NSIS IfFileExists - 不止一行

Question

我正在使用 IfFileExists 函数，但我认为它只包含跳转后的第一行。我怎样才能做一些类似于 C 的事情，比如 {..../.../....}？!

IfFileExists "$PROGRAMFILES\InduSoft Web Studio v7.0\Bin\RunStartUp.exe" StartUpExists PastStartUpExists
      StartUpExists:
        StrCpy $Text "$PROGRAMFILES\InduSoft Web Studio v7.0\Bin\RunStartUp.exe"

      PastStartUpExists:
        nsDialogs::Create 1018
        Pop $Dialog

        nsDialogs::SelectFileDialog open "$PROGRAMFILES\InduSoft Web Studio v7.0\Bin\RunStartUp.exe" "*.exe"

        Pop $Text

        ${NSD_CreateText} 0 13u 100% -13u $Text
        Pop $Text

        ${NSD_CreateText} 0
        ${NSD_GetText} $Text $0

        CreateShortCut "$SMPROGRAMS\Advanlab\Website.lnk" "$INSTDIR\${PRODUCT_NAME}.url"
        CreateShortCut "$SMPROGRAMS\Advanlab\Uninstall.lnk" "$INSTDIR\uninst.exe"
        CreateShortCut "$SMPROGRAMS\Advanlab\Advanlab.lnk" "$0"
        CreateShortCut "$DESKTOP\Advanlab.lnk" "$0"

Answer 1

IfFileExists 的语法是

IfFileExists file_to_check offset_or_label_if_exists [offset_or_label_if_not_exists]

如果您计划执行一个块或另一个块，请不要忘记跳过第二个块。

因此，一个简单的情况是:

IfFileExists "$INSTDIR\file.txt" file_found file_not_found
file_found:
StrCpy $0 "the file was found"
goto end_of_test ;<== important for not continuing on the else branch
file_not_found:
StrCpy $0 "the file was NOT found"
end_of_test:

如果块之一就在 IfFileExists 之后您可以使用 0 偏移量而不是无用的标签:

IfFileExists "$INSTDIR\file.txt" 0 file_not_found
StrCpy $0 "the file was found"
goto end_of_test ;<== important for not continuing on the else branch
file_not_found:
StrCpy $0 "the file was NOT found"
end_of_test: