Playing system sound without importing your own

Question

Is it possible to play already existing system sounds without importing your own?

Answer 1

For swift, you can have a look at complete list of system sounds and ringtones example.

Edit: Ok, here are the most important peaces of code from this example:

    ///The directories where sound files are located.
    let rootSoundDirectories: [String] = ["/Library/Ringtones", "/System/Library/Audio/UISounds"]

    ///Array to hold directories when we find them.
    var directories: [String] = []

    ///Tuple to hold directories and an array of file names within.
    var soundFiles: [(directory: String, files: [String])] = []

    //Starting with the "/Library/Ringtones" & "/System/Library/Audio/UISounds" directories, it looks for other sub-directories just one level lower and saves their relative path in directories array.
    //- URLs: All of the contents of the directory (files and sub-directories).
    func getDirectories() {
        let fileManager: NSFileManager = NSFileManager()
        for directory in rootSoundDirectories {
            let directoryURL: NSURL = NSURL(fileURLWithPath: "\(directory)", isDirectory: true)

            do {
                if let URLs: [NSURL] = try fileManager.contentsOfDirectoryAtURL(directoryURL, includingPropertiesForKeys: [NSURLIsDirectoryKey], options: NSDirectoryEnumerationOptions()) {
                    var urlIsaDirectory: ObjCBool = ObjCBool(false)
                    for url in URLs {
                        if fileManager.fileExistsAtPath(url.path!, isDirectory: &urlIsaDirectory) {
                            if urlIsaDirectory {
                                let directory: String = "\(url.relativePath!)"
                                let files: [String] = []
                                let newSoundFile: (directory: String, files: [String]) = (directory, files)
                                directories.append("\(directory)")
                                soundFiles.append(newSoundFile)
                            }
                        }
                    }
                }
            } catch {
                debugPrint("\(error)")
            }
        }
    }

    //For each directory, it looks at each item (file or directory) and only appends the sound files to the soundfiles[i]files array.
    //- URLs: All of the contents of the directory (files and sub-directories).
        func loadSoundFiles() {
            for i in 0...directories.count-1 {
                let fileManager: NSFileManager = NSFileManager()
                let directoryURL: NSURL = NSURL(fileURLWithPath: directories[i], isDirectory: true)

                do {
                    if let URLs: [NSURL] = try fileManager.contentsOfDirectoryAtURL(directoryURL, includingPropertiesForKeys: [NSURLIsDirectoryKey], options: NSDirectoryEnumerationOptions()) {
                        var urlIsaDirectory: ObjCBool = ObjCBool(false)
                        for url in URLs {
                            if fileManager.fileExistsAtPath(url.path!, isDirectory: &urlIsaDirectory) {
                                if !urlIsaDirectory {
                                    soundFiles[i].files.append("\(url.lastPathComponent!)")
                                }
                            }
                        }
                    }
                } catch {
                    debugPrint("\(error)")
                }
            }
        }

The example shows the system sound files in a table view. Sounds are played as shown in this function:

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
        //Play the sound
        let directory: String = soundFiles[indexPath.section].directory
        let fileName: String = soundFiles[indexPath.section].files[indexPath.row]
        let fileURL: NSURL = NSURL(fileURLWithPath: "\(directory)/\(fileName)")
        do {
            model.audioPlayer = try AVAudioPlayer(contentsOfURL: fileURL)
            model.audioPlayer.play()
        } catch {
            debugPrint("\(error)")
        }
    }

Where model.audioPlayer is just an instance of AVAudioPlayer:

///Audio player responsible for playing sound files.
var audioPlayer: AVAudioPlayer = AVAudioPlayer()