optimize the appicon of iOS

ios/OralTrainer/Views/TestView.swift

@@ -12,6 +12,18 @@ struct TestView: View {
     @State private var testStatus = "请先在训练模块选择一个云端课程"
     @State private var scoreSummary = "尚未评测"
     @State private var scoreDetail = ""
+    @State private var dubSegments: [Int: URL] = [:]
+    @State private var latestScores: [Int: ImitationAssessmentResult] = [:]
+    @State private var mergedDubURL: URL?
+    @State private var dubPlayer: AVPlayer?
+    @State private var dubbingPlayback = false
+    @State private var dubbingStatus = "配音：尚未生成"
+    @State private var isGeneratingDub = false
+    @State private var isSharingDub = false
+    @State private var shareURL: URL?
+    @State private var showShareSheet = false
+    @State private var dubPlaybackObserver: NSObjectProtocol?
+    @State private var testSubtitleVisible = true
 
     var body: some View {
         ScrollView(showsIndicators: false) {
@@ -20,8 +32,15 @@ struct TestView: View {
                     controller: controller,
                     showsContinuousToggle: false,
                     continuousPlayback: .constant(true),
+                    showsSubtitle: $testSubtitleVisible,
                     onFullscreen: onFullscreen
                 )
+                if testSubtitleVisible {
+                    Text(controller.currentSentence?.text ?? "当前句子")
+                        .font(.system(size: 15))
+                        .foregroundColor(Theme.textDark)
+                        .frame(maxWidth: .infinity, alignment: .leading)
+                }
                 VStack(alignment: .leading, spacing: 10) {
                 Text("朗读评测（测试）")
                     .font(.system(size: 16, weight: .bold))
@@ -30,6 +49,12 @@ struct TestView: View {
                     .font(.system(size: 13))
                     .foregroundColor(Theme.accentDeep)
                     .fixedSize(horizontal: false, vertical: true)
+                HStack(spacing: 8) {
+                    Toggle("显示字幕", isOn: $testSubtitleVisible)
+                        .font(.system(size: 13, weight: .bold))
+                        .foregroundColor(Theme.textDark)
+                        .tint(Theme.accent)
+                }
                 HStack(spacing: 8) {
                     sentenceButton("上一句") {
                         controller.seekToPreviousSentence()
@@ -53,6 +78,21 @@ struct TestView: View {
                 }
                 .buttonStyle(.plain)
                 .disabled(isAssessing)
+                HStack(spacing: 8) {
+                    dubButton("播放配音", enabled: !dubSegments.isEmpty && !dubbingPlayback && !isGeneratingDub) {
+                        toggleDubPlayback()
+                    }
+                    dubButton("生成配音", enabled: !dubSegments.isEmpty && !dubbingPlayback && !isGeneratingDub) {
+                        generateDubShareAudio()
+                    }
+                    dubButton("分享配音", enabled: mergedDubURL != nil && !dubbingPlayback && !isSharingDub) {
+                        shareMergedDub()
+                    }
+                }
+                Text(dubbingStatus)
+                    .font(.system(size: 13))
+                    .foregroundColor(Theme.accentDeep)
+                    .frame(maxWidth: .infinity, alignment: .leading)
                 Text(scoreSummary)
                     .font(.system(size: 22, weight: .bold))
                     .foregroundColor(Theme.textDark)
@@ -78,6 +118,14 @@ struct TestView: View {
         .onReceive(controller.$currentSentence) { _ in
             refreshTestUI()
         }
+        .onDisappear {
+            stopDubPlayback(message: nil)
+        }
+        .sheet(isPresented: $showShareSheet) {
+            if let url = shareURL {
+                ActivityShareSheet(items: [url])
+            }
+        }
     }
 
     private func sentenceButton(_ label: String, action: @escaping () -> Void) -> some View {
@@ -93,6 +141,20 @@ struct TestView: View {
         .buttonStyle(.plain)
     }
 
+    private func dubButton(_ label: String, enabled: Bool, action: @escaping () -> Void) -> some View {
+        Button(action: action) {
+            Text(label)
+                .font(.system(size: 13, weight: .bold))
+                .foregroundColor(.white)
+                .frame(maxWidth: .infinity)
+                .frame(height: 38)
+                .background(enabled ? Theme.buttonBlue : Theme.border)
+                .clipShape(RoundedRectangle(cornerRadius: 8))
+        }
+        .buttonStyle(.plain)
+        .disabled(!enabled)
+    }
+
     // MARK: - 录音
 
     private func toggleRecording() {
@@ -176,6 +238,16 @@ struct TestView: View {
             try? FileManager.default.removeItem(at: url)
             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)
+            return
+        }
+        if let oldURL = dubSegments[sentence.index] {
+            try? FileManager.default.removeItem(at: oldURL)
+        }
+        dubSegments[sentence.index] = url
+        mergedDubURL = nil
         submitAssessment(recordingURL: url)
     }
 
@@ -269,6 +341,119 @@ struct TestView: View {
             testStatus = "请先在训练模块选择一个云端课程"
             return
         }
-        testStatus = "评测对象：第 \(sentence.index + 1) 句（共 \(item.sentences.count) 句）"
+        let currentRecording = dubSegments[sentence.index]
+        let segmentLabel = currentRecording == nil ? "" : " · 本句已录音，重录将覆盖"
+        testStatus = "评测对象：第 \(sentence.index + 1) 句（共 \(item.sentences.count) 句）\(segmentLabel)"
+        if mergedDubURL == nil {
+            dubbingStatus = dubSegments.isEmpty ? "配音：请先录音" : "配音：已保存 \(dubSegments.count) 句，可生成配音"
+        }
+    }
+
+    // MARK: - 配音
+
+    private func toggleDubPlayback() {
+        if dubbingPlayback {
+            stopDubPlayback(message: "已停止配音播放")
+            return
+        }
+        let sentence = controller.currentSentence
+        let audioURL = mergedDubURL ?? sentence.flatMap { dubSegments[$0.index] }
+        guard let audioURL else { return }
+        if mergedDubURL == nil, let sentence = sentence {
+            controller.seek(to: sentence.startMs)
+        }
+        controller.pause()
+        controller.setVolume(0)
+        let player = dubPlayer ?? AVPlayer()
+        dubPlayer = player
+        player.replaceCurrentItem(with: AVPlayerItem(url: audioURL))
+        dubbingPlayback = true
+        dubbingStatus = mergedDubURL == nil ? "正在播放当前句配音，视频原声静音" : "正在播放整段配音，视频原声静音"
+        player.play()
+        if dubPlaybackObserver == nil {
+            dubPlaybackObserver = NotificationCenter.default.addObserver(
+                forName: AVPlayerItem.didPlayToEndTimeNotification,
+                object: player.currentItem,
+                queue: .main
+            ) { _ in
+                DispatchQueue.main.asyncAfter(deadline: .now() + 0.25) {
+                    stopDubPlayback(message: "配音播放完成")
+                }
+            }
+        }
+    }
+
+    private func stopDubPlayback(message: String?) {
+        dubPlayer?.pause()
+        dubPlayer?.seek(to: .zero)
+        controller.pause()
+        controller.setVolume(1)
+        dubbingPlayback = false
+        if let dubPlaybackObserver {
+            NotificationCenter.default.removeObserver(dubPlaybackObserver)
+            self.dubPlaybackObserver = nil
+        }
+        if let message {
+            dubbingStatus = message
+        }
+    }
+
+    private func generateDubShareAudio() {
+        guard !dubSegments.isEmpty else { return }
+        let segments = dubSegments.sorted { $0.key < $1.key }
+        let outputURL = FileManager.default.temporaryDirectory
+            .appendingPathComponent("dubbing-\(Int(Date().timeIntervalSince1970 * 1000)).m4a")
+        isGeneratingDub = true
+        dubbingStatus = "正在合成 \(segments.count) 句配音…"
+        Task {
+            do {
+                try await DubbingCompositor.merge(urls: segments.map(\.value), outputURL: outputURL)
+                if let oldURL = mergedDubURL {
+                    try? FileManager.default.removeItem(at: oldURL)
+                }
+                mergedDubURL = outputURL
+                dubbingStatus = "已合成 \(segments.count) 句配音，可点击“分享配音”"
+            } catch {
+                dubbingStatus = "合成失败：\(error.localizedDescription)"
+            }
+            isGeneratingDub = false
+        }
+    }
+
+    private func shareMergedDub() {
+        guard let item = controller.currentItem, mergedDubURL != nil else { return }
+        guard item.id.range(of: AppConfig.sha256Pattern, options: .regularExpression) != nil else {
+            dubbingStatus = "分享失败：网页分享仅支持云端课程视频"
+            return
+        }
+        isSharingDub = true
+        dubbingStatus = "正在生成分享链接…"
+        let request = DubShareUploadRequest(
+            videoHash: item.id,
+            title: item.title,
+            segments: dubSegments.map { ($0.key, $0.value) },
+            scores: latestScores
+        )
+        Task {
+            do {
+                let link = try await ImitationAssessor.uploadDubShare(request: request)
+                shareURL = URL(string: link)
+                showShareSheet = true
+                dubbingStatus = "已生成分享链接：\(link)"
+            } catch {
+                dubbingStatus = "分享失败：\(error.localizedDescription)"
+            }
+            isSharingDub = false
+        }
     }
 }
+
+struct ActivityShareSheet: UIViewControllerRepresentable {
+    let items: [Any]
+
+    func makeUIViewController(context: Context) -> UIActivityViewController {
+        UIActivityViewController(activityItems: items, applicationActivities: nil)
+    }
+
+    func updateUIViewController(_ uiViewController: UIActivityViewController, context: Context) {}
+}