ios - AVAudioRecorder 线程 1 : EXC_BAD_ACCESS (code=1, 地址=0x0)

Question

我在优达学城学习 iOS 类(class)。我不知道为什么要运行下面的代码。它将在 try! 行中显示 Thread 1 的消息:EXC_BAD_ACCESS (code=1, address=0x0) audioRecorder = AVAudioRecorder(url: filePath!, settings: [:])

import UIKit
import AVFoundation

class RecordViewController: UIViewController, AVAudioRecorderDelegate {

    var audioRecorder = AVAudioRecorder()


    @IBOutlet weak var recordingLabel: UITextField!
    @IBOutlet weak var recordButton: UIButton!
    @IBOutlet weak var stopRecordingButton: UIButton!

    override func viewDidLoad() {
        super.viewDidLoad()
        stopRecordingButton.isEnabled = false

        // Do any additional setup after loading the view, typically from a nib.
    }

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        print("viewWillAppear called")
    }


    @IBAction func recordAudio(_ sender: AnyObject) {
        recordingLabel.text = "Recording in Progress"
        stopRecordingButton.isEnabled = true
        recordButton.isEnabled = false

        let dirPath = NSSearchPathForDirectoriesInDomains(.documentDirectory,.userDomainMask, true)[0] as String
        let recordingName = "recordedVoice.wav"
        let pathArray = [dirPath, recordingName]
        let filePath = URL(string: pathArray.joined(separator: "/"))

        let session = AVAudioSession.sharedInstance()
        try! session.setCategory(AVAudioSessionCategoryPlayAndRecord, with:AVAudioSessionCategoryOptions.defaultToSpeaker)

        try! audioRecorder = AVAudioRecorder(url: filePath!, settings: [:])
        audioRecorder.delegate = self
        audioRecorder.isMeteringEnabled = true
        audioRecorder.prepareToRecord()
        audioRecorder.record()
    }


    @IBAction func stopRecording(_ sender: Any) {
        recordButton.isEnabled = true
        stopRecordingButton.isEnabled = false
        recordingLabel.text = "Tap to Record"

        audioRecorder.stop()
        let audioSession = AVAudioSession.sharedInstance()
        try! audioSession.setActive(false)


    }

    func audioRecorderDidFinishRecording(_ recorder: AVAudioRecorder, successfully flag: Bool) {
        if flag{
            performSegue(withIdentifier: "stopRecording", sender: audioRecorder.url)
        }else {
            print("recording wasn't successful")

        }
    }
}

Answer 1

i think you must use try like this AVAudioPlayer

var resourcePath = url  //your url
var objectData = Data(contentsOf: NSURL(string: resourcePath)!)
var error: Error!
do {
    audioPlayer = try AVAudioPlayer(objectData)
}
catch let error {
}
audioPlayer.numberOfLoops = 0
audioPlayer.volume = 1.0
audioPlayer.prepareToPlay()
if audioPlayer == nil {
    print("\(error.description)")
}
else {
    audioPlayer.play()
}