AVAudioRecorder 无法在 iPhone 5S 上运行

使用AVAudioRecorder在iPhone 5S上无法录音的问题

swift
import UIKit
import AVFoundation
class ViewController: UIViewController {
    var audioRecorder: AVAudioRecorder!
    override func viewDidLoad() {
        super.viewDidLoad()
        let button = UIButton(frame: CGRect(x: 100, y: 100, width: 200, height: 50))
        button.setTitle("开始录音", for: .normal)
        button.backgroundColor = .blue
        button.addTarget(self, action: #selector(startRecording), for: .touchUpInside)
        view.addSubview(button)
    }
    @objc func startRecording() {
        let audioFilename = getDocumentsDirectory().appendingPathComponent("recording.wav")
        let settings = [
            AVFormatIDKey: Int(kAudioFormatLinearPCM),
            AVSampleRateKey: 44100,
            AVNumberOfChannelsKey: 2,
            AVEncoderAudioQualityKey: AVAudioQuality.high.rawValue
        ]
        
        do {
            let session = AVAudioSession.sharedInstance()
            try session.setCategory(.playAndRecord, mode: .default)
            try session.setActive(true)
            
            audioRecorder = try AVAudioRecorder(url: audioFilename, settings: settings)
            audioRecorder.record()
        } catch {
            print("录音失败：\(error.localizedDescription)")
        }
    }
    func getDocumentsDirectory() -> URL {
        let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)
        let documentsDirectory = paths[0]
        return documentsDirectory
    }
}
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
    var window: UIWindow?
    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        // 设置音频会话
        do {
            try AVAudioSession.sharedInstance().setCategory(.playAndRecord, mode: .default)
            try AVAudioSession.sharedInstance().setActive(true)
        } catch {
            print("设置音频会话失败：\(error.localizedDescription)")
        }
        
        return true
    }
}

swift
@objc func startRecording() {
    let audioFilename = getDocumentsDirectory().appendingPathComponent("recording.wav")
    let settings = [
        AVFormatIDKey: Int(kAudioFormatLinearPCM),
        AVSampleRateKey: 44100,
        AVNumberOfChannelsKey: 2,
        AVEncoderAudioQualityKey: AVAudioQuality.high.rawValue
    ]
    
    do {
        let session = AVAudioSession.sharedInstance()
        try session.setCategory(.playAndRecord, mode: .default)
        try session.setActive(true)
        
        audioRecorder = try AVAudioRecorder(url: audioFilename, settings: settings)
        audioRecorder.record()
    } catch {
        print("录音失败：\(error.localizedDescription)")
    }
}