我想跟踪播放歌曲的时间。我从网上尝试了不同的解决方案,但他们无法解决我的问题。
我实现了audioPlayerDidFinishPlaying
方法,但它无效。
如果播放歌曲完成,我怎么能理解?
我正在使用playSound
功能
playSound func:
func playSound(name: String ) {
guard let url = Bundle.main.url(forResource: name, withExtension: "mp3") else {
print("url not found")
return
}
do {
/// this codes for making this app ready to takeover the device audio
try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
try AVAudioSession.sharedInstance().setActive(true)
/// change fileTypeHint according to the type of your audio file (you can omit this)
player = try AVAudioPlayer(contentsOf: url, fileTypeHint: AVFileTypeMPEGLayer3)
// no need for prepareToPlay because prepareToPlay is happen automatically when calling play()
player!.play()
} catch let error as NSError {
print("error: \(error.localizedDescription)")
}
}
audioPlayerDidFinishPlaying func:
func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
print("finished")//It is not working, not printing "finished"
}
如何解决我的问题?播放歌曲的方法如何完成
编辑:我正在添加整个代码。
//
// ViewController.swift
import UIKit
import SwiftVideoBackground
import AudioToolbox
import AVFoundation
class ViewController: UIViewController,AVAudioPlayerDelegate {
var player: AVAudioPlayer?
@IBOutlet weak var backgroundVideo: BackgroundVideo!
@IBOutlet weak var initialLabel: UILabel!
@IBOutlet weak var statementLabel: UILabel!
var mp3: [String] = ["turk_milleti_demokrattir","xyz"]
var fav: [String] = ["0","0"]
var name: [String] = ["Türk milleti demokrattır","xy"]
var toggleState = 1
@IBOutlet weak var playB: UIButton!
var counter = 0
var duration = 0.1
override func viewDidLoad() {
super.viewDidLoad()
player?.delegate = self
playB.setImage(UIImage(named: "playbtn.png"), for: .normal)
statementLabel.text = name[counter]
backgroundVideo.createBackgroundVideo(name: "abc", type: "mp4")
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
@IBAction func likeButton(_ sender: Any) {
fav[counter] = "1"
print(fav[0...1])
}
@IBAction func playButton(_ sender: Any) {
let name = mp3[counter]
playSound(name: name)
let playBtn = sender as! UIButton
if toggleState == 1 {
player?.play()
toggleState = 2
playBtn.setImage(UIImage(named: "pausebtn.png"), for: .normal)
} else {
player?.pause()
toggleState = 1
playBtn.setImage(UIImage(named:"playbtn.png"),for: .normal)
}
}
@IBAction func nextButton(_ sender: Any) {
counter = counter + 1
if counter == mp3.count {
counter = 0
}
toggleState = 2
playB.setImage(UIImage(named: "pausebtn.png"), for: .normal)
playSound(name: mp3[counter])
statementLabel.text = name[counter]
}
func playSound(name: String ) {
guard let url = Bundle.main.url(forResource: name, withExtension: "mp3") else {
print("url not found")
return
}
do {
/// this codes for making this app ready to takeover the device audio
try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
try AVAudioSession.sharedInstance().setActive(true)
/// change fileTypeHint according to the type of your audio file (you can omit this)
player = try AVAudioPlayer(contentsOf: url, fileTypeHint: AVFileTypeMPEGLayer3)
// no need for prepareToPlay because prepareToPlay is happen automatically when calling play()
player!.play()
} catch let error as NSError {
print("error: \(error.localizedDescription)")
}
}
func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
print("finished")//It is not working, not printing "finished"
}
}
答案 0 :(得分:2)
我在Leo Dabus的帮助下解决了我的问题。
我改变了我编辑的代码。我搬了player?.delegate = self
到playSound
func。最后,它正在发挥作用。
playSound& audioPlayerDidFinishPlaying功能:
func playSound(name: String ) {
guard let url = Bundle.main.url(forResource: name, withExtension: "mp3") else {
print("url not found")
return
}
do {
/// this codes for making this app ready to takeover the device audio
try AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayback)
try AVAudioSession.sharedInstance().setActive(true)
/// change fileTypeHint according to the type of your audio file (you can omit this)
player = try AVAudioPlayer(contentsOf: url, fileTypeHint: AVFileTypeMPEGLayer3)
player?.delegate = self
// no need for prepareToPlay because prepareToPlay is happen automatically when calling play()
player!.play()
} catch let error as NSError {
print("error: \(error.localizedDescription)")
}
}
func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
print("finished")//It is working now! printed "finished"!
}
不要忘记将AVAudioPlayerDelegate
添加到ViewController!
class ViewController: UIViewController,AVAudioPlayerDelegate {
答案 1 :(得分:2)
您没有正确设置播放器的代理。
在viewDidLoad中,你的播放器将是零,所以这一行:
player?.delegate = self
什么都不做(问号是可选的链接,所以如果玩家== nil,它什么都不做。)
您需要在加载播放器后设置委托。