修复音量控制不生效的问题

local_plugins/agent_service/ios/agent_service/Sources/agent_service/AudioSessionHub.swift

@@ -541,11 +541,19 @@ public class AudioSessionHub {
     }
     
     private func performVolumeControlWithMPVolumeView(action: VolumeControlAction, value: Float?, completion: @escaping (Bool, String) -> Void) {
-        // 创建更大的 frame，有助于子视图正确初始化
+        // 确保在有音频会话的情况下进行音量控制
+        do {
+            try audioSession.setActive(true)
+            // 设置为播放类别，这样音量控制才能生效
+            try audioSession.setCategory(.playback, mode: .default, options: [])
+        } catch {
+            os_log("设置音频会话失败: %{public}@", log: logger, type: .error, error.localizedDescription)
+        }
+        
         let volumeView = MPVolumeView(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
         volumeView.showsVolumeSlider = true
         volumeView.showsRouteButton = false
-        volumeView.alpha = 0.01  // 几乎透明
+        volumeView.alpha = 0.01
         
         guard let windowScene = UIApplication.shared.connectedScenes.first as? UIWindowScene,
               let window = windowScene.windows.first else {
@@ -557,71 +565,63 @@ public class AudioSessionHub {
         volumeView.setNeedsLayout()
         volumeView.layoutIfNeeded()
         
-        var retryCount = 0
-        let maxRetries = 5
-        
-        func attemptVolumeControl() {
-            DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
-                os_log("尝试第 %d 次音量控制", log: self.logger, type: .debug, retryCount + 1)
-                
-                // 递归查找滑块
-                func findSliderRecursively(in view: UIView) -> UISlider? {
-                    if let slider = view as? UISlider {
-                        return slider
-                    }
-                    for subview in view.subviews {
-                        if let foundSlider = findSliderRecursively(in: subview) {
-                            return foundSlider
-                        }
+        // 增加延迟时间，确保滑块完全初始化
+        DispatchQueue.main.asyncAfter(deadline: .now() + 2.0) {
+            func findSliderRecursively(in view: UIView) -> UISlider? {
+                if let slider = view as? UISlider {
+                    return slider
+                }
+                for subview in view.subviews {
+                    if let foundSlider = findSliderRecursively(in: subview) {
+                        return foundSlider
                     }
-                    return nil
                 }
+                return nil
+            }
+            
+            if let slider = findSliderRecursively(in: volumeView) {
+                let currentValue = slider.value
+                let newValue: Float
                 
-                if let slider = findSliderRecursively(in: volumeView) {
-                    let currentValue = slider.value
-                    let newValue: Float
-                    
-                    switch action {
-                    case .increase:
-                        newValue = min(currentValue + 0.2, 1.0)  // 从 0.1 改为 0.2 (20%)
-                    case .decrease:
-                        newValue = max(currentValue - 0.2, 0.0)  // 从 0.1 改为 0.2 (20%)
-                    case .mute:
-                        newValue = 0.0
-                    case .setMax:
-                        newValue = 1.0
-                    case .setValue(let val):
-                        newValue = max(0.0, min(val, 1.0))
-                    }
-                    
-                    os_log("设置音量从 %.2f 到 %.2f", log: self.logger, type: .info, currentValue, newValue)
-                    
+                switch action {
+                case .increase:
+                    newValue = min(currentValue + 0.1, 1.0)  // 改回0.1避免变化过大
+                case .decrease:
+                    newValue = max(currentValue - 0.1, 0.0)
+                case .mute:
+                    newValue = 0.0
+                case .setMax:
+                    newValue = 1.0
+                case .setValue(let val):
+                    newValue = max(0.0, min(val, 1.0))
+                }
+                
+                os_log("设置音量从 %.2f 到 %.2f", log: self.logger, type: .info, currentValue, newValue)
+                
+                // 模拟用户触摸操作
+                slider.setValue(newValue, animated: true)
+                slider.sendActions(for: .touchDown)
+                slider.sendActions(for: .valueChanged)
+                slider.sendActions(for: .touchUpInside)
+                
+                // 再次确认设置
+                DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
                     slider.value = newValue
                     slider.sendActions(for: .valueChanged)
-                    slider.sendActions(for: .touchUpInside)
-                    
-                    let message = self.getVolumeActionMessage(action: action)
-                    completion(true, message)
-                    volumeView.removeFromSuperview()
-                } else {
-                    retryCount += 1
-                    if retryCount < maxRetries {
-                        os_log("音量控制重试 %d/%d", log: self.logger, type: .debug, retryCount, maxRetries)
-                        attemptVolumeControl()
-                    } else {
-                        os_log("所有重试都失败，使用备选方案", log: self.logger, type: .error)
-                        volumeView.removeFromSuperview()
-                        
-                        // 备选方案：至少记录当前音量状态
-                        let currentVolume = self.audioSession.outputVolume
-                        let message = "音量控制请求已处理（当前音量: \(Int(currentVolume * 100))%）"
-                        completion(true, message)
-                    }
                 }
+                
+                let message = self.getVolumeActionMessage(action: action)
+                completion(true, message)
+                volumeView.removeFromSuperview()
+            } else {
+                os_log("无法找到音量滑块", log: self.logger, type: .error)
+                volumeView.removeFromSuperview()
+                
+                // 提供用户友好的反馈
+                let message = "音量控制需要在播放音频时才能生效，请先播放音频后再调整音量"
+                completion(false, message)
             }
         }
-        
-        attemptVolumeControl()
     }
     
     private func getVolumeActionMessage(action: VolumeControlAction) -> String {