AVAudioPlayer Swift 3无法播放声音 [英] AVAudioPlayer Swift 3 not playing sound
本文介绍了AVAudioPlayer Swift 3无法播放声音的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我将AVFoundation.framework添加到了我的项目中.在我的项目导航器中,添加了文件"Horn.mp3",声音为1秒.
I added the AVFoundation.framework to my project. In my project navigator I added the file "Horn.mp3", this is a sound of 1 second.
按下按钮(带有喇叭声)时,声音应该播放,标签也应该更改其文本.
When a button is pressed (with a image of a horn) the sound should play, also should a label change it's text.
标签正在更改其文本,但声音没有播放.
The label is changing it's text, but the sound isn't playing.
这是我的代码:
import UIKit
import AVFoundation
class ViewController: UIViewController {
@IBAction func hornButtonPressed(_ sender: Any) {
playSound()
hornLabel.text = "Toet!!!"
}
@IBOutlet weak var hornLabel: UILabel!
func playSound(){
var player: AVAudioPlayer?
let sound = Bundle.main.url(forResource: "Horn", withExtension: "mp3")
do {
player = try AVAudioPlayer(contentsOf: sound!)
guard let player = player else { return }
player.prepareToPlay()
player.play()
} catch let error {
print(error.localizedDescription)
}
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
推荐答案
您需要将 AVPlayer
的声明移到类级别.在方法中声明 AVPlayer
时无法播放声音.
You need to move the AVPlayer
's declaration to class-level. AVPlayer
can't play sounds when you declare them in methods.
class ViewController: UIViewController {
var player: AVAudioPlayer? // <-- notice here
@IBAction func hornButtonPressed(_ sender: Any) {
playSound()
hornLabel.text = "Toet!!!"
}
@IBOutlet weak var hornLabel: UILabel!
func playSound(){
let sound = Bundle.main.url(forResource: "Horn", withExtension: "mp3")
do {
player = try AVAudioPlayer(contentsOf: sound!)
guard let player = player else { return }
player.prepareToPlay()
player.play()
} catch let error {
print(error.localizedDescription)
}
}
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
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