How to check app version on AppStore , and display upgrade popup in app.
// Step 1 Call the below line in AppDelegate under DidBecome Active method
AppUpdater.shared.showUpdate(withConfirmation: true)
func applicationDidBecomeActive(_ application: UIApplication) {
AppUpdater.shared.showUpdate(withConfirmation: true)
//withconfirmation is true to "not now " button appear ,otherwise only upgrade button will appear
}
//Step 2 Create a swift file and paste below code
import UIKit
enum VersionError: Error {
case invalidBundleInfo, invalidResponse
}
class LookupResult: Decodable {
var results: [AppInfo]
}
class AppInfo: Decodable {
var version: String
var trackViewUrl: String
}
class AppUpdater: NSObject {
private override init() {}
static let shared = AppUpdater()
func showUpdate(withConfirmation: Bool) {
DispatchQueue.global().async {
self.checkVersion(force : !withConfirmation)
}
}
private func checkVersion(force: Bool) {
let info = Bundle.main.infoDictionary
if let currentVersion = info?["CFBundleShortVersionString"] as? String {
_ = getAppInfo { (info, error) in
if let appStoreAppVersion = info?.version{
if let error = error {
print("error getting app store version: ", error)
} else if appStoreAppVersion <= currentVersion {
print("Already on the last app version: ",currentVersion)
} else {
print("Needs update: AppStore Version: \(appStoreAppVersion) > Current version: ",currentVersion)
DispatchQueue.main.async {
let topController: UIViewController = UIApplication.shared.keyWindow!.rootViewController!
topController.showAppUpdateAlert(Version: (info?.version)!, Force: force, AppURL: (info?.trackViewUrl)!)
}
}
}
}
}
}
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 }
let result = try JSONDecoder().decode(LookupResult.self, from: data)
guard let info = result.results.first else { throw VersionError.invalidResponse }
completion(info, nil)
} catch {
completion(nil, error)
}
}
task.resume()
return task
}
}
extension UIViewController {
@objc fileprivate func showAppUpdateAlert( Version : String, Force: Bool, AppURL: String) {
let appName = Bundle.appName()
let alertTitle = "New Version"
let alertMessage = "\(appName) Version \(Version) is available on AppStore. Please upgrade to the new version of the app."
let alertController = UIAlertController(title: alertTitle, message: alertMessage, preferredStyle: .alert)
if !Force {
let notNowButton = UIAlertAction(title: "Not Now", style: .default)
alertController.addAction(notNowButton)
}
let updateButton = UIAlertAction(title: "Update", style: .default) { (action:UIAlertAction) in
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)
}
}
extension Bundle {
static func appName() -> String {
guard let dictionary = Bundle.main.infoDictionary else {
return ""
}
if let version : String = dictionary["CFBundleName"] as? String {
return version
} else {
return ""
}
}
}
