如何在第一首歌结束时自动播放下一首歌

Question

我把歌放进桌子里，我想当第一首歌唱完后，在桌子上播放下一首歌。>>

 func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {


    if  let audio=NSBundle.mainBundle().pathForResource( elmp3[indexPath.row] , ofType: "mp3")
    {
        let url=NSURL (fileURLWithPath: audio)

        do {


            player = try AVAudioPlayer (contentsOfURL: url)

        }

        catch{"erorr"}

当你按下塞尔歌曲时，播放同样的视图。

这是数组歌曲

var elmp3 = ["001","002","003","004","005","006","007","008","009","010","011","012","013","014","015","016","017","018","019","020","021","022","023","024","025","026","027","028","029"]

Answer 1

1. 为selectedIndex创建一个实例变量。
2. 在selectedIndex : method中将indexPath.row更新为indexPath.row。
3. 实现AVAudioPlayerDelegate方法并为AVAudioPlayer实例设置委托。
4. 在audioPlayerDidFinishPlaying:回调方法中，增加selectedIndex并在列表中播放下一个音频。

以下是以下步骤：

1.

var selectedIndex:Int = 0

2.

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {

//Set selected index
self.selectedIndex = indexPath.row

//get audio file URL at index
if  let audio=NSBundle.mainBundle().pathForResource( elmp3[self.selectedIndex] , ofType: "mp3")
{
    let url=NSURL (fileURLWithPath: audio)

    do {


        player = try AVAudioPlayer (contentsOfURL: url)
        //Set delegate for AVAudioPlayer
        player.delegate = self

    }

    catch{"error"}

 }

class AudioPlayerController:UIViewController, AVAudioPlayerDelegate{

func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer,
                         successfully flag: Bool){

if flag == true && self.selectedIndex < elmp3.count{

//Increment current index
++ self.selectedIndex
 //Load audio at current index and play
 if  let audio=NSBundle.mainBundle().pathForResource( elmp3[self.selectedIndex] , ofType: "mp3")
{
    let url=NSURL (fileURLWithPath: audio)

    do {
        player = try AVAudioPlayer (contentsOfURL: url)
        player.delegate = self

    }

    catch{"error"}


}
}
}