- html - 出于某种原因,IE8 对我的 Sass 文件中继承的 html5 CSS 不友好?
- JMeter 在响应断言中使用 span 标签的问题
- html - 在 :hover and :active? 上具有不同效果的 CSS 动画
- html - 相对于居中的 html 内容固定的 CSS 重复背景?
当我尝试在 AudioKit 播放器之间切换时,我遇到了不同类型的问题。我将添加代码,但我会尝试简化它。
比方说,我有五个玩家和一个用于这些玩家的录音机,我为玩家 1 录制一次,为玩家 2 录制一次,如果我尝试在它们之间交换,则交换会成功。如果我记录player1两次和player2两次,交换会成功,但是如果我记录player1两次和player2一次,在交换期间它会说player1不存在(nil) - fatal error :隐式时意外发现nil解包可选值。
另一个问题:我已经记录了player1两次,player2两次,player3和player4一次,我试图在player3和player4之间交换,但它说player3或player4不存在(nil) - fatal error :意外在隐式解包可选值时发现 nil。只有player1和player2录制一次,或者player3和player4录制两次才成功。
最后一个问题:我已经录制了一次player1,一次player2,我想将player1与空的player3交换,成功了。当我尝试在player2和player1之间交换(现在应该是空的)时,它说player1不存在(nil) - fatal error :在隐式解包可选值时意外发现nil,现在应该将player1 与player2 上的录音交换。
帮我找出为什么如此令人沮丧。这是代码:
@objc func startStopClipRecording1(button: UIButton, event: UIEvent) {
switch self.state {
case .readyToRecord :
if self.recorded1 == true{
while multiPlayers.contains(player1) {
if let itemToRemoveIndex = multiPlayers.firstIndex(of: player1) {
multiPlayers.remove(at: itemToRemoveIndex)
}
}
}
self.plot?.node = self.mic
self.state = .recording
_ = AVAudioTime(hostTime: UInt64(event.timestamp * secondsToTicks))
guard let lastRenderHostTime = mainMixer.avAudioNode.lastRenderTime?.hostTime else { fatalError("Engine not running!") }
let audioSession = AKSettings.session
let bufferDurationTicks = UInt64(audioSession.ioBufferDuration * secondsToTicks)
let outputLatencyTicks = UInt64(audioSession.outputLatency * secondsToTicks)
let inputLatencyTicks = UInt64(audioSession.inputLatency * secondsToTicks)
let nextRenderHostTime = lastRenderHostTime + bufferDurationTicks
let renderAfterNextHostTime = nextRenderHostTime + bufferDurationTicks
let startTimeHost = renderAfterNextHostTime + outputLatencyTicks
let playbackStartTime = AVAudioTime(hostTime: startTimeHost - outputLatencyTicks)
let recordingStartTime = AVAudioTime(hostTime: startTimeHost + inputLatencyTicks)
metronome.beatTime = 0
directRecorder?.currentTime = 0
var bars = 30 / (4 * (60 / metronome.tempo))
bars.round(.towardZero)
let durationClipRec = bars * (4 * (60 / metronome.tempo))
try? directRecorder?.recordClip(time: 0, duration: durationClipRec, tap: nil) { result in
switch result {
case .error(let error):
AKLog(error)
return
case .clip(let clip):
AKLog("direct.duration \(clip.duration)")
AKLog("direct.StartTime \(clip.startTime)")
do {
let urlInDocs = FileManager.docs.appendingPathComponent(self.filename1).appendingPathExtension(clip.url.pathExtension)
if FileManager.default.fileExists(atPath: urlInDocs.path){
FileManager.emtpyDocumentsDirectory()
}
try FileManager.default.moveItem(at: clip.url, to: urlInDocs)
self.url1 = urlInDocs
self.clip1 = clip
AKLog("Direct saved at " + urlInDocs.path)
} catch {
AKLog(error)
}
}
}
let todoDelay = 0.001
if self.recordedButNot1 == true{
multiPlayers.forEach { player in
player.play(at: playbackStartTime) }
metronome.play(at: recordingStartTime + todoDelay)
directRecorder?.start(at: recordingStartTime)
recTimer1 = Timer.scheduledTimer(timeInterval: 30.2, target:self, selector:#selector(recAction1), userInfo:nil, repeats:false)
}else{
metronome.play(at: recordingStartTime + todoDelay)
directRecorder?.start(at: recordingStartTime)
recTimer1 = Timer.scheduledTimer(timeInterval: 30.2, target:self, selector:#selector(recAction1), userInfo:nil, repeats:false)
}
case .recording :
directRecorder?.stopRecording()
directRecorder?.stop()
recordAction1()
}
}
@objc func recAction1(){
recordAction1()
}
func recordAction1(){
self.addPlayer1(withFileURL: url1)
self.instButton1.isHidden = false
swapMButton.isUserInteractionEnabled = true
self.plot?.node = nil
self.recorded1 = true
self.firstRecordDuration = true
self.recordedButNot2 = true
self.recordedButNot3 = true
self.recordedButNot4 = true
self.recordedButNot5 = true
self.metronome.stop()
self.setupUIForPlaying()
self.setupUIForRecording1()
recTimer1.invalidate()
}
private func addPlayer1(withFileURL url: URL) {
player1 = AKPlayer(url: url)
player1.buffering = .always
player1.prepare()
player1.pan = 0
self.multiPlayers.append(self.player1)
self.mainMixer.connect(input: self.player1)
}
func swap(_ str1: inout URL, _ str2: inout URL) {
(str1, str2) = (str2, str1)
}
func swapPlayers(AKplayer: AKPlayer, urlString: URL, timeLabel1: UITextField, timeLabel2: UITextField,
textField1: UITextField, textField2: UITextField, playerName1: String, playerName2: String,
instrument1: InstrumentButton, instrument2: InstrumentButton, isPlayer2Recorded: Bool, button1:
UIImageView, button2: UIImageView, maskLayer: CAShapeLayer, view: UIView){
while self.multiPlayers.contains(AKplayer) {
if let itemToRemoveIndex = self.multiPlayers.firstIndex(of: AKplayer) {
self.multiPlayers.remove(at: itemToRemoveIndex)
}
}
if playerName1 == self.recordingName1{
fileName = filename1
clip6 = clip1
}
if playerName1 == self.recordingName2{
fileName = filename2
clip6 = clip2
}
if playerName1 == self.recordingName3{
fileName = filename3
clip6 = clip3
}
if playerName1 == self.recordingName4{
fileName = filename4
clip6 = clip4
}
if playerName1 == self.recordingName5{
fileName = filename5
clip6 = clip5
}
let myLayer = plot!.waveformLayer!
myLayer.path = maskLayer.path
view.layer.addSublayer(myLayer)
self.plot?.clear()
instTextField6.text = textField1.text
recordingTimeLabel6.text = timeLabel1.text
if isPlayer2Recorded == true{
if playerName2 == self.recordingName1{
AKplayer2 = player1
}
if playerName2 == self.recordingName2{
AKplayer2 = player2
}
if playerName2 == self.recordingName3{
AKplayer2 = player3
}
if playerName2 == self.recordingName4{
AKplayer2 = player4
}
if playerName2 == self.recordingName5{
AKplayer2 = player5
}
textField1.text = textField2.text
textField2.text = instTextField6.text
selectedInstrumentToImage(button: instrument1, textField: textField1)
selectedInstrumentToImage(button: instrument2, textField: textField2)
timeLabel1.text = timeLabel2.text
timeLabel2.text = recordingTimeLabel6.text
while self.multiPlayers.contains(AKplayer2) {
if let itemToRemoveIndex = self.multiPlayers.firstIndex(of: AKplayer2) {
self.multiPlayers.remove(at: itemToRemoveIndex)
}
}
if playerName1 == self.recordingName1{
if playerName2 == self.recordingName2{
print(url1!)
print(url2!)
swap(&url1, &url2)
print(url1!)
print(url2!)
addPlayer1(withFileURL: url1)
addPlayer2(withFileURL: url2)
}
if playerName2 == self.recordingName3{
self.url1 = self.url3
self.url3 = self.url6
addPlayer1(withFileURL: url1)
addPlayer3(withFileURL: url3)
}
if playerName2 == self.recordingName4{
self.url1 = self.url4
self.url4 = self.url6
addPlayer1(withFileURL: url1)
addPlayer4(withFileURL: url4)
}
if playerName2 == self.recordingName5{
self.url1 = self.url5
self.url5 = self.url6
addPlayer1(withFileURL: url1)
addPlayer5(withFileURL: url5)
}
}
if playerName1 == self.recordingName2{
if playerName2 == self.recordingName1{
self.url2 = self.url1
self.url1 = self.url6
addPlayer2(withFileURL: url2)
addPlayer1(withFileURL: url1)
}
if playerName2 == self.recordingName3{
self.url2 = self.url3
self.url3 = self.url6
addPlayer2(withFileURL: url2)
addPlayer3(withFileURL: url3)
}
if playerName2 == self.recordingName4{
self.url2 = self.url4
self.url4 = self.url6
addPlayer2(withFileURL: url2)
addPlayer4(withFileURL: url4)
}
if playerName2 == self.recordingName5{
self.url2 = self.url5
self.url5 = self.url6
addPlayer2(withFileURL: url2)
addPlayer5(withFileURL: url5)
}
}
if playerName1 == self.recordingName3{
if playerName2 == self.recordingName1{
self.url3 = self.url1
self.url1 = self.url6
addPlayer3(withFileURL: url3)
addPlayer1(withFileURL: url1)
}
if playerName2 == self.recordingName2{
self.url3 = self.url2
self.url2 = self.url6
addPlayer3(withFileURL: url3)
addPlayer2(withFileURL: url2)
}
if playerName2 == self.recordingName4{
self.url3 = self.url4
self.url4 = self.url6
addPlayer3(withFileURL: url3)
addPlayer4(withFileURL: url4)
}
if playerName2 == self.recordingName5{
self.url3 = self.url5
self.url5 = self.url6
addPlayer3(withFileURL: url3)
addPlayer5(withFileURL: url5)
}
}
if playerName1 == self.recordingName4{
if playerName2 == self.recordingName1{
self.url4 = self.url1
self.url1 = self.url6
addPlayer4(withFileURL: url4)
addPlayer1(withFileURL: url1)
}
if playerName2 == self.recordingName2{
self.url4 = self.url2
self.url2 = self.url6
addPlayer4(withFileURL: url4)
addPlayer2(withFileURL: url2)
}
if playerName2 == self.recordingName3{
self.url4 = self.url3
self.url3 = self.url6
addPlayer4(withFileURL: url4)
addPlayer3(withFileURL: url3)
}
if playerName2 == self.recordingName5{
self.url4 = self.url5
self.url5 = self.url6
addPlayer4(withFileURL: url4)
addPlayer5(withFileURL: url5)
}
}
if playerName1 == self.recordingName5{
if playerName2 == self.recordingName1{
self.url5 = self.url1
self.url1 = self.url6
addPlayer5(withFileURL: url5)
addPlayer1(withFileURL: url1)
}
if playerName2 == self.recordingName2{
self.url5 = self.url2
self.url2 = self.url6
addPlayer5(withFileURL: url5)
addPlayer2(withFileURL: url2)
}
if playerName2 == self.recordingName3{
self.url5 = self.url3
self.url3 = self.url6
addPlayer5(withFileURL: url5)
addPlayer3(withFileURL: url3)
}
if playerName2 == self.recordingName4{
self.url5 = self.url4
self.url4 = self.url6
addPlayer5(withFileURL: url5)
addPlayer4(withFileURL: url4)
}
}
}else{
button1.isUserInteractionEnabled = false
button2.isUserInteractionEnabled = true
textField1.text = ""
textField2.text = instTextField6.text
selectedInstrumentToImage(button: instrument1, textField: textField1)
selectedInstrumentToImage(button: instrument2, textField: textField2)
timeLabel1.text = timeLabel2.text
timeLabel2.text = recordingTimeLabel6.text
if playerName1 == self.recordingName1{
recorded1 = false
reverb1.outputNode.removeTap(onBus: 0)
delay1.outputNode.removeTap(onBus: 0)
player1.outputNode.removeTap(onBus: 0)
player1 = nil
delaySlider1.isEnabled = false
reverbSlider1.isEnabled = false
volumeSlider1.isEnabled = false
soloButton1.isEnabled = false
muteButton1.isEnabled = false
if playerName2 == self.recordingName2{
self.url1 = nil
self.clip1 = nil
self.url2 = self.url6
addPlayer2(withFileURL: url2)
recorded2 = true
}
if playerName2 == self.recordingName3{
self.url1 = nil
self.clip1 = nil
self.url3 = self.url6
addPlayer3(withFileURL: url3)
recorded3 = true
}
if playerName2 == self.recordingName4{
self.url1 = nil
self.clip1 = nil
self.url4 = self.url6
addPlayer4(withFileURL: url4)
recorded4 = true
}
if playerName2 == self.recordingName5{
self.url1 = nil
self.clip1 = nil
self.url5 = self.url6
addPlayer5(withFileURL: url5)
recorded5 = true
}
}
if playerName1 == self.recordingName2{
recorded2 = false
reverb2.outputNode.removeTap(onBus: 0)
delay2.outputNode.removeTap(onBus: 0)
player2.outputNode.removeTap(onBus: 0)
player2 = nil
delaySlider2.isEnabled = false
reverbSlider2.isEnabled = false
volumeSlider2.isEnabled = false
soloButton2.isEnabled = false
muteButton2.isEnabled = false
if playerName2 == self.recordingName1{
self.url2 = nil
self.clip2 = nil
self.url1 = self.url6
addPlayer1(withFileURL: url1)
recorded1 = true
}
if playerName2 == self.recordingName3{
self.url2 = nil
self.clip2 = nil
self.url3 = self.url6
addPlayer3(withFileURL: url3)
recorded3 = true
}
if playerName2 == self.recordingName4{
self.url2 = nil
self.clip2 = nil
self.url4 = self.url6
addPlayer4(withFileURL: url4)
recorded4 = true
}
if playerName2 == self.recordingName5{
self.url2 = nil
self.clip2 = nil
self.url5 = self.url6
addPlayer5(withFileURL: url5)
recorded5 = true
}
}
if playerName1 == self.recordingName3{
recorded3 = false
reverb3.outputNode.removeTap(onBus: 0)
delay3.outputNode.removeTap(onBus: 0)
player3.outputNode.removeTap(onBus: 0)
player3 = nil
delaySlider3.isEnabled = false
reverbSlider3.isEnabled = false
volumeSlider3.isEnabled = false
soloButton3.isEnabled = false
muteButton3.isEnabled = false
if playerName2 == self.recordingName1{
self.url3 = nil
self.clip3 = nil
self.url1 = self.url6
addPlayer1(withFileURL: url1)
recorded1 = true
}
if playerName2 == self.recordingName2{
self.url3 = nil
self.clip3 = nil
self.url2 = self.url6
addPlayer2(withFileURL: url2)
recorded2 = true
}
if playerName2 == self.recordingName4{
self.url3 = nil
self.clip3 = nil
self.url4 = self.url6
addPlayer4(withFileURL: url4)
recorded4 = true
}
if playerName2 == self.recordingName5{
self.url3 = nil
self.clip3 = nil
self.url5 = self.url6
addPlayer5(withFileURL: url5)
recorded5 = true
}
}
if playerName1 == self.recordingName4{
recorded4 = false
reverb4.outputNode.removeTap(onBus: 0)
delay4.outputNode.removeTap(onBus: 0)
player4.outputNode.removeTap(onBus: 0)
player4 = nil
delaySlider4.isEnabled = false
reverbSlider4.isEnabled = false
volumeSlider4.isEnabled = false
soloButton4.isEnabled = false
muteButton4.isEnabled = false
if playerName2 == self.recordingName1{
self.url4 = nil
self.clip4 = nil
self.url1 = self.url6
addPlayer1(withFileURL: url1)
recorded1 = true
}
if playerName2 == self.recordingName2{
self.url4 = nil
self.clip4 = nil
self.url2 = self.url6
addPlayer2(withFileURL: url2)
recorded2 = true
}
if playerName2 == self.recordingName3{
self.url4 = nil
self.clip4 = nil
self.url3 = self.url6
addPlayer3(withFileURL: url3)
recorded3 = true
}
if playerName2 == self.recordingName5{
self.url4 = nil
self.clip4 = nil
self.url5 = self.url6
addPlayer5(withFileURL: url5)
recorded5 = true
}
}
if playerName1 == self.recordingName5{
recorded5 = false
reverb5.outputNode.removeTap(onBus: 0)
delay5.outputNode.removeTap(onBus: 0)
player5.outputNode.removeTap(onBus: 0)
player5 = nil
delaySlider5.isEnabled = false
reverbSlider5.isEnabled = false
volumeSlider5.isEnabled = false
soloButton5.isEnabled = false
muteButton5.isEnabled = false
if playerName2 == self.recordingName1{
self.url5 = nil
self.clip5 = nil
self.url1 = self.url6
addPlayer1(withFileURL: url1)
recorded1 = true
}
if playerName2 == self.recordingName2{
self.url5 = nil
self.clip5 = nil
self.url2 = self.url6
addPlayer2(withFileURL: url2)
recorded2 = true
}
if playerName2 == self.recordingName3{
self.url5 = nil
self.clip5 = nil
self.url3 = self.url6
addPlayer3(withFileURL: url3)
recorded3 = true
}
if playerName2 == self.recordingName4{
self.url5 = nil
self.clip5 = nil
self.url4 = self.url6
addPlayer4(withFileURL: url4)
recorded4 = true
}
}
let urlInDocs = FileManager.docs.appendingPathComponent(self.fileName!).appendingPathExtension(clip6!.url.pathExtension)
if FileManager.default.fileExists(atPath: urlInDocs.path){
FileManager.emtpyDocumentsDirectory()
}
}
}
最佳答案
我找到了解决方案:
而不是:
FileManager.emtpyDocumentsDirectory()
在 startStopClipRecording 函数中,我发现它会删除所有文件,我必须为 URL 执行特定的代码:
if FileManager.default.fileExists(atPath: urlInDocs.path){
do {
try FileManager.default.removeItem(at: urlInDocs)
print("File deleted", urlInDocs)
} catch let error as NSError {
print("Error: \(error.domain)")
}
}
关于swift - 当我尝试在 AudioKit 播放器之间切换时遇到问题,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/58674132/
有没有办法在 .swift 文件(编译成 .swift 模块)中声明函数,如下所示: 你好.swift func hello_world() { println("hello world")
我正在尝试使用 xmpp_messenger_ios 和 XMPPFramework 在 iOS 上执行 MUC 这是加入房间的代码。 func createOrJoinRoomOnXMPP()
我想在我的应用程序上创建一个 3D Touch 快捷方式,我已经完成了有关快捷方式本身的所有操作,它显示正确,带有文本和图标。 当我运行这个快捷方式时,我的应用程序崩溃了,因为 AppDelegate
我的代码如下: let assetTag = Expression("asset_tag") let query2 = mdm.select(mdm[assetTag],os, mac, lastRe
我的 swift 代码如下所示 Family.arrayTuple:[(String,String)]? = [] Family.arrayTupleStorage:String? Family.ar
这是我的 JSON,当我读取 ord 和 uniq 数据时出现错误 let response2 : [String: Any] = ["Response":["status":"SUCCESS","
我想将 swift 扩展文件移动到 swift 包中。但是,将文件移动到 swift 包后,我遇到了这种错误: "Type 'NSAttributedString' has no member 'ma
使用CocoaPods,我们可以设置以下配置: pod 'SourceModel', :configurations => ['Debug'] 有什么方法可以用 Swift Package Manag
我正在 Xcode 中开发一个 swift 项目。我将其称为主要项目。我大部分都在工作。我在日期选择器、日期范围和日期数学方面遇到了麻烦,因此我开始了另一个名为 StarEndDate 的项目,其中只
这是 ObjectiveC 代码: CCSprite *progress = [CCSprite spriteWithImageNamed:@"progress.png"]; mProgressBar
我正在创建一个命令行工具,在 Xcode 中使用 Swift。我想使用一个类似于 grunt 的配置文件确实如此,但我希望它是像 Swift 包管理器的 package.swift 文件那样的快速代码
我假设这意味着使用系统上安装的任何 swift 运行脚本:#!/usr/bin/swift 如何指定脚本适用的解释器版本? 最佳答案 Cato可用于此: #!/usr/bin/env cato 1.2
代码说完全没问题,没有错误,但是当我去运行模拟器的时候,会出现这样的字样: (Swift.LazyMapCollection (_base:[ ] 我正在尝试创建一个显示报价的报价应用。 这是导入
是否可以在运行 Swift(例如 Perfect、Vapor、Kitura 等)的服务器上使用 RealmSwift 并使用它来存储数据? (我正在考虑尝试将其作为另一种解决方案的替代方案,例如 no
我刚开始学习编程,正在尝试完成 Swift 编程书中的实验。 它要求““编写一个函数,通过比较两个 Rank 值的原始值来比较它们。” enum Rank: Int { case Ace = 1 ca
在您将此问题标记为重复之前,我检查了 this question 它对我不起作用。 如何修复这个错误: error: SWIFT_VERSION '5.0' is unsupported, suppo
从 Xcode 9.3 开始,我在我的模型中使用“Swift.ImplicitlyUnwrappedOptional.some”包裹了我的字符串变量 我不知道这是怎么发生的,但它毁了我的应用程序! 我
这个问题在这里已经有了答案: How to include .swift file from other .swift file in an immediate mode? (2 个答案) 关闭 6
我正在使用 Swift Package Manager 创建一个应用程序,我需要知道构建项目的配置,即 Debug 或 Release。我试图避免使用 .xcodeproj 文件。请有人让我知道这是否
有一个带有函数定义的文件bar.swift: func bar() { println("bar") } 以及一个以立即模式运行的脚本foo.swift: #!/usr/bin/xcrun s
我是一名优秀的程序员,十分优秀!