CKAsset (NSData)到UIWebView以与ActivityViewController共享

Question

我有PDF文件作为CKAssets，这是调用和呈现在一个UIWebView没有问题。我已经成功地处理了代码，这样CKAsset就会出现在ActivityViewController中，但这是在func方法中，我希望将这一部分分配给一个操作按钮。我的问题是如何在一个函数中调用几行代码？或者在func之外有足够的引用来使操作按钮工作？

这是函数代码-

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 {

我尝试在代码外部引用filenameURL，但它不认识到filenameURL不是该类的成员。

Answer 1

我(我想)弄明白了。是这样的-

我变了

let filenameURL = [(asset1.fileURL)]

至

self.filenameURL = [(asset1.fileURL)]

然后添加了

var filenameURL : Any? 

添加到ViewController类。这使我能够将相关代码添加到actionButton中-

@IBAction func activityVCButton(_ sender: UIBarButtonItem) {
        let activityController = UIActivityViewController(activityItems: (filenameURL as? [Any])!, applicationActivities: nil)
        self.present(activityController, animated: true, completion: nil)
         }

我认为我似乎遗漏的关键是Any?，但如果我遗漏了更基本的东西，我很高兴被纠正。