运行报错 -- Error occurred in anonymous codeblock; filename: ; position: 2758; line: 65 -- MAXScript Rollout Handler Exception: -- Runtime error: callbacks.addScript() unrecognized callback type: #timeSliderChange -- MAXScript callstack: -- thread data: threadID:26976 -- ------------------------------------------------------ -- [stack level: 0] -- In registerCallback(); filename: ; position: 2759; line: 65 -- member of: Rollout:GIFPlayer -- Locals: -- callbackStr: "fn updateFrameFromTime = ( try ( if isValidObj ::GIFPlayer and ::GIFPlayer.gifFrames.count > 0 do ( local currentTime = sliderTime.frame as integer if currentTime != ::GIFPlayer.lastSliderTime do ( ::GIFPlayer.lastSliderTime = currentTime ::GIFPlayer.currentFrame = currentTime + 1 if ::GIFPlayer.currentFrame > ::GIFPlayer.frameCount do ::GIFPlayer.currentFrame = ::GIFPlayer.frameCount if ::GIFPlayer.currentFrame < 1 do ::GIFPlayer.currentFrame = 1 ::GIFPlayer.picBox.image = ::GIFPlayer.gifFrames[::GIFPlayer.currentFrame] ::GIFPlayer.pbFrame.value = (::GIFPlayer.currentFrame as float / ::GIFPlayer.frameCount * 100) ::GIFPlayer.lblStatus.text = "帧: " + ::GIFPlayer.currentFrame as string + "/" + ::GIFPlayer.frameCount as string ) ) ) catch (format "回调错误: %\n" (getCurrentException())) )" -- Externals: -- callbackID: "GIFPlayerCallback_7958" -- owner: Rollout:GIFPlayer -- GIFPlayer: Rollout:GIFPlayer -- ------------------------------------------------------ -- [stack level: 1] -- called from GIFPlayer.open(); filename: ; position: 4314; line: 120 -- member of: Rollout:GIFPlayer -- Locals: -- Externals: -- registerCallback: registerCallback() -- picBox: RolloutControl:picBox in rollout:GIFPlayer : dotNetControl:picBox:System.Windows.Forms.PictureBox -- owner: Rollout:GIFPlayer -- GIFPlayer: Rollout:GIFPlayer -- ------------------------------------------------------ -- [stack level: 2] -- called from top-level

<think>我们遇到了一个新的错误：`callbacks.addScript() unrecognized callback type: #timeSliderChange` 这个错误表明在调用`callbacks.addScript`时，使用了不存在的回调事件类型`#timeSliderChange`。 在3ds Max中，回调事件类型应该是`#timeSliderChange`还是`#timeSliderChanged`？实际上，正确的回调事件类型是`#timeSliderChanged`（带'd'）。 因此，我们需要将代码中的`#timeSliderChange`改为`#timeSliderChanged`。 修改点： 在注册回调的地方，将事件类型从`#timeSliderChange`改为`#timeSliderChanged`。 另外，我们还需要注意，在移除回调时，我们使用的是`callbacks.removeScripts id:callbackID`，这是正确的。 以下是修复后的代码部分（仅修改了事件类型）：</think>### 修复回调类型错误的完整代码 问题在于使用了错误的回调事件类型 `#timeSliderChange`，正确的事件类型应该是 `#timeSliderChanged`（带后缀"d"）。以下是完全修复的代码： ```maxscript try(DestroyDialog ::GIFPlayer)catch() rollout GIFPlayer "高级GIF播放器" width:320 height:450 ( local gifFrames = #() local currentFrame = 1 local isPlaying = false local gifFileName = "" local frameCount = 0 local lastSliderTime = 0 local callbackID = "GIFPlayerCallback_" + (random 1 10000) as string -- 界面控件 button btnLoad "加载GIF" width:300 height:30 align:#center label lblFileName "未加载文件" align:#center dotNetControl picBox "System.Windows.Forms.PictureBox" width:300 height:300 align:#center button btnPlay "播放" width:80 height:30 align:#left across:3 button btnPause "暂停" width:80 height:30 align:#center button btnStop "停止" width:80 height:30 align:#right button btnPrev "上一帧" width:80 height:30 align:#left across:3 button btnNext "下一帧" width:80 height:30 align:#center button btnSync "同步时间轴" width:100 height:30 align:#center progressBar pbFrame align:#center width:300 height:15 label lblStatus "就绪" align:#center offset:[0,5] checkbox chkAutoSync "自动同步时间轴" checked:true align:#center -- 关键修复：在事件处理程序前定义所有函数 fn registerCallback = ( -- 移除旧回调 callbacks.removeScripts id:callbackID -- 创建回调函数字符串 local callbackStr = "fn updateFrameFromTime = ( try ( if isValidObj ::GIFPlayer and ::GIFPlayer.gifFrames.count > 0 do ( local currentTime = sliderTime.frame as integer if currentTime != ::GIFPlayer.lastSliderTime do ( ::GIFPlayer.lastSliderTime = currentTime ::GIFPlayer.currentFrame = currentTime + 1 if ::GIFPlayer.currentFrame > ::GIFPlayer.frameCount do ::GIFPlayer.currentFrame = ::GIFPlayer.frameCount if ::GIFPlayer.currentFrame < 1 do ::GIFPlayer.currentFrame = 1 ::GIFPlayer.picBox.image = ::GIFPlayer.gifFrames[::GIFPlayer.currentFrame] ::GIFPlayer.pbFrame.value = (::GIFPlayer.currentFrame as float / ::GIFPlayer.frameCount * 100) ::GIFPlayer.lblStatus.text = \"帧: \" + ::GIFPlayer.currentFrame as string + \"/\" + ::GIFPlayer.frameCount as string ) ) ) catch (format \"回调错误: %\\n\" (getCurrentException())) )" -- 执行回调函数定义 execute callbackStr -- 注册回调（关键修复：使用正确的回调类型） callbacks.addScript #timeSliderChanged "updateFrameFromTime()" id:callbackID format "回调已注册: %\n" callbackID ) fn cleanupAllResources = ( -- 停止动画 if isPlaying do stopAnimation() isPlaying = false -- 移除回调 callbacks.removeScripts id:callbackID format "回调已移除: %\n" callbackID -- 清理图片资源 if (picBox.image != undefined) do picBox.image = undefined for bmp in gifFrames do ( try (if isProperty bmp #Dispose then bmp.Dispose()) catch () ) gifFrames = #() -- 重置状态 lblFileName.text = "未加载文件" pbFrame.value = 0 pbFrame.color = (color 200 200 200) currentFrame = 1 frameCount = 0 gifFileName = "" lblStatus.text = "就绪" lastSliderTime = 0 gc light:true ) fn updateDisplay = ( if gifFrames.count > 0 and currentFrame <= gifFrames.count do ( try ( picBox.image = gifFrames[currentFrame] pbFrame.value = (currentFrame as float / frameCount * 100) lblStatus.text = "帧: " + currentFrame as string + "/" + frameCount as string ) catch (format "显示错误: %\n" (getCurrentException())) ) ) -- 初始化 on GIFPlayer open do ( picBox.BorderStyle = picBox.BorderStyle.FixedSingle picBox.SizeMode = picBox.SizeMode.Zoom registerCallback() -- 现在可以正确调用 ) -- 加载GIF on btnLoad pressed do ( local file = getOpenFileName caption:"选择GIF文件" types:"GIF文件(*.gif)|*.gif" if file != undefined do ( cleanupAllResources() gifFileName = file lblFileName.text = filenameFromPath file lblStatus.text = "加载中..." -- 使用DotNet加载GIF local netImage = dotNetClass "System.Drawing.Image" local gifImage = netImage.FromFile file local dimension = dotNetClass "System.Drawing.Imaging.FrameDimension" local frameDim = dimension.Time frameCount = gifImage.GetFrameCount frameDim -- 提取所有帧 for i = 0 to frameCount-1 do ( gifImage.SelectActiveFrame frameDim i local frameBmp = dotNetObject "System.Drawing.Bitmap" gifImage.width gifImage.height local g = (dotNetClass "System.Drawing.Graphics").FromImage frameBmp g.DrawImage gifImage 0 0 gifImage.width gifImage.height g.Dispose() append gifFrames frameBmp ) if gifFrames.count > 0 then ( currentFrame = 1 updateDisplay() pbFrame.color = green lblStatus.text = "已加载: " + frameCount as string + " 帧" -- 自动同步时间轴 if chkAutoSync.checked do ( animationRange = interval 0f (frameCount as time - 1f) sliderTime = 0f lblStatus.text = "时间轴已自动同步" ) -- 重新注册回调 registerCallback() ) else ( messageBox "未能加载任何帧！" title:"错误" lblStatus.text = "加载失败" ) gifImage.Dispose() ) ) -- 播放控制 on btnPlay pressed do ( if gifFrames.count > 0 do ( isPlaying = true playAnimation() lblStatus.text = "播放中..." ) ) on btnPause pressed do ( isPlaying = false stopAnimation() lblStatus.text = "已暂停" ) on btnStop pressed do ( isPlaying = false stopAnimation() if gifFrames.count > 0 do ( currentFrame = 1 updateDisplay() sliderTime = 0f lblStatus.text = "已停止" ) ) -- 帧导航 on btnPrev pressed do ( if gifFrames.count > 0 do ( isPlaying = false stopAnimation() currentFrame -= 1 if currentFrame < 1 do currentFrame = frameCount updateDisplay() sliderTime = (currentFrame - 1) as time ) ) on btnNext pressed do ( if gifFrames.count > 0 do ( isPlaying = false stopAnimation() currentFrame += 1 if currentFrame > frameCount do currentFrame = 1 updateDisplay() sliderTime = (currentFrame - 1) as time ) ) -- 同步时间轴 on btnSync pressed do ( if frameCount > 0 do ( animationRange = interval 0f (frameCount as time - 1f) sliderTime = 0f currentFrame = 1 updateDisplay() lblStatus.text = "时间轴已同步" ) ) -- 关闭窗口 on GIFPlayer close do ( cleanupAllResources() ) ) -- 创建对话框 createDialog GIFPlayer ``` ### 关键修复点： 1. **回调类型修正**： ```maxscript -- 错误类型 callbacks.addScript #timeSliderChange ... ; 缺少"d"后缀 -- 正确类型 callbacks.addScript #timeSliderChanged ... ; 添加"d"后缀 ``` 2. **MAXScript回调事件类型**： - 正确事件类型：`#timeSliderChanged`（带"d"后缀） - 其他常用回调事件： - `#filePostOpen`：文件打开后 - `#systemPostNew`：新建场景后 - `#preRenderFrame`：渲染每帧前 - `#postRenderFrame`：渲染每帧后 3. **调试信息增强**： ```maxscript format "回调已注册: %\n" callbackID ; 输出注册信息 format "回调已移除: %\n" callbackID ; 输出移除信息 ``` - 添加详细日志帮助调试 - 可验证回调生命周期 4. **错误处理改进**： ```maxscript catch (format "回调错误: %\n" (getCurrentException())) ``` - 捕获并显示回调执行中的异常 - 防止单个错误导致整个回调失效 ### 错误原因分析： 1. **MAXScript回调规则**： - 回调事件名称必须完全匹配 - `#timeSliderChange` 是无效事件类型 - `#timeSliderChanged` 是正确的事件类型（当时间滑块改变时触发） 2. **官方文档参考**： - 根据3ds Max SDK文档，正确事件类型是： ```maxscript #timeSliderChanged ``` - 该事件在用户移动时间滑块或通过脚本改变当前帧时触发 ### 验证方法： 1. **基本验证**： - 打开窗口时监听器应显示： ``` -- 回调已注册: GIFPlayerCallback_12345 ``` 2. **时间滑块交互**： - 移动时间滑块时，GIF帧应同步更新 - 进度条和状态标签应实时变化 3. **资源清理**： - 关闭窗口时监听器应显示： ``` -- 回调已移除: GIFPlayerCallback_12345 ``` 4. **GIF加载验证**： - 加载新GIF时，旧回调被移除，新回调被注册 - 输出应显示两次回调操作： ``` -- 回调已移除: GIFPlayerCallback_12345 -- 回调已注册: GIFPlayerCallback_67890 ``` 此版本已解决回调类型错误，确保时间滑块改变时正确触发帧更新。