Swift 运行时错误 (exc_bad_access) AVAudioRecorder, recordSettings
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【中文标题】Swift 运行时错误 (exc_bad_access) AVAudioRecorder, recordSettings【英文标题】:Swift runtime error (exc_bad_access) AVAudioRecorder, recordSettings 【发布时间】:2015-10-19 17:29:09 【问题描述】:我一直在努力将一段用于录制音频的代码从 swift 1.2 更改为 swift 2。在这里的人们的帮助下,我做了一些更改,最终摆脱了所有编译器错误。但是现在,在我运行代码后,登录 Twitter,然后单击模拟器中的 Record 按钮,它崩溃并给我一个运行时错误。请看这里的图片:
另外,我不确定这是否重要,但我从代码中删除了“AVFormatIDKey : NSNumber(int: Int32(kAudioFormatAppleLossless))”并注释掉了“self.audioRecorder.meteringEnabled = true”和“ self.audioRecorder.prepareToRecord()" 从代码中,它不再崩溃,但显然这不是代码应该在最后运行的方式......
这是完整版的代码。对此有什么想法吗?
非常感谢您的帮助
import UIKit
import AVFoundation
class RecordViewController: UIViewController
required init?(coder aDecoder: NSCoder)
var baseString : String = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)[0] as String
self.audioURL = "sound.m4a"
var pathComponents = [baseString, self.audioURL]
var audioNSURL = NSURL.fileURLWithPathComponents(pathComponents)
var session = AVAudiosession.sharedInstance()
do
try session.setCategory(AVAudioSessionCategoryPlayAndRecord)
catch (_)
// session.setCategory(AVAudioSessionCategoryPlayAndRecord, error: nil)
// var recordSettings: [String : AnyObject] = Dictionary()
// recordSettings[AVFormatIDKey] = kAudioFormatMPEG4AAC
// recordSettings[AVFormatIDKey] = NSNumber(unsignedInt: kAudioFormatMPEG4AAC)
// recordSettings[AVSampleRateKey] = 44100.0
// recordSettings[AVNumberOfChannelsKey] = 2
let recordSettings = [
AVSampleRateKey : NSNumber(float: Float(44100.0)),
AVFormatIDKey : NSNumber(int: Int32(kAudioFormatAppleLossless)),
AVNumberOfChannelsKey : NSNumber(int: 1),
AVEncoderAudioQualityKey : NSNumber(int: Int32(AVAudioQuality.Medium.rawValue)),
AVEncoderBitRateKey : NSNumber(int: Int32(320000))
]
// self.audioRecorder = AVAudioRecorder(URL: audioNSURL, settings: recordSettings, error: nil)
self.audioRecorder = AVAudioRecorder()
print("aaaaa")
do
self.audioRecorder = try AVAudioRecorder(URL: audioNSURL!, settings: recordSettings)
catch (_)
self.audioRecorder.meteringEnabled = true
self.audioRecorder.prepareToRecord()
super.init(coder: aDecoder)
// required init(coder aDecoder: NSCoder!)
// super.init(coder : aDecoder)
// self.audioRecorder = AVAudioRecorder()
//
@IBOutlet weak var recordButton: UIButton!
@IBOutlet weak var playButton: UIButton!
@IBOutlet weak var saveButton: UIBarButtonItem!
var audioRecorder : AVAudioRecorder
var audioURL = ""
override func viewDidLoad()
super.viewDidLoad()
self.playButton.enabled = false
self.saveButton.enabled = false
// Do any additional setup after loading the view.
@IBAction func cancelTapped(sender: AnyObject)
self.dismissViewControllerAnimated(true, completion: nil)
@IBAction func saveTapped(sender: AnyObject)
@IBAction func recordTapped(sender: AnyObject)
self.playButton.enabled = true
@IBAction func playTapped(sender: AnyObject)
【问题讨论】:
1- 不要强制解开audioNSURL
,在之前使用if let
以保证它不为零。 2- 不要忽略catch
块中的错误。 // 这应该足以解决您的问题——或者能够正确调试它们。
【参考方案1】:
我看到一个强制展开的可选选项。用以下内容替换您的错误处理
if let url = audioNSURL
self.audioRecorder = try? AVAudioRecorder(URL: url, settings: recordSettings)
【讨论】:
【参考方案2】:感谢 Eric 和 Lukas。我对我的整个代码做了一些进一步的修改,毕竟我想我让它工作了。现在,它编译没有错误,也没有运行时崩溃。我只是发布我的工作代码的最终版本,以便如果其他人遇到类似问题,他们可以使用它。
再次感谢所有在 *** 上做出贡献的优秀人员。
import UIKit
import AVFoundation
class RecordViewController: UIViewController
var audioRecorder : AVAudioRecorder?
@IBOutlet weak var recordButton: UIButton!
@IBOutlet weak var playButton: UIButton!
@IBOutlet weak var saveButton: UIBarButtonItem!
override func viewDidLoad()
super.viewDidLoad()
self.playButton.enabled = false
self.saveButton.enabled = false
func setRecorder()
do
let baseString : String = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true).first!
let pathComponents = [baseString, "music.m4a"]
let audioURL = NSURL.fileURLWithPathComponents(pathComponents)
let session = AVAudioSession.sharedInstance()
try session.setCategory(AVAudioSessionCategoryPlayAndRecord)
try session.overrideOutputAudioPort(AVAudioSessionPortOverride.Speaker)
try session.setActive(true)
var recordSettings = [String : AnyObject]()
recordSettings[AVFormatIDKey] = Int(kAudioFormatMPEG4AAC)
recordSettings[AVSampleRateKey] = 44100.0
recordSettings[AVNumberOfChannelsKey] = 2
self.audioRecorder = try AVAudioRecorder(URL: audioURL!, settings: recordSettings)
self.audioRecorder!.meteringEnabled = true
self.audioRecorder!.prepareToRecord()
catch (_)
@IBAction func cancelTapped(sender: AnyObject)
self.dismissViewControllerAnimated(true, completion: nil)
@IBAction func saveTapped(sender: AnyObject)
@IBAction func recordTapped(sender: AnyObject)
self.playButton.enabled = true
@IBAction func playTapped(sender: AnyObject)
【讨论】:
当我将它导出到 swift 3.0 时,此代码不适用于 swift 3.0。以上是关于Swift 运行时错误 (exc_bad_access) AVAudioRecorder, recordSettings的主要内容,如果未能解决你的问题,请参考以下文章
Swift 运行时错误 (exc_bad_access) AVAudioRecorder, recordSettings