我是一个非常敏捷的初学者，并且正在从事一个教程项目(魔术8球)，并且成功完成了以下工作:
-按下“询问”按钮时播放特定的声音。
-为每个随机选取的图像播放特定的声音
但是，现在每按一次该按钮应播放的声音只播放一次，从那以后我只听到每个图像显示的声音。这是因为我“陷入”了“if- else”循环吗？还是我必须延迟阵列中每个图像的播放声音？
非常感谢你的帮助 !
这是我的代码:
import UIKit
import AVFoundation
class ViewController: UIViewController {
@IBOutlet weak var magicBall: UIImageView!
var magicBallDisplay = 1
var audioPlayer = AVAudioPlayer()
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
magicBall.image = #imageLiteral(resourceName: "theanswerisyes")
}
@IBAction func askButtonPressed(_ sender: UIButton) {
let magicBallArray = [ #imageLiteral(resourceName: "askagainlater"),#imageLiteral(resourceName: "no"),#imageLiteral(resourceName: "theanswerisyes"),#imageLiteral(resourceName: "yes"),#imageLiteral(resourceName: "noidea")]
magicBall.image = magicBallArray.randomElement()
let soundURL = NSURL(fileURLWithPath: Bundle.main.path(forResource: "Ask", ofType: "wav")!)
do{
audioPlayer = try AVAudioPlayer(contentsOf: soundURL as URL)
}catch {
print("there was some error. The error was \(error)")
}
audioPlayer.play()
if (magicBall.image?.isEqual(UIImage(named: "yes")))! {
let soundURL = NSURL(fileURLWithPath: Bundle.main.path(forResource: "yes", ofType: "mp3")!)
do{
audioPlayer = try AVAudioPlayer(contentsOf: soundURL as URL)
} catch {
print("there was some error. The error was \(error)")
}
audioPlayer.play()
}
else if (magicBall.image?.isEqual(UIImage(named: "no")))! {
let soundURL = NSURL(fileURLWithPath: Bundle.main.path(forResource: "no", ofType: "mp3")!)
do{
audioPlayer = try AVAudioPlayer(contentsOf: soundURL as URL)
} catch {
print("there was some error. The error was \(error)")
}
audioPlayer.play()
}
else if (magicBall.image?.isEqual(UIImage(named: "theanswerisyes")))! {
let soundURL = NSURL(fileURLWithPath: Bundle.main.path(forResource: "theanswerisyes", ofType: "mp3")!)
do{
audioPlayer = try AVAudioPlayer(contentsOf: soundURL as URL)
} catch {
print("there was some error. The error was \(error)")
}
audioPlayer.play()
}
else if (magicBall.image?.isEqual(UIImage(named: "noidea")))! {
let soundURL = NSURL(fileURLWithPath: Bundle.main.path(forResource: "noidea", ofType: "mp3")!)
do{
audioPlayer = try AVAudioPlayer(contentsOf: soundURL as URL)
} catch {
print("there was some error. The error was \(error)")
}
audioPlayer.play()
}
else if (magicBall.image?.isEqual(UIImage(named: "askagainlater")))! {
let soundURL = NSURL(fileURLWithPath: Bundle.main.path(forResource: "askagainlater", ofType: "mp3")!)
do{
audioPlayer = try AVAudioPlayer(contentsOf: soundURL as URL)
} catch {
print("there was some error. The error was \(error)")
}
audioPlayer.play()
}
}
}
最佳答案
我创建一个新项目，并将您的代码更改为此:
import UIKit
import AVFoundation
class ViewController: UIViewController {
@IBOutlet weak var magicBall: UIImageView!
// you never used this
//var magicBallDisplay = 1
var audioPlayer = AVAudioPlayer()
override func viewDidLoad() {
super.viewDidLoad()
magicBall.image = #imageLiteral(resourceName: "theanswerisyes")
}
@IBAction func askButtonPressed(_ sender: UIButton) {
// because you have audio file and image with equal name i made array of string
let magicBallArray = [ "yes","no","theanswerisyes","noidea","askagainlater"]
// check if i get not null item
guard let choosedImageName = magicBallArray.randomElement() else {return}
print(choosedImageName)
// set image with random picked name
magicBall.image = UIImage(named: choosedImageName)
// play ask sound
playSound(fileName: "Ask", fileType: "wav")
// play picked image sound after 10 second from now()
// change number to your needed time
DispatchQueue.main.asyncAfter(deadline: .now() + 10.0, execute: {
self.playSound(fileName: choosedImageName, fileType: "mp3")
})
}
private func playSound(fileName: String, fileType: String)
{
// check if you find the audio file
guard let url = Bundle.main.path(forResource: fileName, ofType: fileType) else {
print("path not found")
return
}
// make NSURL from path
let soundURL = NSURL(fileURLWithPath: url)
do{
audioPlayer = try AVAudioPlayer(contentsOf: soundURL as URL)
} catch {
print("there was some error. The error was \(error)")
}
audioPlayer.play()
}
}
我为您解释代码。
我没有启用该按钮。当您变得更强大时，可以改进此代码
关于ios - 如何为快速播放的声音增加延迟，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/59704751/