语记手表版 v0.1：一键录音、WatchConnectivity 传输、表盘复杂功能、iPhone 接收转写

2026-10-28 15:24:18 +08:00
commit 0858e706c5
9 changed files with 523 additions and 0 deletions
@@ -0,0 +1,63 @@
+import AVFoundation
+import Foundation
+
+/// 手表端录音：AVAudioRecorder 写 AAC .m4a，存在手表 Documents 里，停后交给 WatchSessionManager 传到 iPhone。
+@MainActor
+final class WatchRecorder: ObservableObject {
+    @Published var isRecording = false
+    @Published var elapsed: TimeInterval = 0
+
+    private var recorder: AVAudioRecorder?
+    private var timer: Timer?
+    private var startDate: Date?
+    private(set) var currentFileURL: URL?
+
+    func requestPermission() async -> Bool {
+        await withCheckedContinuation { continuation in
+            AVAudioSession.sharedInstance().requestRecordPermission { granted in
+                continuation.resume(returning: granted)
+            }
+        }
+    }
+
+    func start() throws {
+        let session = AVAudioSession.sharedInstance()
+        try session.setCategory(.record, mode: .default)
+        try session.setActive(true)
+
+        let fileName = "watch-note-\(Int(Date().timeIntervalSince1970)).m4a"
+        let docs = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0]
+        let url = docs.appendingPathComponent(fileName)
+        currentFileURL = url
+
+        let settings: [String: Any] = [
+            AVFormatIDKey: Int(kAudioFormatMPEG4AAC),
+            AVSampleRateKey: 44_100,
+            AVNumberOfChannelsKey: 1,
+            AVEncoderAudioQualityKey: AVAudioQuality.high.rawValue
+        ]
+        recorder = try AVAudioRecorder(url: url, settings: settings)
+        recorder?.record()
+
+        isRecording = true
+        startDate = Date()
+        elapsed = 0
+        timer = Timer.scheduledTimer(withTimeInterval: 0.2, repeats: true) { [weak self] _ in
+            Task { @MainActor in
+                guard let self, let start = self.startDate else { return }
+                self.elapsed = Date().timeIntervalSince(start)
+            }
+        }
+    }
+
+    /// 停止录音，返回录音文件 URL（nil 表示没录成）
+    func stop() -> URL? {
+        timer?.invalidate()
+        timer = nil
+        recorder?.stop()
+        recorder = nil
+        isRecording = false
+        try? AVAudioSession.sharedInstance().setActive(false)
+        return currentFileURL
+    }
+}