Bill Bill - 4 months ago 13
iOS Question

Cannot list recorded files to a TableView

I am in some desperate need of assistance, since my head is really sore from beating it against the wall.

I have one view controller where I am recording audio with my microphone and saving it to the apps document directory. This is working well and I can see the files if I navigate to that folder in the simulator.

My problem is that I have a TableView with its own TableViewController where I want to list the contents of that document directory that contains my recordings. I created the TableView and it is reading and populating the table based on a basic array. My problem is that I am failing to convert it over to read the Document Directory contents instead.

I have future goals for this table to also allow me play, delete, or rename the file from within this TableView via swiping the particular cell.

I have been working on this issue for about 5 days now and I am certain I am overlooking something very simple to you all.

I am using Xcode 7.3.1 with Swift 2.

Thanks in advance and I can't wait until I get to a point where I can contribute.

ViewControllerRecorder.swift
(This is where I record and save the audio to the Document Directory, which is working.)

import UIKit
import AVFoundation
import PermissionScope

class ViewControllerRecorder: UIViewController, AVAudioRecorderDelegate, AVAudioPlayerDelegate {

@IBOutlet weak var stopButton: UIButton!
@IBOutlet weak var recordButton: UIButton!
@IBOutlet weak var playButton: UIButton!

@IBOutlet weak var audioDuration: UISlider!


var audioRecorder:AVAudioRecorder?
var audioPlayer:AVAudioPlayer?

let pscope = PermissionScope()


override func viewDidLoad() {
super.viewDidLoad()

audioDuration.value = 0.0

// Set up permissions
pscope.addPermission(MicrophonePermission(),
message: "Inorder to use this app, you need to grant the microphone permission")

// Show dialog with callbacks
pscope.show({ finished, results in
print("got results \(results)")
}, cancelled: { (results) -> Void in
print("thing was cancelled")
})

// Disable Stop/Play button when application launches
stopButton.enabled = false
playButton.enabled = false




// Get the document directory. If fails, just skip the rest of the code
guard let directoryURL = NSFileManager.defaultManager().URLsForDirectory(NSSearchPathDirectory.DocumentDirectory, inDomains: NSSearchPathDomainMask.UserDomainMask).first else {

let alertMessage = UIAlertController(title: "Error", message: "Failed to get the document directory for recording the audio. Please try again later.", preferredStyle: .Alert)
alertMessage.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
presentViewController(alertMessage, animated: true, completion: nil)

return
}

// Set the default audio file
let audioFileURL = directoryURL.URLByAppendingPathComponent("PWAC_" + NSUUID().UUIDString + ".m4a")

// Setup audio session
let audioSession = AVAudioSession.sharedInstance()

do {
try audioSession.setCategory(AVAudioSessionCategoryPlayAndRecord, withOptions: AVAudioSessionCategoryOptions.DefaultToSpeaker)




// Define the recorder setting
let recorderSetting: [String: AnyObject] = [
AVFormatIDKey: Int(kAudioFormatMPEG4AAC),
AVSampleRateKey: 32000.0,
AVNumberOfChannelsKey: 2,
AVEncoderAudioQualityKey: AVAudioQuality.Medium.rawValue
]

// Initiate and prepare the recorder
audioRecorder = try AVAudioRecorder(URL: audioFileURL, settings: recorderSetting)
audioRecorder?.delegate = self
audioRecorder?.meteringEnabled = true
audioRecorder?.prepareToRecord()

} catch {
print(error)
}

}


func updateaudioDuration(){

audioDuration.value = Float(audioPlayer!.currentTime)
}

@IBAction func sliderAction(sender: AnyObject) {


audioPlayer!.currentTime = NSTimeInterval(audioDuration.value)

}

override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}

@IBAction func play(sender: AnyObject) {
if let recorder = audioRecorder {
if !recorder.recording {
do {
audioPlayer = try AVAudioPlayer(contentsOfURL: recorder.url)

audioDuration.maximumValue = Float(audioPlayer!.duration)
_ = NSTimer.scheduledTimerWithTimeInterval(0.05, target: self, selector: #selector(ViewControllerRecorder.updateaudioDuration), userInfo: nil, repeats: true)

audioPlayer?.delegate = self
audioPlayer?.play()
playButton.setImage(UIImage(named: "playing"), forState: UIControlState.Selected)
playButton.selected = true
} catch {
print(error)
}
}
}
}

@IBAction func stop(sender: AnyObject) {
recordButton.setImage(UIImage(named: "record"), forState: UIControlState.Normal)
recordButton.selected = false
playButton.setImage(UIImage(named: "play"), forState: UIControlState.Normal)
playButton.selected = false

stopButton.enabled = false
playButton.enabled = true

audioRecorder?.stop()

let audioSession = AVAudioSession.sharedInstance()

do {
try audioSession.setActive(false)
} catch {
print(error)
}
}

@IBAction func record(sender: AnyObject) {
// Stop the audio player before recording
if let player = audioPlayer {
if player.playing {
player.stop()
playButton.setImage(UIImage(named: "play"), forState: UIControlState.Normal)
playButton.selected = false
}
}

if let recorder = audioRecorder {
if !recorder.recording {
let audioSession = AVAudioSession.sharedInstance()

do {
try audioSession.setActive(true)

// Start recording
recorder.record()
recordButton.setImage(UIImage(named: "recording"), forState: UIControlState.Selected)
recordButton.selected = true


} catch {
print(error)
}

} else {
// Pause recording
recorder.pause()
recordButton.setImage(UIImage(named: "pause"), forState: UIControlState.Normal)
recordButton.selected = false
}
}

stopButton.enabled = true
playButton.enabled = false

}


// MARK: - AVAudioRecorderDelegate Methods
func audioRecorderDidFinishRecording(recorder: AVAudioRecorder, successfully flag: Bool) {
if flag {

// iOS8 and later
let alert = UIAlertController(title: "Recorder",
message: "Finished Recording",
preferredStyle: .Alert)
alert.addAction(UIAlertAction(title: "Keep", style: .Default, handler: {action in
print("keep was tapped")
}))
alert.addAction(UIAlertAction(title: "Delete", style: .Default, handler: {action in
print("delete was tapped")
self.audioRecorder!.deleteRecording()
}))

self.presentViewController(alert, animated:true, completion:nil)

// let alertMessage = UIAlertController(title: "Finish Recording", message: "Successfully recorded the audio!", preferredStyle: .Alert)
// alertMessage.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
// presentViewController(alertMessage, animated: true, completion: nil)
print("Audio has finished recording")
print(recorder.url)
}
}

// MARK: - AVAudioPlayerDelegate Methods
func audioPlayerDidFinishPlaying(player: AVAudioPlayer, successfully flag: Bool) {
playButton.setImage(UIImage(named: "play"), forState: UIControlState.Normal)
playButton.selected = false

let alertMessage = UIAlertController(title: "Finish Playing", message: "Finish playing the recording!", preferredStyle: .Alert)
alertMessage.addAction(UIAlertAction(title: "OK", style: .Default, handler: nil))
presentViewController(alertMessage, animated: true, completion: nil)
print("Audio has finished playing")
print(player.url)
}


}


ViewControllerFileManager.swift
(This is the view controller that I want to display the contents of the document directory to a TableView.)

UPDATED 2016/07/27

import UIKit

class ViewControllerFileManager: UIViewController, UITableViewDataSource, UITableViewDelegate {

var arrayRecordings = [String]()

override func viewDidLoad() {
super.viewDidLoad()

let fileManager = NSFileManager.defaultManager()
let dirPath = NSBundle.mainBundle().resourcePath!


let items = try! fileManager.contentsOfDirectoryAtPath(dirPath)

for item in items {
if item.hasSuffix("m4a") {

arrayRecordings.append(item)

}
print("Found \(item)")
}



// Do any additional setup after loading the view, typically from a nib.
}

override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}


func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
// Return the number of rows in the section.
return arrayRecordings.count
}

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

let cellIdentifier = "Cell"
let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath: indexPath)



// Configure the cell...


cell.textLabel?.text = arrayRecordings[indexPath.row]
return cell
}

override func prefersStatusBarHidden() -> Bool {
return true
}

}

Answer

Here is the code that I got working to populate a TableView with the contents of my apps Document Folder

import UIKit

class ViewControllerFileManager: UIViewController, UITableViewDataSource, UITableViewDelegate {



    var arrayRecordings = [String]()



    override func viewDidLoad() {
        super.viewDidLoad()

        // MARK: Read Document Directory and populate Array

        // Get the document directory url:
        let documentsUrl =  NSFileManager.defaultManager().URLsForDirectory(.DocumentDirectory, inDomains: .UserDomainMask).first!

        do {
            // Get the directory contents urls (including subfolders urls):
            let directoryContents = try NSFileManager.defaultManager().contentsOfDirectoryAtURL( documentsUrl, includingPropertiesForKeys: nil, options: [])
            print(directoryContents)

            // Filter directory contents:
            let audioFiles = directoryContents.filter{ $0.pathExtension == "m4a" }
            print("m4a urls:",audioFiles)

            // Get the File Names:
            let audioFileNames = audioFiles.flatMap({$0.URLByDeletingPathExtension?.lastPathComponent})
            print("m4a list:", audioFileNames)

            for audioFileName in audioFileNames {
                arrayRecordings.append(audioFileName)
                print("Found \(audioFileName)")
            }


        } catch let error as NSError {
            print(error.localizedDescription)
        }

    }


    // MARK: TableView Functions
    func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        // Return the number of rows in the section.
        return arrayRecordings.count
    }



    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

        let cellIdentifier = "Cell"
        let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath: indexPath)


        // Configure the cell...
        cell.textLabel?.text = arrayRecordings[indexPath.row]
        return cell
    }


    // MARK: Standard Functions
    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }



    override func prefersStatusBarHidden() -> Bool {
        return true
    }


}
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