错误描述：

在 Windows 上打 PC 包时遇到了这样的报错：

Console 输出的详细错误日志：

IOException: Failed to Move File / Directory from 'Temp/StagingArea\bunny rummy_Data\StreamingAssets\lua\logic\ui\pnl_activity\first_add_cash\first_add_cash_activity_preselected_item\ui_first_add_cash_activity_preselected_item_logic.lua' to 'C:\TS\rummy_itc\Assets\..\z_package\debug\bunny_rummy_8-3-3-4_v1.0.1.20_20200427_153115\bunny rummy_Data\StreamingAssets\lua\logic\ui\pnl_activity\first_add_cash\first_add_cash_activity_preselected_item\ui_first_add_cash_activity_preselected_item_logic.lua'.
UnityEditor.FileUtil.MoveFileOrDirectory (System.String source, System.String dest) (at C:/buildslave/unity/build/Editor/Mono/FileUtil.bindings.cs:77)
DesktopStandalonePostProcessor.CopyFilesToDestination (System.String source, System.String target, System.Collections.Generic.HashSet`1[T] filesToNotOverwrite) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/DesktopStandalonePostProcessor.cs:428)
DesktopStandalonePostProcessor.CopyFilesToDestination (System.String source, System.String target, System.Collections.Generic.HashSet`1[T] filesToNotOverwrite) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/DesktopStandalonePostProcessor.cs:432)
DesktopStandalonePostProcessor.CopyFilesToDestination (System.String source, System.String target, System.Collections.Generic.HashSet`1[T] filesToNotOverwrite) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/DesktopStandalonePostProcessor.cs:432)
DesktopStandalonePostProcessor.CopyFilesToDestination (System.String source, System.String target, System.Collections.Generic.HashSet`1[T] filesToNotOverwrite) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/DesktopStandalonePostProcessor.cs:432)
DesktopStandalonePostProcessor.CopyFilesToDestination (System.String source, System.String target, System.Collections.Generic.HashSet`1[T] filesToNotOverwrite) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/DesktopStandalonePostProcessor.cs:432)
DesktopStandalonePostProcessor.CopyFilesToDestination (System.String source, System.String target, System.Collections.Generic.HashSet`1[T] filesToNotOverwrite) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/DesktopStandalonePostProcessor.cs:432)
DesktopStandalonePostProcessor.CopyFilesToDestination (System.String source, System.String target, System.Collections.Generic.HashSet`1[T] filesToNotOverwrite) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/DesktopStandalonePostProcessor.cs:432)
DesktopStandalonePostProcessor.CopyFilesToDestination (System.String source, System.String target, System.Collections.Generic.HashSet`1[T] filesToNotOverwrite) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/DesktopStandalonePostProcessor.cs:432)
DesktopStandalonePostProcessor.CopyFilesToDestination (System.String source, System.String target, System.Collections.Generic.HashSet`1[T] filesToNotOverwrite) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/DesktopStandalonePostProcessor.cs:432)
DesktopStandalonePostProcessor.CopyStagingAreaIntoDestination (UnityEditor.Modules.BuildPostProcessArgs args, System.Collections.Generic.HashSet`1[T] filesToNotOverwrite) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/DesktopStandalonePostProcessor.cs:402)
DesktopStandalonePostProcessor.PostProcess (UnityEditor.Modules.BuildPostProcessArgs args) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/DesktopStandalonePostProcessor.cs:51)
UnityEditor.BuildPipeline:BuildPlayer(String[], String, BuildTarget, BuildOptions)
PackAppPatch:GenPackage() (at Assets/Code/Editor/Package/PackAppPatch.cs:342)
PackAppPatch:DoPackApp(CPackArg) (at Assets/Code/Editor/Package/PackAppPatch.cs:203)
PackGUI:OnClickPackage() (at Assets/Code/Editor/Package/PackGUI.cs:54)
PackGUI:BranchConfirm(Action) (at Assets/Code/Editor/Package/PackGUI.cs:311)
<>c__DisplayClass9_0:<OnGUI>b__1() (at Assets/Code/Editor/Package/PackGUI.cs:112)
GuiUtil:RegSceneBtn(String, String, Action) (at Assets/Code/Editor/GuiUtil.cs:30)
PackGUI:OnGUI() (at Assets/Code/Editor/Package/PackGUI.cs:110)
PackGUI:Draw() (at Assets/Code/Editor/Package/PackGUI.cs:23)
UtilTemplate`2:OnGUI() (at Assets/Code/Editor/UtilBase/UtilTemplate.cs:55)
UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

看起来貌似是拷贝文件时拷贝失败了，核心的报错内容是这部分：

IOException: Failed to Move File / Directory from 'Temp/StagingArea\bunny rummy_Data\StreamingAssets\lua\logic\ui\pnl_activity\first_add_cash\first_add_cash_activity_preselected_item\ui_first_add_cash_activity_preselected_item_logic.lua' to 'C:\TS\rummy_itc\Assets\..\z_package\debug\bunny_rummy_8-3-3-4_v1.0.1.20_20200427_153115\bunny rummy_Data\StreamingAssets\lua\logic\ui\pnl_activity\first_add_cash\first_add_cash_activity_preselected_item\ui_first_add_cash_activity_preselected_item_logic.lua'.
UnityEditor.FileUtil.MoveFileOrDirectory (System.String source, System.String dest) (at C:/buildslave/unity/build/Editor/Mono/FileUtil.bindings.cs:77)

即调用 UnityEditor.FileUtil.MoveFileOrDirectory API 去复制文件的时候出错了。

错误分析：

应该是路径长度问题，在 Windows API 中，通过 MAX_PATH 来限制路径得最大长度，MAX_PATH 被定义为 260。本次选择的路径长度很长，特别是复制目标文件的路径 ‘C:\TS\rummy_itc\Assets\..\z_package\debug\bunny_rummy_8-3-3-4_v1.0.1.20_20200427_153115\bunny rummy_Data\StreamingAssets\lua\logic\ui\pnl_activity\first_add_cash\first_add_cash_activity_preselected_item\ui_first_add_cash_activity_preselected_item_logic.lua’。

解决方案：

将上面报错的目标路径修改为路径较短的文件夹目录，问题解决。