CKAsset (NSData) to UIWebView to share with ActivityViewController - ios

Question

I have PDF Files as CKAssets, which are called and presented in a UIWebView without issue. I have managed to manipulate the code so as the CKAsset will present in a ActivityViewController, but this is within the func method and I wish to assign this part to an Action button. My question is how can I call a few lines within a function? or have sufficient references outside the func to make the action button work?
Here is the func code -
func queryRecord() {
let container = CKContainer.default()
let publicDatabase = container.publicCloudDatabase
let predicate = NSPredicate(format: "recordID = %#", CKRecordID(recordName : documentID))
let query = CKQuery(recordType: "Documents", predicate: predicate)
publicDatabase.perform(query, inZoneWith: nil, completionHandler: ({results, error in
if (error != nil) {
DispatchQueue.main.async() {
self.notifyUser("Cloud Access Error", message: error!.localizedDescription)
}
} else {
if results!.count > 0 {
let record = results![0]
print(record)
DispatchQueue.main.async() {
let docTitle = record.object(forKey: "documentName") as! String
self.title = "\(docTitle)"
let docType = record.object(forKey: "documentType") as! String
if docType == "PDF" || docType == "pdf" {
if let asset1 = record.object(forKey: "documentFile") as? CKAsset {
let doc1Data : NSData? = NSData(contentsOf:asset1.fileURL)
self.docWebView.load(doc1Data! as Data, mimeType: "application/pdf", textEncodingName: "UTF-8", baseURL: NSURL() as URL)
let filenameURL = [(asset1.fileURL)]
let activityController = UIActivityViewController(activityItems: filenameURL, applicationActivities: nil)
self.present(activityController, animated: true, completion: nil)
}
} else {
I have tried to reference filenameURL outside the code, but it does not recognise that filenameURL is no member of the class.

Answer 1

I figured it out (I think). Here goes -
I changed
let filenameURL = [(asset1.fileURL)]
to
self.filenameURL = [(asset1.fileURL)]
then added
var filenameURL : Any?
to the ViewController Class. Which allowed me to add the relevant code to the actionButton -
#IBAction func activityVCButton(_ sender: UIBarButtonItem) {
let activityController = UIActivityViewController(activityItems: (filenameURL as? [Any])!, applicationActivities: nil)
self.present(activityController, animated: true, completion: nil)
}
I think the key, which I seemed to be missing was the Any?, but I am happy to be corrected if there was something more fundamental I was missing.