fixed some bugs on ios

ios/OralTrainer/Views/TestView.swift

@@ -5,7 +5,7 @@ struct TestView: View {
     @ObservedObject var controller: PlayerController
     let onFullscreen: () -> Void
 
-    @State private var recorder: AVAudioRecorder?
+    @State private var recordingSession: AudioRecorderSession?
     @State private var recordingURL: URL?
     @State private var isRecording = false
     @State private var isAssessing = false
@@ -13,6 +13,7 @@ struct TestView: View {
     @State private var scoreSummary = "尚未评测"
     @State private var scoreDetail = ""
     @State private var dubSegments: [Int: URL] = [:]
+    @State private var dubRawSegments: [Int: URL] = [:]
     @State private var latestScores: [Int: ImitationAssessmentResult] = [:]
     @State private var mergedDubURL: URL?
     @State private var dubPlayer: AVPlayer?
@@ -82,7 +83,7 @@ struct TestView: View {
                     dubButton("播放配音", enabled: !dubSegments.isEmpty && !dubbingPlayback && !isGeneratingDub) {
                         toggleDubPlayback()
                     }
-                    dubButton("生成配音", enabled: !dubSegments.isEmpty && !dubbingPlayback && !isGeneratingDub) {
+                    dubButton("生成配音", enabled: !dubRawSegments.isEmpty && !dubbingPlayback && !isGeneratingDub) {
                         generateDubShareAudio()
                     }
                     dubButton("分享配音", enabled: mergedDubURL != nil && !dubbingPlayback && !isSharingDub) {
@@ -195,58 +196,99 @@ struct TestView: View {
     private func beginRecording() {
         let fileURL = FileManager.default.temporaryDirectory
             .appendingPathComponent("attempt-\(Int(Date().timeIntervalSince1970 * 1000)).m4a")
-        let settings: [String: Any] = [
-            AVFormatIDKey: Int(kAudioFormatMPEG4AAC),
-            AVSampleRateKey: 16_000,
-            AVNumberOfChannelsKey: 1,
-            AVEncoderBitRateKey: 96_000,
-            AVEncoderAudioQualityKey: AVAudioQuality.medium.rawValue,
-        ]
+        let newSession = AudioRecorderSession(outputURL: fileURL)
         do {
             let session = AVAudioSession.sharedInstance()
             try session.setCategory(.playAndRecord, mode: .default, options: [.defaultToSpeaker])
             try session.setActive(true)
-            let newRecorder = try AVAudioRecorder(url: fileURL, settings: settings)
-            guard newRecorder.record() else {
-                testStatus = "录音启动失败：无法开始录制"
+            guard session.isInputAvailable else {
+                testStatus = microphoneInputUnavailableMessage()
                 return
             }
-            recorder = newRecorder
+            do {
+                try newSession.start()
+            } catch {
+                try session.setActive(false, options: .notifyOthersOnDeactivation)
+                try session.setCategory(.playAndRecord, mode: .default, options: [.defaultToSpeaker])
+                try session.setActive(true)
+                try newSession.start()
+            }
+            recordingSession = newSession
             recordingURL = fileURL
             isRecording = true
             testStatus = "正在录音…读完当前句子后点击“停止并评测”"
+        } catch AudioRecorderSessionError.inputUnavailable {
+            newSession.cancel()
+            testStatus = microphoneInputUnavailableMessage()
+        } catch AudioRecorderSessionError.startFailed {
+            newSession.cancel()
+            testStatus = recordingStartFailedMessage()
         } catch {
+            newSession.cancel()
             testStatus = "录音启动失败：\(error.localizedDescription)"
         }
     }
 
+    private func microphoneInputUnavailableMessage() -> String {
+        #if targetEnvironment(simulator)
+        return "录音启动失败：未检测到麦克风输入。请在模拟器菜单 I/O → Audio Input 中选择输入设备，并允许“模拟器”使用 Mac 麦克风后重试"
+        #else
+        return "录音启动失败：未检测到麦克风输入。请检查 设置 → 隐私与安全性 → 麦克风 是否允许本 App 使用麦克风"
+        #endif
+    }
+
+    private func recordingStartFailedMessage() -> String {
+        #if targetEnvironment(simulator)
+        return "录音启动失败：无法开始录制。模拟器请确认 I/O → Audio Input 已选择输入设备，再重试"
+        #else
+        return "录音启动失败：无法开始录制。请确认麦克风未被其他应用占用后重试"
+        #endif
+    }
+
     private func stopRecordingAndAssess() {
-        guard let currentRecorder = recorder else {
+        guard let currentSession = recordingSession else {
+            return
+        }
+        let duration: TimeInterval
+        do {
+            try currentSession.stop()
+            duration = currentSession.recordDuration
+        } catch {
+            testStatus = "录音结束失败：\(error.localizedDescription)"
+            currentSession.cancel()
+            recordingSession = nil
+            isRecording = false
+            restorePlaybackAudioSession()
             return
         }
-        let duration = currentRecorder.currentTime
-        currentRecorder.stop()
         restorePlaybackAudioSession()
-        recorder = nil
+        recordingSession = nil
         isRecording = false
         guard let url = recordingURL else {
             return
         }
         recordingURL = nil
+        let rawURL = currentSession.rawRecordingURL
         if duration < 1.0 {
             testStatus = "录音太短或无法保存"
             try? FileManager.default.removeItem(at: url)
+            try? FileManager.default.removeItem(at: rawURL)
             return
         }
         guard let sentence = controller.currentSentence else {
             testStatus = "没有可归属的句子，本次录音已丢弃"
             try? FileManager.default.removeItem(at: url)
+            try? FileManager.default.removeItem(at: rawURL)
             return
         }
         if let oldURL = dubSegments[sentence.index] {
             try? FileManager.default.removeItem(at: oldURL)
         }
+        if let oldRawURL = dubRawSegments[sentence.index] {
+            try? FileManager.default.removeItem(at: oldRawURL)
+        }
         dubSegments[sentence.index] = url
+        dubRawSegments[sentence.index] = rawURL
         mergedDubURL = nil
         submitAssessment(recordingURL: url)
     }
@@ -292,7 +334,6 @@ struct TestView: View {
                 scoreSummary = "评测失败"
             }
             isAssessing = false
-            try? FileManager.default.removeItem(at: url)
         }
     }
 
@@ -399,8 +440,8 @@ struct TestView: View {
     }
 
     private func generateDubShareAudio() {
-        guard !dubSegments.isEmpty else { return }
-        let segments = dubSegments.sorted { $0.key < $1.key }
+        guard !dubRawSegments.isEmpty else { return }
+        let segments = dubRawSegments.sorted { $0.key < $1.key }
         let outputURL = FileManager.default.temporaryDirectory
             .appendingPathComponent("dubbing-\(Int(Date().timeIntervalSince1970 * 1000)).m4a")
         isGeneratingDub = true