iOS声音无法在Swift中播放

Question

I'm building a tableview in which each cell represents a sound that is played when the user taps that particular cell.

In objective-C it worked fine, but now that Apple released Swift I decided to move over instantly, but for some reason the sound does not play. My code when the user taps the cell:

func tableView(tableView: UITableView!, didSelectRowAtIndexPath indexPath: NSIndexPath!) {
    var currentItem = self.items[indexPath.row]

    var audioPath = NSString(string: NSBundle.mainBundle().pathForResource(currentItem.soundID, ofType: "mp3"))

    println(audioPath)

    var audioPlayer = AVAudioPlayer(contentsOfURL: NSURL(string: audioPath), error: nil)
    audioPlayer.play()
}

currentItem is the object in the array that has to be called. Each sound I can play is put in a custom object, together with a title and an image. that object is put in an instance of currentItem .

This is what the printNL outputs when I tapp one of my cells:

/private/var/mobile/Containers/Bundle/Application/ADF0CAFC-4C9E-475E-B3F0-CD85A1873CA5/Juichen.app/StupidQuestion.mp3

it does not give an error. I already tried moving the sound file to other folders, but that does not solve the problem either. therefore, I assume that this problem occurs because I am calling the audioPlayer incorrect?

Any help would be highly appreciated!

Answer 1

Let say you have a class myTable:

class myTable : UITableViewController
{
    var audioPlayer:AVAudioPlayer? = nil

...
}

And to initialize audioPlayer :

func tableView(tableView: UITableView!, didSelectRowAtIndexPath indexPath: NSIndexPath!) 
{
        var currentItem = self.items[indexPath.row]

        var audioPath = NSString(string: NSBundle.mainBundle().pathForResource(currentItem.soundID, ofType: "mp3"))

        println(audioPath)

        var error : NSError? = nil
        self.audioPlayer = AVAudioPlayer(contentsOfURL: NSURL(string: audioPath), error: &error)

        if (self.audioPlayer == nil)
        {
            if let playerError = error as? NSError
            {
                let des : String? = playerError.localizedDescription
                println("Error: \(des)")
            }
        }
        else
        {
            self.audioPlayer.play()
        }
}

Hope this helps.