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Мой код размещен ниже, не уверен, что проблема, но ошибки возврата перечислены выше наряду с фатальной ошибки:Тема 1: BAD_EXC_INSTRUCTION (код = EXC_1386_INVOP, субкодовое = 0x0)
unexpectedly found nil while unwrapping an Optional value
Я видел другие ответы на подобные ошибки, но все они связаны с такими вещами, как если бы они были допущены, а это не то место, где происходит моя ошибка, сообщение об ошибке связано с линией вверху, которая гласит: «audioFile = try AVAudioFile(forReading: recordedAudioURL as URl)»
//
// PlaySoundsViewController+Audio.swift
// PitchPerfect
//
// Copyright © 2016 Udacity. All rights reserved.
//
import UIKit
import AVFoundation
extension PlaySoundsViewController: AVAudioPlayerDelegate {
struct Alerts {
static let DismissAlert = "Dismiss"
static let RecordingDisabledTitle = "Recording Disabled"
static let RecordingDisabledMessage = "You've disabled this app from recording your microphone. Check Settings."
static let RecordingFailedTitle = "Recording Failed"
static let RecordingFailedMessage = "Something went wrong with your recording."
static let AudioRecorderError = "Audio Recorder Error"
static let AudioSessionError = "Audio Session Error"
static let AudioRecordingError = "Audio Recording Error"
static let AudioFileError = "Audio File Error"
static let AudioEngineError = "Audio Engine Error"
}
// raw values correspond to sender tags
enum PlayingState { case Playing, NotPlaying }
// MARK: Audio Functions
func setupAudio() {
// initialize (recording) audio file
do {
audioFile = try AVAudioFile(forReading: recordedAudioURL as URL)
} catch {
showAlert(title: Alerts.AudioFileError, message: String(describing: error))
}
print("Audio has been setup")
}
func playSound(rate: Float? = nil, pitch: Float? = nil, echo: Bool = false, reverb: Bool = false) {
// initialize audio engine components
audioEngine = AVAudioEngine()
// node for playing audio
audioPlayerNode = AVAudioPlayerNode()
audioEngine.attach(audioPlayerNode)
// node for adjusting rate/pitch
let changeRatePitchNode = AVAudioUnitTimePitch()
if let pitch = pitch {
changeRatePitchNode.pitch = pitch
}
if let rate = rate {
changeRatePitchNode.rate = rate
}
audioEngine.attach(changeRatePitchNode)
// node for echo
let echoNode = AVAudioUnitDistortion()
echoNode.loadFactoryPreset(.multiEcho1)
audioEngine.attach(echoNode)
// node for reverb
let reverbNode = AVAudioUnitReverb()
reverbNode.loadFactoryPreset(.cathedral)
reverbNode.wetDryMix = 50
audioEngine.attach(reverbNode)
// connect nodes
if echo == true && reverb == true {
connectAudioNodes(nodes: audioPlayerNode, changeRatePitchNode, echoNode, reverbNode, audioEngine.outputNode)
} else if echo == true {
connectAudioNodes(nodes: audioPlayerNode, changeRatePitchNode, echoNode, audioEngine.outputNode)
} else if reverb == true {
connectAudioNodes(nodes: audioPlayerNode, changeRatePitchNode, reverbNode, audioEngine.outputNode)
} else {
connectAudioNodes(nodes: audioPlayerNode, changeRatePitchNode, audioEngine.outputNode)
}
// schedule to play and start the engine!
audioPlayerNode.stop()
audioPlayerNode.scheduleFile(audioFile, at: nil) {
var delayInSeconds: Double = 0
if let lastRenderTime = self.audioPlayerNode.lastRenderTime, let playerTime = self.audioPlayerNode.playerTime(forNodeTime: lastRenderTime) {
if let rate = rate {
delayInSeconds = Double(self.audioFile.length - playerTime.sampleTime)/Double(self.audioFile.processingFormat.sampleRate)/Double(rate)
} else {
delayInSeconds = Double(self.audioFile.length - playerTime.sampleTime)/Double(self.audioFile.processingFormat.sampleRate)
}
}
// schedule a stop timer for when audio finishes playing
self.stopTimer = Timer(timeInterval: delayInSeconds, target: self, selector: #selector(PlaySoundsViewController.stopAudio), userInfo: nil, repeats: false)
RunLoop.main.add(self.stopTimer!, forMode: RunLoopMode.defaultRunLoopMode)
}
do {
try audioEngine.start()
} catch {
showAlert(title: Alerts.AudioEngineError, message: String(describing: error))
return
}
// play the recording!
audioPlayerNode.play()
}
// MARK: Connect List of Audio Nodes
func connectAudioNodes(nodes: AVAudioNode...) {
for x in 0..<nodes.count-1 {
audioEngine.connect(nodes[x], to: nodes[x+1], format: audioFile.processingFormat)
}
}
func stopAudio() {
if let stopTimer = stopTimer {
stopTimer.invalidate()
}
configureUI(playState: .NotPlaying)
if let audioPlayerNode = audioPlayerNode {
audioPlayerNode.stop()
}
if let audioEngine = audioEngine {
audioEngine.stop()
audioEngine.reset()
}
}
// MARK: UI Functions
func configureUI(playState: PlayingState) {
switch(playState) {
case .Playing:
setPlayButtonsEnabled(enabled: false)
stopplaybackButton.isEnabled = true
case .NotPlaying:
setPlayButtonsEnabled(enabled: true)
stopplaybackButton.isEnabled = false
}
}
func setPlayButtonsEnabled(enabled: Bool) {
snailButton.isEnabled = enabled
chipmunkButton.isEnabled = enabled
rabbitButton.isEnabled = enabled
vaderButton.isEnabled = enabled
echoButton.isEnabled = enabled
reverbButton.isEnabled = enabled
}
func showAlert(title: String, message: String) {
let alert = UIAlertController(title: title, message: message, preferredStyle: .alert)
alert.addAction(UIAlertAction(title: Alerts.DismissAlert, style: .default, handler: nil))
self.present(alert, animated: true, completion: nil)
}
}
Где произносится 'recordAudioURL'? Где он установлен? Каково его значение на линии, вызывающей крушение? – rmaddy
В будущем полезно опубликовать только код _relevant_, который, по вашему мнению, вызывает вашу ошибку, а не сбрасывает код в вопрос. – Aaron