Unable to share text file(.txt, .csv, .tsv, ...)

[itsminh99]

` import UIKit import Social import MobileCoreServices import Photos

class ShareViewController: SLComposeServiceViewController {

// TODO: IMPORTANT: This should be your host app bundle identifier
let hostAppBundleIdentifier = "hostAppBundleIdentifier"

let shareProtocol = "hostAppBundleIdentifier"//share url protocol (must be unique to your app, suggest using your apple bundle id, ie: hostAppBundleIdentifier) let sharedKey = "ShareKey" var sharedMedia: [SharedMediaFile] = [] var sharedText: [String] = [] let imageContentType = kUTTypeImage as String let videoContentType = kUTTypeMovie as String let textContentType = kUTTypeText as String let urlContentType = kUTTypeURL as String let fileURLType = kUTTypeFileURL as String;

override func isContentValid() -> Bool {
    // Do validation of contentText and/or NSExtensionContext attachments here
    return true
}

override func viewDidLoad() {
   super.viewDidLoad();
  if let content = extensionContext!.inputItems[0] as? NSExtensionItem {
    if let contents = content.attachments {
      for (index, attachment) in (contents).enumerated() {
        if attachment.hasItemConformingToTypeIdentifier(imageContentType) {
          handleImages(content: content, attachment: attachment, index: index)
        } else if attachment.hasItemConformingToTypeIdentifier(textContentType) {
          handleText(content: content, attachment: attachment, index: index)
        } else if attachment.hasItemConformingToTypeIdentifier(fileURLType) {
          handleFiles(content: content, attachment: attachment, index: index)
        } else if attachment.hasItemConformingToTypeIdentifier(urlContentType) {
          handleUrl(content: content, attachment: attachment, index: index)
        } else if attachment.hasItemConformingToTypeIdentifier(videoContentType) {
          handleVideos(content: content, attachment: attachment, index: index)
        }
      }
    }
  }

}

override func didSelectPost() {
   print("didSelectPost");
}

override func configurationItems() -> [Any]! {
    // To add configuration options via table cells at the bottom of the sheet, return an array of SLComposeSheetConfigurationItem here.
    return []
}

private func handleText (content: NSExtensionItem, attachment: NSItemProvider, index: Int) {
  attachment.loadItem(forTypeIdentifier: textContentType, options: nil) { [weak self] data, error in

  if error == nil, let item = data as? String, let this = self {

   this.sharedText.append(item)

   // If this is the last item, save imagesData in userDefaults and redirect to host app
   if index == (content.attachments?.count)! - 1 {
     let userDefaults = UserDefaults(suiteName: "group.\(this.hostAppBundleIdentifier)")
     userDefaults?.set(this.sharedText, forKey: this.sharedKey)
     userDefaults?.synchronize()
     this.redirectToHostApp(type: .text)
   }

  } else {
    self?.dismissWithError()
  }
}

}

private func handleUrl (content: NSExtensionItem, attachment: NSItemProvider, index: Int) { attachment.loadItem(forTypeIdentifier: urlContentType, options: nil) { [weak self] data, error in

 if error == nil, let item = data as? URL, let this = self {

   this.sharedText.append(item.absoluteString)

   // If this is the last item, save imagesData in userDefaults and redirect to host app
   if index == (content.attachments?.count)! - 1 {
     let userDefaults = UserDefaults(suiteName: "group.\(this.hostAppBundleIdentifier)")
     userDefaults?.set(this.sharedText, forKey: this.sharedKey)
     userDefaults?.synchronize()
     this.redirectToHostApp(type: .text)
   }

 } else {
   self?.dismissWithError()
 }

} }

private func handleImages (content: NSExtensionItem, attachment: NSItemProvider, index: Int) { attachment.loadItem(forTypeIdentifier: imageContentType, options: nil) { [weak self] data, error in

 if error == nil, let url = data as? URL, let this = self {
   //  this.redirectToHostApp(type: .media)
   // Always copy
   let fileExtension = this.getExtension(from: url, type: .video)
   let newName = UUID().uuidString
   let newPath = FileManager.default
     .containerURL(forSecurityApplicationGroupIdentifier: "group.\(this.hostAppBundleIdentifier)")!
     .appendingPathComponent("\(newName).\(fileExtension)")
   let copied = this.copyFile(at: url, to: newPath)
   if(copied) {
     this.sharedMedia.append(SharedMediaFile(path: newPath.absoluteString, thumbnail: nil, duration: nil, type: .image))
   }

   // If this is the last item, save imagesData in userDefaults and redirect to host app
   if index == (content.attachments?.count)! - 1 {
     let userDefaults = UserDefaults(suiteName: "group.\(this.hostAppBundleIdentifier)")
     userDefaults?.set(this.toData(data: this.sharedMedia), forKey: this.sharedKey)
     userDefaults?.synchronize()
     this.redirectToHostApp(type: .media)
   }

 } else {
   self?.dismissWithError()
 }

} }

private func handleVideos (content: NSExtensionItem, attachment: NSItemProvider, index: Int) { attachment.loadItem(forTypeIdentifier: videoContentType, options:nil) { [weak self] data, error in

 if error == nil, let url = data as? URL, let this = self {

   // Always copy
   let fileExtension = this.getExtension(from: url, type: .video)
   let newName = UUID().uuidString
   let newPath = FileManager.default
     .containerURL(forSecurityApplicationGroupIdentifier: "group.\(this.hostAppBundleIdentifier)")!
     .appendingPathComponent("\(newName).\(fileExtension)")
   let copied = this.copyFile(at: url, to: newPath)
   if(copied) {
     guard let sharedFile = this.getSharedMediaFile(forVideo: newPath) else {
       return
     }
     this.sharedMedia.append(sharedFile)
   }

   // If this is the last item, save imagesData in userDefaults and redirect to host app
   if index == (content.attachments?.count)! - 1 {
     let userDefaults = UserDefaults(suiteName: "group.\(this.hostAppBundleIdentifier)")
     userDefaults?.set(this.toData(data: this.sharedMedia), forKey: this.sharedKey)
     userDefaults?.synchronize()
     this.redirectToHostApp(type: .media)
   }

 } else {
   self?.dismissWithError()
 }

} }

private func handleFiles (content: NSExtensionItem, attachment: NSItemProvider, index: Int) { attachment.loadItem(forTypeIdentifier: fileURLType, options: nil) { [weak self] data, error in

 if error == nil, let url = data as? URL, let this = self {
   // Always copy
   let newName = this.getFileName(from :url)
   let newPath = FileManager.default
     .containerURL(forSecurityApplicationGroupIdentifier: "group.\(this.hostAppBundleIdentifier)")!
     .appendingPathComponent("\(newName)")
   let copied = this.copyFile(at: url, to: newPath)
   if (copied) {
     this.sharedMedia.append(SharedMediaFile(path: newPath.absoluteString, thumbnail: nil, duration: nil, type: .file))
   }

   if index == (content.attachments?.count)! - 1 {
     let userDefaults = UserDefaults(suiteName: "group.\(this.hostAppBundleIdentifier)")
     userDefaults?.set(this.toData(data: this.sharedMedia), forKey: this.sharedKey)
     userDefaults?.synchronize()
     this.redirectToHostApp(type: .file)
   }

 } else {
   self?.dismissWithError()
 }

} }

private func dismissWithError() { print("[ERROR] Error loading data!") let alert = UIAlertController(title: "Error", message: "Error loading data", preferredStyle: .alert)

let action = UIAlertAction(title: "Error", style: .cancel) { _ in self.dismiss(animated: true, completion: nil) }

alert.addAction(action) present(alert, animated: true, completion: nil) extensionContext!.completeRequest(returningItems: [], completionHandler: nil) }

private func redirectToHostApp(type: RedirectType) { let url = URL(string: "(shareProtocol)://dataUrl=(sharedKey)#(type)") var responder = self as UIResponder? let selectorOpenURL = sel_registerName("openURL:")

while (responder != nil) { if (responder?.responds(to: selectorOpenURL))! { let _ = responder?.perform(selectorOpenURL, with: url) } responder = responder!.next } extensionContext!.completeRequest(returningItems: [], completionHandler: nil) }

enum RedirectType { case media case text case file }

func getExtension(from url: URL, type: SharedMediaType) -> String { let parts = url.lastPathComponent.components(separatedBy: ".") var ex: String? = nil if (parts.count > 1) { ex = parts.last }

if (ex == nil) { switch type { case .image: ex = "PNG" case .video: ex = "MP4" case .file: ex = "TXT" } } return ex ?? "Unknown" }

func getFileName(from url: URL) -> String { var name = url.lastPathComponent

if (name == "") { name = UUID().uuidString + "." + getExtension(from: url, type: .file) }

return name }

func copyFile(at srcURL: URL, to dstURL: URL) -> Bool { do { if FileManager.default.fileExists(atPath: dstURL.path) { try FileManager.default.removeItem(at: dstURL) } try FileManager.default.copyItem(at: srcURL, to: dstURL) } catch (let error) { print("Cannot copy item at (srcURL) to (dstURL): (error)") return false } return true }

private func getSharedMediaFile(forVideo: URL) -> SharedMediaFile? { let asset = AVAsset(url: forVideo) let duration = (CMTimeGetSeconds(asset.duration) * 1000).rounded() let thumbnailPath = getThumbnailPath(for: forVideo)

if FileManager.default.fileExists(atPath: thumbnailPath.path) { return SharedMediaFile(path: forVideo.absoluteString, thumbnail: thumbnailPath.absoluteString, duration: duration, type: .video) }

var saved = false let assetImgGenerate = AVAssetImageGenerator(asset: asset) assetImgGenerate.appliesPreferredTrackTransform = true // let scale = UIScreen.main.scale assetImgGenerate.maximumSize = CGSize(width: 360, height: 360) do { let img = try assetImgGenerate.copyCGImage(at: CMTimeMakeWithSeconds(600, preferredTimescale: Int32(1.0)), actualTime: nil) try UIImage.pngData(UIImage(cgImage: img))()?.write(to: thumbnailPath) saved = true } catch { saved = false }

return saved ? SharedMediaFile(path: forVideo.absoluteString, thumbnail: thumbnailPath.absoluteString, duration: duration, type: .video) : nil

}

private func getThumbnailPath(for url: URL) -> URL { let fileName = Data(url.lastPathComponent.utf8).base64EncodedString().replacingOccurrences(of: "==", with: "") let path = FileManager.default .containerURL(forSecurityApplicationGroupIdentifier: "group.(hostAppBundleIdentifier)")! .appendingPathComponent("(fileName).jpg") return path }

class SharedMediaFile: Codable { var path: String; // can be image, video or url path. It can also be text content var thumbnail: String?; // video thumbnail var duration: Double?; // video duration in milliseconds var type: SharedMediaType;

init(path: String, thumbnail: String?, duration: Double?, type: SharedMediaType) { self.path = path self.thumbnail = thumbnail self.duration = duration self.type = type }

// Debug method to print out SharedMediaFile details in the console func toString() { print("[SharedMediaFile] \n\tpath: (self.path)\n\tthumbnail: (self.thumbnail)\n\tduration: (self.duration)\n\ttype: (self.type)") } }

enum SharedMediaType: Int, Codable { case image case video case file }

func toData(data: [SharedMediaFile]) -> Data { let encodedData = try? JSONEncoder().encode(data) return encodedData! } }

extension Array { subscript (safe index: UInt) -> Element? { return Int(index) < count ? self[Int(index)] : nil } }

`

[itsminh99]

After I select the text file(.txt, .csv, .tsv) it doesn't redirect to the host app and doesn't receive any files in my app.

[itsminh99]

I solved using handleFiles function. The reason is because .txt, .csv, .tsv run handleText function case.

[pavelustenko]

@itsminh99 could you provide your solution, please?