Ios 在swift中制作播放列表(开始下一首歌曲)
我已经创建了一个声音播放器在斯威夫特与AVFoundation。当播放歌曲结束时,我正在尝试开始阵列中的下一首歌曲。我试图实现这个代码Ios 在swift中制作播放列表(开始下一首歌曲),ios,swift,avfoundation,avaudioplayer,playlist,Ios,Swift,Avfoundation,Avaudioplayer,Playlist,我已经创建了一个声音播放器在斯威夫特与AVFoundation。当播放歌曲结束时,我正在尝试开始阵列中的下一首歌曲。我试图实现这个代码 if (audioPlayer.currentTime >= audioPlayer.duration){ var recentSong = songPlaylist[selectedSongNumber + 1] audioPlayer = AVAudioPlayer(contentsOfURL: NSURL(fileURLWithPat
if (audioPlayer.currentTime >= audioPlayer.duration){
var recentSong = songPlaylist[selectedSongNumber + 1]
audioPlayer = AVAudioPlayer(contentsOfURL: NSURL(fileURLWithPath:
NSBundle.mainBundle().pathForResource(recentSong, ofType: "mp3")!), error: nil)
audioPlayer.play()
}
但是我不能实现这个代码(我不知道在哪里实现它)
import UIKit
import AVFoundation
import AVKit
public var audioPlayer = AVPlayer()
public var selectedSongNumber = Int()
public var songPlaylist:[String] = ["song1", "song2"]
public var recentSong = "song1"
let playImage = UIImage(named: "Play.png") as UIImage!
let pauseImage = UIImage(named: "Pause.png") as UIImage!
class FirstViewController: UIViewController {
@IBOutlet weak var musicSlider: UISlider!
@IBOutlet weak var PlayPause: UIButton!
var audioPlayer = AVAudioPlayer(contentsOfURL: NSURL(fileURLWithPath:
NSBundle.mainBundle().pathForResource(recentSong, ofType: "mp3")!), error: nil)
override func viewDidLoad() {
super.viewDidLoad()
musicSlider.maximumValue = Float(audioPlayer.duration)
var timer = NSTimer.scheduledTimerWithTimeInterval(0.1, target: self, selector: Selector("updateMusicSlider"), userInfo: nil, repeats: true)
if (audioPlayer.currentTime >= audioPlayer.duration){
var recentSong = songPlaylist[selectedSongNumber + 1]
audioPlayer = AVAudioPlayer(contentsOfURL: NSURL(fileURLWithPath:
NSBundle.mainBundle().pathForResource(recentSong, ofType: "mp3")!), error: nil)
audioPlayer.play()
}
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
@IBAction func PlayPauseButton(sender: AnyObject) {
if (audioPlayer.playing == false){
audioPlayer.play()
PlayPause.setImage(pauseImage, forState: .Normal)
}else{
audioPlayer.pause()
PlayPause.setImage(playImage, forState: .Normal)
}
}
@IBAction func StopButton(sender: AnyObject) {
audioPlayer.stop()
audioPlayer.currentTime = 0
PlayPause.setImage(playImage, forState: .Normal)
}
@IBAction func musicSliderAction(sender: UISlider) {
audioPlayer.stop()
audioPlayer.currentTime = NSTimeInterval(musicSlider.value)
audioPlayer.play()
}
func updateMusicSlider(){
musicSlider.value = Float(audioPlayer.currentTime)
}
}
您需要实现
AVAudioPlayerDelegate
协议的方法:
optional func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer!, successfully flag: Bool)
在此处播放下一个音乐项目
但是我不推荐,因为
AVAudioPlayer
一次只能播放一个项目。完成后,您需要使用另一个音乐项再次实例化。我建议您使用AVQueuePlayer
。给出了详细的答案。希望有帮助 我正在用不同的东西更新代码:
import UIKit
import AVFoundation
class ViewController: UIViewController, AVAudioPlayerDelegate {
var counter = 0
var song = ["1","2","3"]
var player = AVAudioPlayer()
@IBOutlet weak var musicSlider: UISlider!
override func viewDidLoad() {
super.viewDidLoad()
musicSlider.value = 0.0
}
func updateMusicSlider(){
musicSlider.value = Float(player.currentTime)
}
@IBAction func playSong(sender: AnyObject) {
music()
}
@IBAction func sliderAction(sender: AnyObject) {
player.stop()
player.currentTime = NSTimeInterval(musicSlider.value)
player.play()
}
func music(){
var audioPath = NSBundle.mainBundle().pathForResource("\(song[counter])", ofType: "mp3")!
var error : NSError? = nil
player = AVAudioPlayer(contentsOfURL: NSURL(string: audioPath), error: &error)
musicSlider.maximumValue = Float(player.duration)
var timer = NSTimer.scheduledTimerWithTimeInterval(0.05, target: self, selector: Selector("updateMusicSlider"), userInfo: nil, repeats: true)
player.delegate = self
if error == nil {
player.delegate = self
player.prepareToPlay()
player.play()
}
}
func audioPlayerDidFinishPlaying(player: AVAudioPlayer!, successfully flag: Bool)
{
println("Called")
if flag {
counter++
}
if ((counter + 1) == song.count) {
counter = 0
}
music()
}
}
你可以这样做
希望它能有所帮助,并且是获取更多信息的示例项目。我用AVFoundation在swift中创建了一个声音播放器。我使用progressView对歌曲计时,当它达到0.98743时,它将自动更新到下一首歌曲这是Github链接:
实际上,我知道我在做更多的测试,我刚刚意识到下一首歌在第一首歌结束后只开始一次,但当第二首歌结束时,第三首歌没有开始播放,即使我从第二首歌回到第一首歌,第二首歌也没有开始播放。我想问题可能是
播放器:AVAudioPlayer
没有更新,有什么建议吗?
func updateProgressView() {
if (progressView.progress > a.advanced(by: 0.98743)) {
audioPlayerDidFinishPlayeing()
}
if audioPlayer.isPlaying {
let progress = Float(audioPlayer.currentTime/audioPlayer.duration)
progressView.setProgress(progress, animated: true)
}
}