方法有三种，
方法有三种，
qt.conf
2. 放在可执行程序目录下
3. 设置系统变量QT_PLUGIN_PATH ,这里使用的是nsis打包工具，可参考“软件打包NSIS的使用，以及修改环境变量”
QT_PLUGIN_PATH ： E:\share\projects\src\bin\plugins ；这里是我的路径，使用时要改成实际的插件路径
以下是NSIS脚本示例代码：
; Script generated by the HM NIS Edit Script Wizard. !include "StrFunc.nsh" ; HM NIS Edit Wizard helper defines !define PRODUCT_NAME "Setup_Wintech" !define PRODUCT_VERSION "2.0" !define PRODUCT_PUBLISHER "Wintech Digital Systems Technology Corp." !define PRODUCT_WEB_SITE "http://www.wintechdigital.com" !define PRODUCT_DIR_REGKEY "Software\Microsoft\Windows\CurrentVersion\App Paths\makensis.exe" !define PRODUCT_UNINST_KEY "Software\Microsoft\Windows\CurrentVersion\Uninstall\${PRODUCT_NAME}" !define PRODUCT_UNINST_ROOT_KEY "HKLM" !define INSTALL_DIR_FILENAME "Wintech" ; MUI 1.67 compatible ------ !include "MUI.nsh" !include "LogicLib.nsh" !include "x64.nsh" !include "EnvVarUpdate.nsh" ; MUI Settings !define MUI_ABORTWARNING !define MUI_ICON "${NSISDIR}\Contrib\Graphics\Icons\Wintech.ico" !define MUI_UNICON "${NSISDIR}\Contrib\Graphics\Icons\Wintech.ico" ; Welcome page !insertmacro MUI_PAGE_WELCOME ; License page ;!insertmacro MUI_PAGE_LICENSE "${NSISDIR}\License.txt" ; Directory page !insertmacro MUI_PAGE_DIRECTORY ; Instfiles page !insertmacro MUI_PAGE_INSTFILES ; Finish page !define MUI_FINISHPAGE_RUN "$INSTDIR\bin\wlp_exe_gui.exe" !insertmacro MUI_PAGE_FINISH ; Uninstaller pages !insertmacro MUI_UNPAGE_INSTFILES ; Language files !insertmacro MUI_LANGUAGE "English" !echo "Testing" ; MUI end ------ RequestExecutionLevel admin Name "${PRODUCT_NAME} ${PRODUCT_VERSION}" OutFile "dlf_setup.exe" InstallDir "$PROGRAMFILES\${INSTALL_DIR_FILENAME}" InstallDirRegKey HKLM "${PRODUCT_DIR_REGKEY}" "" ShowInstDetails show ShowUnInstDetails show Section "MainSection" SEC01 ${EnvVarUpdate} $0 "PATH" "A" "HKLM" "$INSTDIR\bin" ; appends to the system path SetOutPath "$INSTDIR" SetOverwrite ifnewer File "${NSISDIR}\makensis.exe" CreateDirectory "$INSTDIR" CreateShortCut "$SMPROGRAMS\${INSTALL_DIR_FILENAME}\${INSTALL_DIR_FILENAME}.lnk" "$INSTDIR\makensis.exe" CreateShortCut "$DESKTOP\${INSTALL_DIR_FILENAME}.lnk" "$INSTDIR\makensis.exe" File "${NSISDIR}\License.txt" File /r "setup\*" ;Detect windows is 32bit or 64bit ${If} ${RunningX64} ; 64bit bits go here Exec '"$INSTDIR\bin\driver\win7\Psexec.exe" -i -d -s "$INSTDIR\bin\driver\win7\install_wdf_driver.exe"' ;-i -d -s "$INSTDIR\bin\Driver\win7install_wdf_driver.exe"' ;Exec "$INSTDIR\bin\notepad2.exe" ExecWait "$INSTDIR\bin\vs2010sp1vcredist.exe" ${Else} ; 32bit bits go here Exec '"$INSTDIR\bin\driver\win7\Psexec.exe" -i -d -s "$INSTDIR\bin\driver\win7\install_wdf_driver.exe"' ExecWait '"$INSTDIR\bin\vs2010sp1vcredist.exe"' ${EndIf} SectionEnd Section -AdditionalIcons WriteIniStr "$INSTDIR\${PRODUCT_NAME}.url" "InternetShortcut" "URL" "${PRODUCT_WEB_SITE}" CreateShortCut "$SMPROGRAMS\MyScript\Website.lnk" "$INSTDIR\${PRODUCT_NAME}.url" CreateShortCut "$SMPROGRAMS\MyScript\Uninstall.lnk" "$INSTDIR\uninst.exe" SectionEnd Section -Post WriteUninstaller "$INSTDIR\uninst.exe" WriteRegStr HKLM "${PRODUCT_DIR_REGKEY}" "" "$INSTDIR\makensis.exe" WriteRegStr ${PRODUCT_UNINST_ROOT_KEY} "${PRODUCT_UNINST_KEY}" "DisplayName" "$(^Name)" WriteRegStr ${PRODUCT_UNINST_ROOT_KEY} "${PRODUCT_UNINST_KEY}" "UninstallString" "$INSTDIR\uninst.exe" WriteRegStr ${PRODUCT_UNINST_ROOT_KEY} "${PRODUCT_UNINST_KEY}" "DisplayIcon" "$INSTDIR\makensis.exe" WriteRegStr ${PRODUCT_UNINST_ROOT_KEY} "${PRODUCT_UNINST_KEY}" "DisplayVersion" "${PRODUCT_VERSION}" WriteRegStr ${PRODUCT_UNINST_ROOT_KEY} "${PRODUCT_UNINST_KEY}" "URLInfoAbout" "${PRODUCT_WEB_SITE}" WriteRegStr ${PRODUCT_UNINST_ROOT_KEY} "${PRODUCT_UNINST_KEY}" "Publisher" "${PRODUCT_PUBLISHER}" SectionEnd Function un.onUninstSuccess HideWindow MessageBox MB_ICONINFORMATION|MB_OK "$(^Name) 已成功地从你的计算机移除。" FunctionEnd Function un.onInit MessageBox MB_ICONQUESTION|MB_YESNO|MB_DEFBUTTON2 "你确实要完全移除 $(^Name) ，其及所有的组件？" IDYES +2 Abort FunctionEnd Section Uninstall Delete "$INSTDIR\${PRODUCT_NAME}.url" Delete "$INSTDIR\uninst.exe" Delete "$INSTDIR\setup" Delete "$INSTDIR\License.txt" Delete "$INSTDIR\makensis.exe" Delete "$SMPROGRAMS\${INSTALL_DIR_FILENAME}\Uninstall.lnk" Delete "$SMPROGRAMS\${INSTALL_DIR_FILENAME}\Website.lnk" Delete "$DESKTOP\${INSTALL_DIR_FILENAME}.lnk" Delete "$SMPROGRAMS\${INSTALL_DIR_FILENAME}\${INSTALL_DIR_FILENAME}.lnk" RMDir "$SMPROGRAMS\${INSTALL_DIR_FILENAME}" RMDir "$INSTDIR" DeleteRegKey ${PRODUCT_UNINST_ROOT_KEY} "${PRODUCT_UNINST_KEY}" DeleteRegKey HKLM "${PRODUCT_DIR_REGKEY}" SetAutoClose true SectionEnd以下时EnvVarUpdate.nsh的代码，需要拷贝到NSIS的include路径下面才能用：
/** * EnvVarUpdate.nsh * : Environmental Variables: append, prepend, and remove entries * * WARNING: If you use StrFunc.nsh header then include it before this file * with all required definitions. This is to avoid conflicts * * Usage: * ${EnvVarUpdate} "ResultVar" "EnvVarName" "Action" "RegLoc" "PathString" * * Credits: * Version 1.0 * * Cal Turney (turnec2) * * Amir Szekely (KiCHiK) and e-circ for developing the forerunners of this * function: AddToPath, un.RemoveFromPath, AddToEnvVar, un.RemoveFromEnvVar, * WriteEnvStr, and un.DeleteEnvStr * * Diego Pedroso (deguix) for StrTok * * Kevin English (kenglish_hi) for StrContains * * Hendri Adriaens (Smile2Me), Diego Pedroso (deguix), and Dan Fuhry * (dandaman32) for StrReplace * * Version 1.1 (compatibility with StrFunc.nsh) * * techtonik * * http://nsis.sourceforge.net/Environmental_Variables:_append%2C_prepend%2C_and_remove_entries * */ !ifndef ENVVARUPDATE_FUNCTION !define ENVVARUPDATE_FUNCTION !verbose push !verbose 3 !include "LogicLib.nsh" !include "WinMessages.NSH" !include "StrFunc.nsh" ; ---- Fix for conflict if StrFunc.nsh is already includes in main file ----------------------- !macro _IncludeStrFunction StrFuncName !ifndef ${StrFuncName}_INCLUDED ${${StrFuncName}} !endif !ifndef Un${StrFuncName}_INCLUDED ${Un${StrFuncName}} !endif !define un.${StrFuncName} "${Un${StrFuncName}}" !macroend !insertmacro _IncludeStrFunction StrTok !insertmacro _IncludeStrFunction StrStr !insertmacro _IncludeStrFunction StrRep ; ---------------------------------- Macro Definitions ---------------------------------------- !macro _EnvVarUpdateConstructor ResultVar EnvVarName Action Regloc PathString Push "${EnvVarName}" Push "${Action}" Push "${RegLoc}" Push "${PathString}" Call EnvVarUpdate Pop "${ResultVar}" !macroend !define EnvVarUpdate '!insertmacro "_EnvVarUpdateConstructor"' !macro _unEnvVarUpdateConstructor ResultVar EnvVarName Action Regloc PathString Push "${EnvVarName}" Push "${Action}" Push "${RegLoc}" Push "${PathString}" Call un.EnvVarUpdate Pop "${ResultVar}" !macroend !define un.EnvVarUpdate '!insertmacro "_unEnvVarUpdateConstructor"' ; ---------------------------------- Macro Definitions end------------------------------------- ;----------------------------------- EnvVarUpdate start---------------------------------------- !define hklm_all_users 'HKLM "SYSTEM\CurrentControlSet\Control\Session Manager\Environment"' !define hkcu_current_user 'HKCU "Environment"' !macro EnvVarUpdate UN Function ${UN}EnvVarUpdate Push $0 Exch 4 Exch $1 Exch 3 Exch $2 Exch 2 Exch $3 Exch Exch $4 Push $5 Push $6 Push $7 Push $8 Push $9 Push $R0 /* After this point: ------------------------- $0 = ResultVar (returned) $1 = EnvVarName (input) $2 = Action (input) $3 = RegLoc (input) $4 = PathString (input) $5 = Orig EnvVar (read from registry) $6 = Len of $0 (temp) $7 = tempstr1 (temp) $8 = Entry counter (temp) $9 = tempstr2 (temp) $R0 = tempChar (temp) */ ; Step 1: Read contents of EnvVarName from RegLoc ; ; Check for empty EnvVarName ${If} $1 == "" SetErrors DetailPrint "ERROR: EnvVarName is blank" Goto EnvVarUpdate_Restore_Vars ${EndIf} ; Check for valid Action ${If} $2 != "A" ${AndIf} $2 != "P" ${AndIf} $2 != "R" SetErrors DetailPrint "ERROR: Invalid Action - must be A, P, or R" Goto EnvVarUpdate_Restore_Vars ${EndIf} ${If} $3 == HKLM ReadRegStr $5 ${hklm_all_users} $1 ; Get EnvVarName from all users into $5 ${ElseIf} $3 == HKCU ReadRegStr $5 ${hkcu_current_user} $1 ; Read EnvVarName from current user into $5 ${Else} SetErrors DetailPrint 'ERROR: Action is [$3] but must be "HKLM" or HKCU"' Goto EnvVarUpdate_Restore_Vars ${EndIf} ; Check for empty PathString ${If} $4 == "" SetErrors DetailPrint "ERROR: PathString is blank" Goto EnvVarUpdate_Restore_Vars ${EndIf} ; Make sure we've got some work to do ${If} $5 == "" ${AndIf} $2 == "R" SetErrors DetailPrint "$1 is empty - Nothing to remove" Goto EnvVarUpdate_Restore_Vars ${EndIf} ; Step 2: Scrub EnvVar ; StrCpy $0 $5 ; Copy the contents to $0 ; Remove spaces around semicolons (NOTE: spaces before the 1st entry or ; after the last one are not removed here but instead in Step 3) ${If} $0 != "" ; If EnvVar is not empty ... ${Do} ${${UN}StrStr} $7 $0 " ;" ${If} $7 == "" ${ExitDo} ${EndIf} ${${UN}StrRep} $0 $0 " ;" ";" ; Remove '<space>;' ${Loop} ${Do} ${${UN}StrStr} $7 $0 "; " ${If} $7 == "" ${ExitDo} ${EndIf} ${${UN}StrRep} $0 $0 "; " ";" ; Remove ';<space>' ${Loop} ${Do} ${${UN}StrStr} $7 $0 ";;" ${If} $7 == "" ${ExitDo} ${EndIf} ${${UN}StrRep} $0 $0 ";;" ";" ${Loop} ; Remove a leading or trailing semicolon from EnvVar StrCpy $7 $0 1 0 ${If} $7 == ";" StrCpy $0 $0 "" 1 ; Change ';<EnvVar>' to '<EnvVar>' ${EndIf} StrLen $6 $0 IntOp $6 $6 - 1 StrCpy $7 $0 1 $6 ${If} $7 == ";" StrCpy $0 $0 $6 ; Change ';<EnvVar>' to '<EnvVar>' ${EndIf} ; DetailPrint "Scrubbed $1: [$0]" ; Uncomment to debug ${EndIf} /* Step 3. Remove all instances of the target path/string (even if "A" or "P") $6 = bool flag (1 = found and removed PathString) $7 = a string (e.g. path) delimited by semicolon(s) $8 = entry counter starting at 0 $9 = copy of $0 $R0 = tempChar */ ${If} $5 != "" ; If EnvVar is not empty ... StrCpy $9 $0 StrCpy $0 "" StrCpy $8 0 StrCpy $6 0 ${Do} ${${UN}StrTok} $7 $9 ";" $8 "0" ; $7 = next entry, $8 = entry counter ${If} $7 == "" ; If we've run out of entries, ${ExitDo} ; were done ${EndIf} ; ; Remove leading and trailing spaces from this entry (critical step for Action=Remove) ${Do} StrCpy $R0 $7 1 ${If} $R0 != " " ${ExitDo} ${EndIf} StrCpy $7 $7 "" 1 ; Remove leading space ${Loop} ${Do} StrCpy $R0 $7 1 -1 ${If} $R0 != " " ${ExitDo} ${EndIf} StrCpy $7 $7 -1 ; Remove trailing space ${Loop} ${If} $7 == $4 ; If string matches, remove it by not appending it StrCpy $6 1 ; Set 'found' flag ${ElseIf} $7 != $4 ; If string does NOT match ${AndIf} $0 == "" ; and the 1st string being added to $0, StrCpy $0 $7 ; copy it to $0 without a prepended semicolon ${ElseIf} $7 != $4 ; If string does NOT match ${AndIf} $0 != "" ; and this is NOT the 1st string to be added to $0, StrCpy $0 $0;$7 ; append path to $0 with a prepended semicolon ${EndIf} ; IntOp $8 $8 + 1 ; Bump counter ${Loop} ; Check for duplicates until we run out of paths ${EndIf} ; Step 4: Perform the requested Action ; ${If} $2 != "R" ; If Append or Prepend ${If} $6 == 1 ; And if we found the target DetailPrint "目标路径已经在$1中存在. 目标路径将被删除并" ${EndIf} ${If} $0 == "" ; If EnvVar is (now) empty StrCpy $0 $4 ; just copy PathString to EnvVar ${If} $6 == 0 ; If found flag is either 0 ${OrIf} $6 == "" ; or blank (if EnvVarName is empty) DetailPrint "$1 was empty and has been updated with the target" ${EndIf} ${ElseIf} $2 == "A" ; If Append (and EnvVar is not empty), StrCpy $0 $0;$4 ; append PathString ${If} $6 == 1 DetailPrint "添加到 $1末尾" ${Else} DetailPrint "路径已经添加到 $1" ${EndIf} ${Else} ; If Prepend (and EnvVar is not empty), StrCpy $0 $4;$0 ; prepend PathString ${If} $6 == 1 DetailPrint "添加到 $1前面" ${Else} DetailPrint "路径已经添加到 $1" ${EndIf} ${EndIf} ${Else} ; If Action = Remove ${If} $6 == 1 ; and we found the target DetailPrint "目标路径从 $1中删除" ${Else} DetailPrint "目标路径不在 $1中 (不需要删除)" ${EndIf} ${If} $0 == "" DetailPrint "$1 是空的" ${EndIf} ${EndIf} ; Step 5: Update the registry at RegLoc with the updated EnvVar and announce the change ; ClearErrors ${If} $3 == HKLM WriteRegExpandStr ${hklm_all_users} $1 $0 ; Write it in all users section ${ElseIf} $3 == HKCU WriteRegExpandStr ${hkcu_current_user} $1 $0 ; Write it to current user section ${EndIf} IfErrors 0 +4 MessageBox MB_OK|MB_ICONEXCLAMATION "Could not write updated $1 to $3" DetailPrint "Could not write updated $1 to $3" Goto EnvVarUpdate_Restore_Vars ; "Export" our change SendMessage ${HWND_BROADCAST} ${WM_WININICHANGE} 0 "STR:Environment" /TIMEOUT=5000 EnvVarUpdate_Restore_Vars: ; ; Restore the user's variables and return ResultVar Pop $R0 Pop $9 Pop $8 Pop $7 Pop $6 Pop $5 Pop $4 Pop $3 Pop $2 Pop $1 Push $0 ; Push my $0 (ResultVar) Exch Pop $0 ; Restore his $0 FunctionEnd !macroend ; EnvVarUpdate UN !insertmacro EnvVarUpdate "" !insertmacro EnvVarUpdate "un." ;----------------------------------- EnvVarUpdate end---------------------------------------- !verbose pop !endifReferences：
http://stackoverflow.com/questions/11272066/nsis-how-to-set-an-environment-variable-in-system-variable
http://nsis.sourceforge.net/Path_Manipulation
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