AVAudioPlayer 使用数组对音频文件进行排队 - Swift
AVAudioPlayer using array to queue audio files - Swift
我正在寻找一种简单地逐个播放音频文件的方法。
使用数组的 AVAudioPlayer 似乎是最好的解决方案。事实上,我能够使用此页面上发现的 Sneak 的建议来播放数组的第一个元素:.
但我不明白在哪里以及如何编写对 AVAudioPlayer 的第二次调用以播放第二个文件?
"audioPlayerDidFinishPlaying" 函数没有反应。为什么?
感谢收看
import Cocoa
import AVFoundation
var action = AVAudioPlayer()
let path = Bundle.main.path(forResource: "test.aif", ofType:nil)!
let url = URL(fileURLWithPath: path)
let path2 = Bundle.main.path(forResource: "test2.aif", ofType:nil)!
let url2 = URL(fileURLWithPath: path2)
let array1 = NSMutableArray(array: [url, url2])
class ViewController: NSViewController
{
@IBOutlet weak var LanceStop: NSButton!
override func viewDidLoad()
{
super.viewDidLoad()
do
{
action = try AVAudioPlayer(contentsOf: array1[0] as! URL)
action.numberOfLoops = 0
action.prepareToPlay()
action.volume = 1
}catch{print("error")}
}
...
@IBAction func Lancer(_ sender: NSButton)
{
if action.isPlaying == true
{
action.stop()
action.currentTime = 0.0
LanceStop.title = "Lancer"
}
else
{
action.play()
LanceStop.title = "Stopper"
}
}
func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool)
{
if flag == true
{
LanceStop.title = "Lancer"
}
}
}
But I don't understand where and how to write the second call to
AVAudioPlayer in order to play the second file?
因此,为了播放第二个文件,您需要编写一个方法来初始化音频播放器,并在音频播放器委托方法 audioPlayerDidFinishPlaying
中调用相同的方法,如下所示:-
func playAudioFile(_ index: Int) {
do
{
action = try AVAudioPlayer(contentsOf: array1[index] as! URL)
action.numberOfLoops = 0
action.prepareToPlay()
action.volume = 1
} catch{print("error")
}
func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
//This delegate method will called once it finished playing audio file.
//Here you can invoke your second file. You can declare counter variable
//and increment it based on your file and stop playing your file acordingly.
counter = counter + 1
playAudioFile(counter)
}
Note:- Set Audioplayer delegate to your ViewController in order to get invoke
audioPlayerDidFinishPlaying method like this.
action.delegate = self
更改代码...
class ViewController: NSViewController, AVAudioPlayerDelegate
{
@IBOutlet weak var LanceStop: NSButton!
override func viewDidLoad()
{
super.viewDidLoad()
}
override var representedObject: Any?
{
didSet
{
// Update the view, if already loaded.
}
}
func playAudioFile(_ index: Int)
{
do
{
action = try AVAudioPlayer(contentsOf: array1[index] as! URL)
action.delegate = self
action.numberOfLoops = 0
action.prepareToPlay()
action.volume = 1
action.play()
}
catch{print("error")}
}
@IBAction func Lancer(_ sender: NSButton)
{
playAudioFile(0)
}
func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool)
{
if flag == true
{
playAudioFile(1)
}
}
}
我正在寻找一种简单地逐个播放音频文件的方法。
使用数组的 AVAudioPlayer 似乎是最好的解决方案。事实上,我能够使用此页面上发现的 Sneak 的建议来播放数组的第一个元素:
但我不明白在哪里以及如何编写对 AVAudioPlayer 的第二次调用以播放第二个文件?
"audioPlayerDidFinishPlaying" 函数没有反应。为什么?
感谢收看
import Cocoa
import AVFoundation
var action = AVAudioPlayer()
let path = Bundle.main.path(forResource: "test.aif", ofType:nil)!
let url = URL(fileURLWithPath: path)
let path2 = Bundle.main.path(forResource: "test2.aif", ofType:nil)!
let url2 = URL(fileURLWithPath: path2)
let array1 = NSMutableArray(array: [url, url2])
class ViewController: NSViewController
{
@IBOutlet weak var LanceStop: NSButton!
override func viewDidLoad()
{
super.viewDidLoad()
do
{
action = try AVAudioPlayer(contentsOf: array1[0] as! URL)
action.numberOfLoops = 0
action.prepareToPlay()
action.volume = 1
}catch{print("error")}
}
...
@IBAction func Lancer(_ sender: NSButton)
{
if action.isPlaying == true
{
action.stop()
action.currentTime = 0.0
LanceStop.title = "Lancer"
}
else
{
action.play()
LanceStop.title = "Stopper"
}
}
func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool)
{
if flag == true
{
LanceStop.title = "Lancer"
}
}
}
But I don't understand where and how to write the second call to
AVAudioPlayer in order to play the second file?
因此,为了播放第二个文件,您需要编写一个方法来初始化音频播放器,并在音频播放器委托方法 audioPlayerDidFinishPlaying
中调用相同的方法,如下所示:-
func playAudioFile(_ index: Int) {
do
{
action = try AVAudioPlayer(contentsOf: array1[index] as! URL)
action.numberOfLoops = 0
action.prepareToPlay()
action.volume = 1
} catch{print("error")
}
func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool) {
//This delegate method will called once it finished playing audio file.
//Here you can invoke your second file. You can declare counter variable
//and increment it based on your file and stop playing your file acordingly.
counter = counter + 1
playAudioFile(counter)
}
Note:- Set Audioplayer delegate to your ViewController in order to get invoke audioPlayerDidFinishPlaying method like this.
action.delegate = self
更改代码...
class ViewController: NSViewController, AVAudioPlayerDelegate
{
@IBOutlet weak var LanceStop: NSButton!
override func viewDidLoad()
{
super.viewDidLoad()
}
override var representedObject: Any?
{
didSet
{
// Update the view, if already loaded.
}
}
func playAudioFile(_ index: Int)
{
do
{
action = try AVAudioPlayer(contentsOf: array1[index] as! URL)
action.delegate = self
action.numberOfLoops = 0
action.prepareToPlay()
action.volume = 1
action.play()
}
catch{print("error")}
}
@IBAction func Lancer(_ sender: NSButton)
{
playAudioFile(0)
}
func audioPlayerDidFinishPlaying(_ player: AVAudioPlayer, successfully flag: Bool)
{
if flag == true
{
playAudioFile(1)
}
}
}