无法将录制的文件列出到 TableView
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【中文标题】无法将录制的文件列出到 TableView【英文标题】：Cannot list recorded files to a TableView 【发布时间】：2016-07-24 20:42:04 【问题描述】：我急需帮助，因为我的头被撞到墙上真的很痛。
我有一个视图控制器，我在其中使用麦克风录制音频并将其保存到应用程序文档目录中。这运行良好，如果我导航到模拟器中的该文件夹，我可以看到这些文件。
我的问题是我有一个带有自己的 TableViewController 的 TableView，我想在其中列出包含我的录音的文档目录的内容。我创建了 TableView，它正在读取和填充基于基本数组的表。我的问题是我无法将其转换为读取文档目录内容。
我对此表有未来的目标，还允许我通过滑动特定单元格在此 TableView 中播放、删除或重命名文件。
我已经在这个问题上工作了大约 5 天，我确信我忽略了一些对你们来说非常简单的事情。
我正在使用 Xcode 7.3.1 和 Swift 2。
提前致谢，我迫不及待地想做出贡献。
ViewControllerRecorder.swift （这是我录制音频并将其保存到正在工作的文档目录的位置。）
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 （这是我想将文档目录的内容显示到 TableView 的视图控制器。）
2016 年 7 月 27 日更新
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
【问题讨论】：
嗨！您是否已经检查过此线程：***.com/questions/8376511/…？ 您好 fiks，确实这是我尝试过的线程之一。即使认为这似乎是我的答案，我似乎也无法让它工作。我确定我将代码放在错误的位置。根据我的“ViewControllerFileManager”，您能否指导我正确实施？ 我会加载 viewDidLoad 中的文件。你试过这个吗？如果是，但它不起作用，我可以花一些时间根据你的代码实现一些东西。 我也试过了，我一定是搞砸了。此外，当我输入您向我发送链接的该页面上显示的代码时，我收到了许多错误。 如何在 ViewController 类中填充recordingFileNames 变量？ 【参考方案1】：如果你在 viewDidLoad 中填充数组，你需要调用 tableView 的 reloadData 来刷新它。
override func viewDidLoad()
super.viewDidLoad()
// populate recordingFileNames here
// refresh your table
reloadTableViewContent()
func reloadTableViewContent()
dispatch_async(dispatch_get_main_queue(), () -> Void in
self.tableView.reloadData()
self.tableView.scrollRectToVisible(CGRectMake(0, 0, 1, 1), animated: false)
)
【讨论】：
【参考方案2】：这是我使用我的应用程序文档文件夹的内容填充 TableView 的代码
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
【讨论】：
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