I have got multiple audio files on server.
I want to download all audio files first, and then when all are downloaded, i need to play them one after another.
What will be the best approach to achieve this?
Thanks!
if let audioUrl = URL(string: "http://freetone.org/ring/stan/iPhone_5-Alarm.mp3") {
// then lets create your document folder url
let documentsDirectoryURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
// lets create your destination file url
let destinationUrl = documentsDirectoryURL.appendingPathComponent(audioUrl.lastPathComponent)
print(destinationUrl)
// to check if it exists before downloading it
if FileManager.default.fileExists(atPath: destinationUrl.path) {
print("The file already exists at path")
// if the file doesn't exist
} else {
// you can use NSURLSession.sharedSession to download the data asynchronously
URLSession.shared.downloadTask(with: audioUrl, completionHandler: { (location, response, error) -> Void in
guard let location = location, error == nil else { return }
do {
// after downloading your file you need to move it to your destination url
try FileManager.default.moveItem(at: location, to: destinationUrl)
print("File moved to documents folder")
} catch let error as NSError {
print(error.localizedDescription)
}
}).resume()
}
}
Related
guard let imageData = try? Data(contentsOf: bundleURL) else {
print("Cannot turn image named \"\(gifNamed)\" into NSData")
return nil
}
I want to use GIF path in documents directory and extract the data from it not with bundleUrl but with GIF path in : file:///var/mobile/Containers/Data/Application/5615E8E1-F120-4171-A7CE-B2A9F2E8FC19/Documents/test.gif
If I understand correctly you want to get data from gif that is located in you app's Documents directory. Your code may look like that:
func getDataOf(gifNamed: String) -> Data? {
// Get url of Documents directory
let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
guard let documentsDirectory = paths.first else { return nil }
// Get url of your gif
guard let gifURL = documentsDirectory.appendingPathComponent(gifNamed) else { return nil }
// Extract the data of your gif
var data: Data?
do {
data = try Data(contentsOf: bundleURL)
} catch {
print(error)
}
return data
}
I have written a download function in my app which downloads a .mp3 file from a url and saves it into Application Support directory locally.
func urlSession(_ session: URLSession, downloadTask: URLSessionDownloadTask, didFinishDownloadingTo location: URL) {
if let url = downloadTask.originalRequest?.url {
let destinationURL = moveFileToSupportDirectory(source: location, fileName: url.lastPathComponent , subDir: "MyApp")
onDownloadComplete?(destinationURL, nil)
}
}
func moveFileToSupportDirectory(source: URL, fileName: String, subDir: String) -> URL? {
do {
let manager = FileManager.default
let directoryURL = try manager.url(for: .applicationSupportDirectory, in: .userDomainMask, appropriateFor: nil, create: true).appendingPathComponent(subDir)
let destination = directoryURL.appendingPathComponent(fileName)
do {
try FileManager.default.createDirectory (at: directoryURL, withIntermediateDirectories: true, attributes: nil)
} catch {
print("Error creating directory: \(error)")
return nil
}
if FileManager().fileExists(atPath: destination.path) {
print("File already exists [\(destination.path)]")
return destination
}
else {
print("Move from \(source.path) to destination \(destination.path)...")
try manager.moveItem(at: source, to: destination)
return destination
}
} catch {
printTrace("\(error)")
return nil
}
}
After that when user presses "Play" button, the app will retrieve the saved URL using fileName and play it locally.
The function of retrieving URL:
func getSavedURL(of name: String) -> URL? {
do {
let manager = FileManager.default
let directoryURL = try manager.url(for: .applicationSupportDirectory, in: .userDomainMask, appropriateFor: nil, create: true).appendingPathComponent("MyApp")
let destination = directoryURL.appendingPathComponent(name)
if FileManager().fileExists(atPath: destination.path) {
print("File exists [\(destination.path)]")
let isReachable = try destination.checkResourceIsReachable()
if isReachable {
print("File is reachable \(destination.absoluteString)")
return destination
} else {
print("File is unreachable")
return nil
}
}
else {
print("File \(name) doesn't exist")
return nil
}
} catch {
print("\(error)")
return nil
}
}
The question is that when I download and play it in the same build, all works perfectly. However if I start another build and play the file saved previously, the audio player will throw following error:
ExtAudioFile.cpp:193:Open: about to throw 'wht?': open audio file
[avae] AVAEInternal.h:109 [AVAudioFile.mm:134:AVAudioFileImpl: (ExtAudioFileOpenURL((CFURLRef)fileURL, &_extAudioFile)): error 2003334207
From this thread the error seems to be related to nil of audio file:
OSStatus error 2003334207 when using AVAudioPlayer
But when retrieving the URL it has already passed all the checks (i.e. exists and is reachable) and return a non-nil URL. How come the audio file cannot be played properly even though it does exist and is reachable?
Is it related to this sandbox issue?
Document directory path change when rebuild application.
But I retrieve the URL using the relative method, I think this should not happen in my case.
p.s. I use SwiftAudioPlayer to play my audio file locally. It seems to use AudioEngine inside.
I know there are a few questions pertaining to this, but they're in Objective-C.
How can I access a .txt file included in my app using Swift on an actual iPhone? I want to be able to read and write from it. Here are my project files if you want to take a look. I'm happy to add details if necessary.
Simply by searching in the app bundle for the resource
var filePath = NSBundle.mainBundle().URLForResource("file", withExtension: "txt")
However you can't write to it because it is in the app resources directory and you have to create it in the document directory to write to it
var documentsDirectory: NSURL?
var fileURL: NSURL?
documentsDirectory = NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask).last!
fileURL = documentsDirectory!.URLByAppendingPathComponent("file.txt")
if (fileURL!.checkResourceIsReachableAndReturnError(nil)) {
print("file exist")
}else{
print("file doesnt exist")
NSData().writeToURL(fileURL!,atomically:true)
}
now you can access it from fileURL
EDIT - 28 August 2018
This is how to do it in Swift 4.2
var filePath = Bundle.main.url(forResource: "file", withExtension: "txt")
To create it in the document directory
if let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).last {
let fileURL = documentsDirectory.appendingPathComponent("file.txt")
do {
if try fileURL.checkResourceIsReachable() {
print("file exist")
} else {
print("file doesnt exist")
do {
try Data().write(to: fileURL)
} catch {
print("an error happened while creating the file")
}
}
} catch {
print("an error happened while checking for the file")
}
}
Swift 3, based on Karim’s answer.
Reading
You can read files included in an app’s bundle through the bundle’s resource:
let fileURL = Bundle.main.url(forResource:"filename", withExtension: "txt")
Writing
However, you can’t write there. You will need to create a copy, preferably in the Documents directory:
func makeWritableCopy(named destFileName: String, ofResourceFile originalFileName: String) throws -> URL {
// Get Documents directory in app bundle
guard let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).last else {
fatalError("No document directory found in application bundle.")
}
// Get URL for dest file (in Documents directory)
let writableFileURL = documentsDirectory.appendingPathComponent(destFileName)
// If dest file doesn’t exist yet
if (try? writableFileURL.checkResourceIsReachable()) == nil {
// Get original (unwritable) file’s URL
guard let originalFileURL = Bundle.main.url(forResource: originalFileName, withExtension: nil) else {
fatalError("Cannot find original file “\(originalFileName)” in application bundle’s resources.")
}
// Get original file’s contents
let originalContents = try Data(contentsOf: originalFileURL)
// Write original file’s contents to dest file
try originalContents.write(to: writableFileURL, options: .atomic)
print("Made a writable copy of file “\(originalFileName)” in “\(documentsDirectory)\\\(destFileName)”.")
} else { // Dest file already exists
// Print dest file contents
let contents = try String(contentsOf: writableFileURL, encoding: String.Encoding.utf8)
print("File “\(destFileName)” already exists in “\(documentsDirectory)”.\nContents:\n\(contents)")
}
// Return dest file URL
return writableFileURL
}
Example usage:
let stuffFileURL = try makeWritableCopy(named: "Stuff.txt", ofResourceFile: "Stuff.txt")
try "New contents".write(to: stuffFileURL, atomically: true, encoding: String.Encoding.utf8)
Just a quick update for using this code with Swift 4:
Bundle.main.url(forResource:"YourFile", withExtension: "FileExtension")
And the following has been updated to account for writing the file out:
var myData: Data!
func checkFile() {
if let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).last {
let fileURL = documentsDirectory.appendingPathComponent("YourFile.extension")
do {
let fileExists = try fileURL.checkResourceIsReachable()
if fileExists {
print("File exists")
} else {
print("File does not exist, create it")
writeFile(fileURL: fileURL)
}
} catch {
print(error.localizedDescription)
}
}
}
func writeFile(fileURL: URL) {
do {
try myData.write(to: fileURL)
} catch {
print(error.localizedDescription)
}
}
This particular example is not the most flexible, but with a little bit of work you can easily pass in your own file names, extensions and data values.
🎁 Property Wrapper - Fetch and convert to correct data type
This simple wrapper helps you to load any file from any bundle in a cleanest way:
#propertyWrapper struct BundleFile<DataType> {
let name: String
let type: String
let fileManager: FileManager = .default
let bundle: Bundle = .main
let decoder: (Data) -> DataType
var wrappedValue: DataType {
guard let path = bundle.path(forResource: name, ofType: type) else { fatalError("Resource not found: \(name).\(type)") }
guard let data = fileManager.contents(atPath: path) else { fatalError("Can not load file at: \(path)") }
return decoder(data)
}
}
Usage:
#BundleFile(name: "avatar", type: "jpg", decoder: { UIImage(data: $0)! } )
var avatar: UIImage
You can define any decoder to match your needs
Get File From Bundle in Swift 5.1
//For Video File
let stringPath = Bundle.main.path(forResource: "(Your video file name)", ofType: "mov")
let urlVideo = Bundle.main.url(forResource: "Your video file name", withExtension: "mov")
Bundles are read only. You can use NSBundle.mainBundle().pathForResource to access the file as read-only, but for read-write access you need to copy your document to Documents folder or tmp folder.
Bundles can be written. You can use Bundle.main.path to overwrite file by adding it into Copy Bundles Resource.
I have to use a file from another bundle. So, following code worked for me. Needful when you work with a frameworks.
let bundle = Bundle(for: ViewController.self)
let fileName = bundle.path(forResource: "fileName", ofType: "json")
Im using this below method to download and save my video to gallery, with .mp4 it's work normally, but when change to .m3u8 it's always fail.
func downloadVideoLinkAndCreateAsset(_ videoLink: String,_ fileName : String) {
// use guard to make sure you have a valid url
guard let videoURL = URL(string: videoLink) else { return }
guard let documentsDirectoryURL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first else { return }
let fileNameToSave = "CiviX_HistoryVideo_\(fileName)"
// check if the file already exist at the destination folder if you don't want to download it twice
if !FileManager.default.fileExists(atPath: documentsDirectoryURL.appendingPathComponent(fileNameToSave).path) {
// set up your download task
URLSession.shared.downloadTask(with: videoURL) { (location, response, error) -> Void in
// use guard to unwrap your optional url
guard let location = location else { return }
// create a deatination url with the server response suggested file name
let destinationURL = documentsDirectoryURL.appendingPathComponent(fileNameToSave)
print("destinationURL: \(destinationURL)")
do {
try FileManager.default.moveItem(at: location, to: destinationURL)
PHPhotoLibrary.requestAuthorization({ (authorizationStatus: PHAuthorizationStatus) -> Void in
// check if user authorized access photos for your app
if authorizationStatus == .authorized {
PHPhotoLibrary.shared().performChanges({
PHAssetChangeRequest.creationRequestForAssetFromVideo(atFileURL: destinationURL)}) { completed, error in
if completed {
print("Video asset created")
} else {
print("Video asset create failed: \(error?.localizedDescription)")
}
}
}
})
} catch { print("file manager error: \(error.localizedDescription)") }
}.resume()
} else {
print("File already exists at destination url")
}
}
then here is method to call
let urlString = response.replacingOccurrences(of: "\"", with: "") -> my m3u8 URL
let videoImageUrl = "https://www.sample-videos.com/video123/mp4/720/big_buck_bunny_720p_1mb.mp4" -> always success
//TEST MP4 file -> ALWAYS SUCCESS
self.downloadVideoLinkAndCreateAsset(videoImageUrl, "big_buck_bunny_720p_1mb.mp4")
//TEST M3U8 FIlE -> FAIL
self.downloadVideoLinkAndCreateAsset(urlString, history.fileName!) -> fileName format is 'abc.mp4'
The log result for MP4
destinationURL: file:///Users/thehe/Library/Developer/CoreSimulator/Devices/05C6DE76-6609-4E4A-B00D-2CE3622D2EF8/data/Containers/Data/Application/90994674-6C07-47F9-A880-D1A80CDA0C27/Documents/CiviX_HistoryVideo_big_buck_bunny_720p_1mb.mp4
-> Video asset created
THe log result for M3U8
self.downloadVideoLinkAndCreateAsset(urlString, history.fileName!)
destinationURL: file:///Users/thehe/Library/Developer/CoreSimulator/Devices/05C6DE76-6609-4E4A-B00D-2CE3622D2EF8/data/Containers/Data/Application/DA6ABC38-4E0A-44C7-9C56-8B65F1DC0D4D/Documents/CiviX_HistoryVideo_20-1-2019_3h18m32s.mp4
-> Video asset create failed: Optional("The operation couldn’t be completed. (Cocoa error -1.)")
I also tried to save with .m3u8 extension but still not working
self.downloadVideoLinkAndCreateAsset(urlString, "TEST_M3U8_FILE.m3u8")
destinationURL: file:///Users/thehe/Library/Developer/CoreSimulator/Devices/05C6DE76-6609-4E4A-B00D-2CE3622D2EF8/data/Containers/Data/Application/9B42A55B-4E3E-4A20-A0DC-6E1ED22471A2/Documents/CiviX_HistoryVideo_TEST_M3U8_FILE.m3u8
-> Video asset create failed: Optional("The operation couldn’t be completed. (Cocoa error -1.)")
M3U8 is an audio/video playlist file and it cannot be saved to the gallery.
I use following method to add file (download) to document directory:
static func downloadFileWithLink(linkString : String){
// Create destination URL
let documentsUrl:URL = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first as URL!
let destinationFileUrl = documentsUrl.appendingPathComponent("downloadedFile")
//Create URL to the source file you want to download
let fileURL = URL(string: linkString)
let sessionConfig = URLSessionConfiguration.default
let session = URLSession(configuration: sessionConfig)
let request = URLRequest(url:fileURL!)
let task = session.downloadTask(with: request) { (tempLocalUrl, response, error) in
if let tempLocalUrl = tempLocalUrl, error == nil {
// Success
if let statusCode = (response as? HTTPURLResponse)?.statusCode {
print("Successfully downloaded. Status code: \(statusCode)")
}
do {
try FileManager.default.copyItem(at: tempLocalUrl, to: destinationFileUrl)
} catch (let writeError) {
print("Error creating a file \(destinationFileUrl) : \(writeError)")
}
} else {
print("Error took place while downloading a file. Error description: %#", error?.localizedDescription);
}
}
task.resume()
}
It simply download file to document folder in sandbox. I looked for method that delete files in documents folder, and tried following:
static func deleteFiledInDocDirectory(){
let fileManager = FileManager.default
let tempFolderPath = NSTemporaryDirectory()
do {
let filePaths = try fileManager.contentsOfDirectory(atPath: tempFolderPath)
for filePath in filePaths {
try fileManager.removeItem(atPath: tempFolderPath + filePath)
}
} catch {
print("Could not clear temp folder: \(error)")
}
}
However, when i inspect sandbox, downloaded file is still here. How to delete it?
In deleteFiledInDocDirectory() you're using NSTemporaryDirectory instead of the documents directory that you originally saved the file to.
Change tempFolderPath to be set using following:
guard let tempFolderPath = fileManager.urls(for: .documentDirectory, in: .userDomainMask).first else {
return // documents directory not found for some reason
}
The full method:
static func deleteFiledInDocDirectory(){
guard let tempFolderPath = fileManager.urls(for: .documentDirectory, in: .userDomainMask).first?.absoluteString else {
return // documents directory not found for some reason
}
let fileManager = FileManager.default
do {
let filePaths = try fileManager.contentsOfDirectory(atPath: tempFolderPath)
for filePath in filePaths {
try fileManager.removeItem(atPath: tempFolderPath + filePath)
}
} catch {
print("Could not clear temp folder: \(error)")
}
}