Question

这里是一个操场，可以测试一些音频编程。我创建了一个包含运动场文件的文件夹，并插入了Bowie.mp3，它在代码中以其名称进行了引用。但是，我收到一条错误消息，说在捆绑包中找不到音频文件。我猜您是在操场上处理支持文件的方式，而不是Xode IDE。

将mp3文件放在哪里或如何附加？（请在下面输入完整代码） THX

import UIKit

import AVFoundation
import UIKit
import PlaygroundSupport

// create instance of AudiofileURL and check for existence
guard let myAudioFileURL = Bundle.main.url(forResource: "Bowie", withExtension: "mp3") else {
    fatalError("Audiofile not in Bundle")
} //end of guard let else

// create audioFile instance and check for existence
var myAudioFile: AVAudioFile?
do{
    myAudioFile = try AVAudioFile(forReading: myAudioFileURL)
} catch {
    fatalError("cannot create AVAudioFile \(error)")
} //end of do catch AudioFile check


// II Preparing Audio settings
// II.1 Creating more instances to let audioFile work on: a AVAudioNode instance is assigned to AVAudioEngine instance

let myEngine = AVAudioEngine()
let myPlayerNode = AVAudioPlayerNode()


// II.2. AudioEngine start // Why necessary?
myEngine.attach(myPlayerNode)

//II.3 assigning audioFile to the audioEngine/audioNode complex...(-> Feels like lot of effort for playing a mp3. Where are the pros and cons?
// Setting some variables for the initialisation

let myFramePosition: AVAudioFramePosition = 2000
let myFrameCount: AVAudioFrameCount = 5000

// II.4 scheduling playerNode instance. But Why?
myPlayerNode.scheduleFile(myAudioFile!, at: nil){
myPlayerNode.play()
}

找不到Xcode10游乐场音频文件

0 个答案: