iOS 10 remote notifications with pictures - ios

Question

First of all I'm new developing with Swift, I have an Objective C background, but I'm mainly an Android developer.
Actually I'm developing an app in Swift 3 and Xcode 8. I need to add to this application the new rich push notification system of Apple.
I have been able to add a local rich notification example with pics, videos and gifs. But I need to show remote notifications with pics hosted on a typical Internet server.
To launch local notifications I'm using this code:
#IBAction func launchPicNotification(sender: UIButton) {
let content = UNMutableNotificationContent()
content.title = "Title"
content.body = "Body"
content.sound = UNNotificationSound.default()
let url = Bundle.main.url(forResource:"foto", withExtension: "jpg")
let attachment = try? UNNotificationAttachment(identifier: "Notification",
url: url!,
options: [:])
if let attachment = attachment {
print("Yes")
content.attachments.append(attachment)
}else{
print("No")
}
let trigger = UNTimeIntervalNotificationTrigger.init(timeInterval: 10.0, repeats: false)
let request = UNNotificationRequest(identifier:"identificador", content: content, trigger: trigger)
UNUserNotificationCenter.current().add(request){(error) in
if (error != nil){
//handle here
}
}
}
I need to load a remote jpg file as attached image. Does somebody know how can I load a remote file instead of load a local picture?
Thanks

Answer 1

I added an extension to UIImage to handle this. Once you create a UIImage from the downloaded data, you can call this function to create a local URL.
extension UIImage {
func createLocalURL() -> URL? {
guard let data = UIImagePNGRepresentation(self) else {
print("Coule not get UIImagePNGRepresentation Data for photo")
return nil
}
let localUrl = self.getDocumentsDirectory().appendingPathComponent("copy.png")
do {
try data.write(to: localUrl)
} catch let error {
print("Failed to write to URL")
print(error)
}
return localUrl
}
}