iOS Rich Push notifications with Xcode, Swift3 but cannot get image - ios

Question

I am trying to create iOS Rich Push notifications with Xcode, Swift3.
I already make sure about push notifications (subject, body) with curl command of php but I can't create Rich Push Notifications referred to in this document.
I added Notification Service Extension like this: 「 File 」→「 New 」→「 Target... 」→「 Notification Service Extension 」 and also I added in 「'mutable_content': True」 curl command.
Then run but not call 「class NotificationService: UNNotificationServiceExtension」 so can't view push notifications image.
The following my code
import UserNotifications
class NotificationService: UNNotificationServiceExtension {
let imageKey = AnyHashable("gcm.notification.image_url")
var contentHandler: ((UNNotificationContent) -> Void)?
var bestAttemptContent: UNMutableNotificationContent?
override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: #escaping (UNNotificationContent) -> Void) {
self.contentHandler = contentHandler
bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent)
if let imageUrl = request.content.userInfo[imageKey] as? String {
let session = URLSession(configuration: URLSessionConfiguration.default)
let task = session.dataTask(with: URL(string: imageUrl)!, completionHandler: { [weak self] (data, response, error) in
if let data = data {
do {
let writePath = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent("push.png")
try data.write(to: writePath)
guard let wself = self else {
return
}
if let bestAttemptContent = wself.bestAttemptContent {
let attachment = try UNNotificationAttachment(identifier: "nnsnodnb_demo", url: writePath, options: nil)
bestAttemptContent.attachments = [attachment]
contentHandler(bestAttemptContent)
}
} catch let error as NSError {
print(error.localizedDescription)
guard let wself = self else {
return
}
if let bestAttemptContent = wself.bestAttemptContent {
contentHandler(bestAttemptContent)
}
}
} else if let error = error {
print(error.localizedDescription)
}
})
task.resume()
} else {
if let bestAttemptContent = bestAttemptContent {
contentHandler(bestAttemptContent)
}
}
}
override func serviceExtensionTimeWillExpire() {
if let contentHandler = contentHandler, let bestAttemptContent = bestAttemptContent {
contentHandler(bestAttemptContent)
}
}
}

Answer 1

REF : https://www.pluralsight.com/guides/swift/creating-ios-rich-push-notifications
I have done like this hope it helps for GIF images you can change extension to .png.
Make sure that in APNS payload attachment-url is coming for image.
Check for App transport security key in case of image url start from http://...
Your image should be under ~200px. For me it not works beyond(HIT and TRIAL).
Code:
import UserNotifications
import SDWebImage
class NotificationService: UNNotificationServiceExtension {
var contentHandler: ((UNNotificationContent) -> Void)?
var bestAttemptContent: UNMutableNotificationContent?
override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: #escaping (UNNotificationContent) -> Void) {
self.contentHandler = contentHandler
bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent)
func failEarly() {
contentHandler(request.content)
}
guard let content = (request.content.mutableCopy() as? UNMutableNotificationContent) else {
return failEarly()
}
guard let attachmentURL = content.userInfo["attachment-url"] as? String else {
return failEarly()
}
SDWebImageDownloader.shared().downloadImage(with: URL(string: attachmentURL)!,
options: SDWebImageDownloaderOptions.continueInBackground,
progress: nil) { (image, data, error, flag) in
guard let attachment = UNNotificationAttachment.create(imageFileIdentifier: "image.gif",
data: data! as NSData,
options: nil) else { return failEarly() }
content.attachments = [attachment]
contentHandler(content.copy() as! UNNotificationContent)
if let bestAttemptContent = self.bestAttemptContent {
bestAttemptContent.title = "\(bestAttemptContent.title) [modified]"
contentHandler(bestAttemptContent)
}
}
}
override func serviceExtensionTimeWillExpire() {
if let contentHandler = contentHandler, let bestAttemptContent = bestAttemptContent {
contentHandler(bestAttemptContent)
}
}
}
extension UNNotificationAttachment {
static func create(imageFileIdentifier: String, data: NSData, options: [NSObject : AnyObject]?) -> UNNotificationAttachment? {
let fileManager = FileManager.default
let tmpSubFolderName = ProcessInfo.processInfo.globallyUniqueString
let tmpSubFolderURL = NSURL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent(tmpSubFolderName, isDirectory: true)
do {
try fileManager.createDirectory(at: tmpSubFolderURL!, withIntermediateDirectories: true, attributes: nil)
let fileURL = tmpSubFolderURL?.appendingPathComponent(imageFileIdentifier)
try data.write(to: fileURL!, options: [])
let imageAttachment = try UNNotificationAttachment(identifier: imageFileIdentifier, url: fileURL!, options: options)
return imageAttachment
} catch let error {
print("error \(error)")
}
return nil
}
}