changes, so it is a constant
        let urlOnAppStore = NSURL(string: storeInfoURL)
        if let dataInJSON = NSData(contentsOfURL: urlOnAppStore!) {
            // Try to deserialize the JSON that we got
            if let dict: NSDictionary = try? NSJSONSerialization.JSONObjectWithData(dataInJSON, options: NSJSONReadingOptions.AllowFragments) as! [String: AnyObject] {
                if let results:NSArray = dict["results"] as? NSArray {
                    if let version = results[0].valueForKey("version") as? String {
                        // Get the version number of the current version installed on device
                        if let currentVersion = infoDictionary["CFBundleShortVersionString"] as? String {
                            // Check if they are the same. If not, an upgrade is available.
                            print("\(version)")
                            if version != currentVersion {
                                upgradeAvailable = true
                            }
                        }
                    }
                }
            }
        }
    }
    return upgradeAvailable
}

All suggestions for improvement of this code are welcome!

Answer 4

Here is a simple code snippet that lets you know if the current version is different

-(BOOL) needsUpdate{
    NSDictionary* infoDictionary = [[NSBundle mainBundle] infoDictionary];
    NSString* appID = infoDictionary[@"CFBundleIdentifier"];
    NSURL* url = [NSURL URLWithString:[NSString stringWithFormat:@"http://itunes.apple.com/lookup?bundleId=%@", appID]];
    NSData* data = [NSData dataWithContentsOfURL:url];
    NSDictionary* lookup = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];

    if ([lookup[@"resultCount"] integerValue] == 1){
        NSString* appStoreVersion = lookup[@"results"][0][@"version"];
        NSString* currentVersion = infoDictionary[@"CFBundleShortVersionString"];
        if (![appStoreVersion isEqualToString:currentVersion]){
            NSLog(@"Need to update [%@ != %@]", appStoreVersion, currentVersion);
            return YES;
        }
    }
    return NO;
}

Note: Make sure that when you enter the new version in iTunes, this matches the version in the app you are releasing. If not then the above code will always return YES regardless if the user updates.

Answer 5

func isUpdateAvailable() -> Bool {
    guard
        let info = Bundle.main.infoDictionary,
        let identifier = info["CFBundleIdentifier"] as? String,
        let url = URL(string: "http://itunes.apple.com/lookup?bundleId=\(identifier)"),
        let data = try? Data(contentsOf: url),
        let json = try? JSONSerialization.jsonObject(with: data, options: .allowFragments) as? [String: Any],
        let results = json?["results"] as? [[String: Any]],
        results.count > 0,
        let versionString = results[0]["version"] as? String
        else {
            return false
    }

    return AppVersion(versionString) > AppVersion.marketingVersion
}

to compare version string :

https://github.com/eure/AppVersionMonitor

Answer 6

This question was asked in 2011, I found it in 2018 while searching for some way for not only to check new version of app in App Store but also to notify user about it.

After small research I came to conclusion that answer of juanjo (related to Swift 3) https://stackoverflow.com/a/40939740/1218405 is the optimal solution if you want to do this in code by yourself

Also I can suggest two great projects on GitHub (2300+ stars each)

• https://github.com/ArtSabintsev/Harpy for Objective-C
• https://github.com/ArtSabintsev/Siren for Swift

Example for Siren (AppDelegate.swift)

  func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {

      let siren = Siren.shared
      siren.checkVersion(checkType: .immediately)

      return true
    }

• You also can show different types of alerts about new version (allowing to skip version or forcing user to update)
• You can specify how often version check should take place (daily / weekly / immediately)
• You can specify how many days after new version released to app store alert should appear