iOS Swift 3: Share Data from share extension to Host App - ios

Question

Hello i have implemented Share extension for my app in which picks images from gallery and send to a particular view. Now the problem is when i'm trying to save array of images(images picked from gallery)
func manageImages() {
let content = extensionContext!.inputItems[0] as! NSExtensionItem
let contentType = kUTTypeImage as String
for (index, attachment) in (content.attachments as! [NSItemProvider]).enumerated() {
if attachment.hasItemConformingToTypeIdentifier(contentType) {
attachment.loadItem(forTypeIdentifier: contentType, options: nil) { data, error in
if error == nil, let url = data as? URL {
do {
let imageData = try Data(contentsOf: url)
let image = UIImage(data: imageData)
self.selectedImages.append(image!)
if index == (content.attachments?.count)! - 1 {
self.imgCollectionView.reloadData()
UserDefaults.standard.set(self.selectedImages, forKey: "PHOTOKEY")
UserDefaults.standard.synchronize()
}
}
catch let exp {
print("GETTING ERROR \(exp.localizedDescription)")
}
} else {
print("GETTING ERROR")
let alert = UIAlertController(title: "Error", message: "Error loading image", preferredStyle: .alert)
let action = UIAlertAction(title: "Error", style: .cancel) { _ in
self.dismiss(animated: true, completion: nil)
}
alert.addAction(action)
self.present(alert, animated: true, completion: nil)
}
}
}
}
}
and fetching that array in AppDelegate method
func application(_ app: UIApplication,
open url: URL,
options: [UIApplicationOpenURLOptionsKey : Any] = [:]) -> Bool {
if let key = url.absoluteString.components(separatedBy: "=").last, let _ = UserDefaults.standard.array(forKey: key) {
let myVC = UIStoryboard.getViewController(storyboardName: "Main",
storyboardId: "MyViewController")
let navVC = UIStoryboard.getViewController(storyboardName: "Main",
storyboardId: "MyNavigationVC") as! UINavigationController
navVC.viewControllers.append(myVC)
self.window?.rootViewController = navVC
self.window?.makeKeyAndVisible()
return true
}
return false
}
I'm sending url let url = URL(string: "unfoldsPrintsShare://dataUrl=PHOTOKEY") and able to get PHOTOKEY
successfully but array getting nil and hence condition is false.
What should i do ?, i googled a lot but didn't find any answer
Also i'm not getting logs when i'm trying to attach extension process via debug.
P.S. : Using Xcode 8.3.3 iOS 10.3, iPhone 6 physical device
Update: Tried Via App Groups Suit Names also
let userDefaults = UserDefaults(suiteName: "group.com.company.appName")
userDefaults?.set(self.selectedImages, forKey: "PHOTOKEY")
userDefaults?.synchronize()
Still No luck

Answer 1

According to #Stefan Church, i tried like this
let imagesData: [Data] = []
saving image Data format into array instead of UIImage
let userDefaults = UserDefaults(suiteName: "group.com.myconmanyName.AppName")
userDefaults?.set(self?.imagesData, forKey: key)
userDefaults?.synchronize()
and it works
Thanks Stefan Church