I have made one demo in which i have to do download multiple video and audio so i found one library from github. But i do not know how to save donwloading progress when i quite app(means when downloading done 50% and i want to save 50% video data in Document directory but when i open app downloading start from initial)
Code which i had used in my demo.
self.progressView.setProgress(0, animated: false)
self.progressLabel.text = "0.0 %"
self.finalUrlLabel.text = ""
let request = URLRequest.init(url: URL.init(string: "http://techslides.com/demos/samples/sample.mp4")!)
let downloadKey = SDDownloadManager.shared.dowloadFile(withRequest: request,
inDirectory: directoryName,
withName: nil,
onProgress: { [weak self] (progress) in
let percentage = String(format: "%.1f %", (progress * 100))
self?.progressView.setProgress(Float(progress), animated: true)
self?.progressLabel.text = "\(percentage) %"
print("percentage",percentage)
}) { [weak self] (error, url) in
if let error = error {
print("Error is \(error as NSError)")
} else {
if let url = url {
print("Downloaded file's url is \(url.path)")
self?.finalUrlLabel.text = url.path
}
}
}
print("The key is \(downloadKey!)")
let dasd = SDDownloadManager.shared.ongoingDownloads
print("dasd",dasd.count)
If you know any other solution please help me via your best experience in downloading progress.
TIA
Edit:
I have used this Link for download For downloading video using url session. But don't know how to resume download when application terminated and open again.
first thing SDDownloadManager says Resumable Downloads not implemented yet in the framework. Its mentioned there as below
Future Enhancements
I'm planning to integrate the following features in upcoming releases :
Background Downloads.
Resumable Downloads.
so you cant achieve this using this. Instead you can use NSUrlSession to
achieve this.
Related
I'm making Audio Player.
Importing file from iCloud Drive using .fileImporter.
I get file URL that looks like this: file:///private/var/mobile/Library/Mobile%20Documents/com~apple~CloudDocs/_Storage/Audio-books/%D0%91%D1%80%D0%B5%D0%BD%D0%B4%D1%8F%D1%82%D0%B8%D0%BD%D0%B0/Audiobook.mp3"
Then I pass it to audio player (tried AVPlayer and AVAudioPlayer). Both works on iOS simulator.
On the device after import I get error: The operation couldn’t be completed. (OSStatus error -54.)
I know it's possible, app called Evermusic does quite the same with on device files.
Is there permissions I need to be granted to play audio that stored on device?
How can I access Container for com~apple~CloudDocs?
Thank you very much for help, any suggestions greatly appreciated, I'm seriously stuck.
For future references repo of the project: https://github.com/yaosamo/AudioPlayer
You need to be using startAccessingSecurityScopedResource in order to get read access to those files. See documentation:
https://developer.apple.com/documentation/foundation/nsurl/1417051-startaccessingsecurityscopedreso
https://developer.apple.com/documentation/corefoundation/1543318-cfurlstartaccessingsecurityscope
In addition to #jnpdx answer want to add some details, and my solution example.
Few core things
✅ for my app if you need to access secured audio you need to use startAccessingSecurityScopedResource()
❌ you can't simple store URL and use it later, in fact you don't store fileURL at all. You need to use what's called bookmarkData() on your URL and store it. So later you can restore URL
✅ Watch Apple pres here
Here's how I import file:
.fileImporter(isPresented: $presentImporter, allowedContentTypes: [.mp3]) { result in
switch result {
case .success(let url):
// Start accessing secured url
let StartAccess = url.startAccessingSecurityScopedResource()
defer {
// Must stop accessing once stop using
if StartAccess {
url.stopAccessingSecurityScopedResource()
}
}
// Creating new book
let newBook = Book(context: viewContext)
let _ = print("---- Access Granted?", url.startAccessingSecurityScopedResource())
// Getting bookmarkData of the URL
let bookmarkData = try? url.bookmarkData()
newBook.name = "\(url.lastPathComponent)"
// Save bookmarkURL into CoreData
newBook.urldata = bookmarkData
// Specifiying parent item in CoreData
newBook.origin = playlist.self
try? viewContext.save()
case .failure(let error):
print(error)
}
}
Player retrieving URL:
func Audioplayer(bookmarkData: Data) {
// Restore security scoped bookmark
var bookmarkDataIsStale = false
let playNow = try? URL(resolvingBookmarkData: bookmarkData, bookmarkDataIsStale: &bookmarkDataIsStale)
do {
player = try AVAudioPlayer(contentsOf: playNow!)
// Delegate listen when audio is finished
player?.delegate = del
NotificationCenter.default.addObserver(forName: NSNotification.Name("ended"), object: nil, queue: .main) { (_) in
player?.stop()
ended = true
let _ = print("---- Book has ended ----")
}
} catch let error {
print("Player Error", error.localizedDescription)
}
player?.prepareToPlay()
player?.play()
}
Thank you and again here's repo on git.
I'm using firebase with swift.
Below is my code to upload an image from an image picker, and to store the download url of the image.
the point of my code is to store the download url after uploading the image. So I'm trying to find a way to wait for the upload process to finish in order to proceed.
_ = imageRef.putData(data, metadata: nil, completion: {(metadata,error) in
guard let metadata = metadata
else{
print(error)
return
}
})
imageRef.downloadURL { (URL, error) -> Void in
if (error != nil) {
// Handle any errors
} else {
// Get the download URL for 'images/stars.jpg'
let UrlString = URL?.absoluteString}
That's what the completion handler is for. You're already passing a completion handler to putData, which will be invoked when the upload is finished. You should check the error object to make sure it completed successfully.
This is documented, along with a code sample. You can see in the sample that the download URL is fetched from inside the completion handler, only if there is no error.
I'm trying to download a youtube video on the phone so the user can later play it offline. I hooked a button to where the user can download. The code of how I'm currently downloading the video is here below.
#objc func downloadSelectedVideo() {
if let audioUrl = URL(string: "http://freetone.org/ring/stan/iPhone_5-Alarm.mp3") {
// create your document folder url
let documentsUrl = try! FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true)
// your destination file url
let destination = documentsUrl.appendingPathComponent(audioUrl.lastPathComponent)
print(destination)
// check if it exists before downloading it
if FileManager().fileExists(atPath: destination.path) {
print("The file already exists at path")
} else {
// if the file doesn't exist
// just download the data from your url
URLSession.shared.downloadTask(with: audioUrl, completionHandler: { (location, response, error) in
// after downloading your data you need to save it to your destination url
guard
let httpURLResponse = response as? HTTPURLResponse, httpURLResponse.statusCode == 200,
let mimeType = response?.mimeType, mimeType.hasPrefix("audio"),
let location = location, error == nil
else { return }
do {
try FileManager.default.moveItem(at: location, to: destination)
print("file saved")
} catch {
print(error)
}
}).resume()
}
}
}
as you can see I have hooked up the URL to a free music which is in mp3 and it works fine I can download the music and everything works just fine, however when I try to hook up a YouTube video then it never gets to the print statement file saved I tried this as the URL if let audioUrl = URL(string: "https://www.youtube.com/watch?v=3WSgJCYIewM")
but the print statement file saved never ran, but when I tried with the other I mentioned earlier it print file saved.
What URL should use to download the youtube videos, and do I have to use an mp3 or mp4 source to download the videos. I'm trying not to use any third-party sites if you can come up with any solution it would be great and helpful. Thanks
YouTube spells this out pretty specifically that you cannot do this.
YouTube API Services - Developer Policies
Found this under E. Handling YouTube Data and Content
You and your API Clients must not, and must not encourage, enable, or
require others to:
download, import, backup, cache, or store copies of YouTube
audiovisual content without YouTube's prior written approval,
IANAL, but I'd rather not go up against their legal team.
YouTube does not provide a simple URL that taps into the video or audio directly. Instead, you would have to extract thier link using some algorithm. If you'd like to achieve that I would recommend you use XCDYouTubeKit as it is well maintained and easy to use. However, If you'd like a ready made app, I have developed an open source application - YouTag - that you can simply install on your iOS device and use directly without having to go through developing one.
I am currently working on a code that downloads .m4a audio format files from Firebase and allows the user to hear the music play within the same View Controller. Through lots of research on SO and other websites, I managed to get the audio downloaded, but when the audio is supposed to be being played, I only hear static. In fact, it actually plays the entire duration of the audio clip (e.g. the audio is 6s long, so a user would hear static for exactly 6s), so I know for a fact it is actually downloading something, just nothing is playing.
Below is my source code for the download function and play music function. I tried searching this topic on SO, but there are very few articles pertaining to audio download to iOS from Firebase (mostly it seems to be "how to download images", etc.)
Thank you very much in advance!
Sam
//Function to start playing music
func playMusic(){
do {
self.audioPlay = try AVAudioPlayer(contentsOf: self.localSongURL)
self.audioPlay.delegate = self
self.audioPlay.prepareToPlay()
self.audioPlay.play()
self.audioPlay.volume = 1.0 //I tried adjusting volumes to see if it would make a difference
} catch {
createAlert(title: "File Not Found", message: "Audio downloaded cannot be interpereted.")
}
}
//Function to download music
//In the Firebase storage, songs are listed underneath an ID, so the "tillAt"s help to parse through
//the appropriate strings to get the right path for collection
func downloadMusic(){
let tillAt1 = self.songPath.components(separatedBy: ID + "/")
let tillAt2 = tillAt1[1].components(separatedBy: ".")
store = Storage.storage().reference().child(patientID).child(tillAt1[1])
//From here is where I think the issue is within
self.localSongURL = try! FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: false).appendingPathComponent(tillAt2[0] + ".m4a")
store.getData(maxSize: 128 * 1024 * 1024, completion: {(data, error) in
if let error = error {
print("Error Here _______________ Level 1")
print(error)
} else {
if let d = data {
do {
try d.write(to: self.localSongURL)
} catch {
print("Error Here _______________ Level 2")
print(error)
}
}
}
})
}
I have an API that generates signed download links that expire after a short amount of time. I'd like to add the ability to resume downloads, but the URLSession APIs don't provide the native ability to resume downloads if the URL for the asset changes.
My attempt at solving this was to track the bytes downloaded at the time of pausing, store the data blob that was downloaded, fetch a new signed download url, resume downloading using Range headers, and then concatenate all the data blobs together when the download is completed.
Here's the code used to start the download:
let session = URLSession(configuration: URLSessionConfiguration.default, delegate: self, delegateQueue: nil)
let task = session.downloadTask(with: signedURL)
self.sessionDownloadRequest = task
The problem that I am facing is that the resume data var doesn't appear to actually contain the data that was downloaded.
self.sessionDownloadRequest.cancel(byProducingResumeData: { (data) in
print(data.count) //This surprisingly always returns the same count
}
It appears that the size of that data blob is always the same regardless of how long I let the download continue for before pausing. Where/How can I access the chunk of data that was downloaded?
Thanks!
The resume data that is returned by:
- (void)cancelByProducingResumeData:(void (^)(NSData *resumeData))completionHandler;
is actually a plist that includes:
NSURLSessionDownloadURL
NSURLSessionResumeBytesReceived
NSURLSessionResumeCurrentRequest
NSURLSessionResumeEntityTag
NSURLSessionResumeInfoTempFileName
NSURLSessionResumeInfoVersion
NSURLSessionResumeOriginalRequest
NSURLSessionResumeServerDownloadDate
You can access the plist with the following code:
if let resumeDictionary = try? PropertyListSerialization.propertyList(from: self, options: PropertyListSerialization.MutabilityOptions.mutableContainersAndLeaves, format: nil), let plist = resumeDictionary as? [String: Any] {
print(plist)
}
You don't actually need to store and concatenate the data blobs as you initially suggested. You can replace the current request stored in the plist (NSURLSessionResumeCurrentRequest) with a new one with your updated signed URL. After this, create a new resumeData instance to use instead of the original.
guard let bytesReceived = plist["NSURLSessionResumeBytesReceived"] as? Int
else {
return nil
}
let headers = ["Range":"bytes=\(bytesReceived)"]
let newReq = try! URLRequest(url: signedURL, method: .get, headers: headers)
let archivedData = NSKeyedArchiver.archivedData(withRootObject: newReq)
if let updatedResumeData = try? PropertyListSerialization.data(fromPropertyList: plist, format: PropertyListSerialization.PropertyListFormat.binary, options: 0) {
return updatedResumeData
}
From there you can manipulate the plist and actually create a new one to pass it thru to the instance method:
- (NSURLSessionDownloadTask *)downloadTaskWithResumeData:(NSData *)resumeData;
NOTE: If you are working with iOS 10 and macOS10.12.*, there is a bug that prevents the resume ability to work as the plist is corrupted. Check this article out for a fix. You may need to fix the plist before accessing certain properties on it.
Resume NSUrlSession on iOS10