nsis中的复合字符串比较

Question

如何在NSIS中进行复合字符串比较？

基本上类似于：if ( str1 == "" || str2 == "" ) ...

strcpy $1 "c:\foo"
strcpy $2 "d:\bar"

${if} strcmp $1 ""
${orif} strcmp $2 ""
   MessageBox MB_OK "one or both are empty"
${else}
   messagebox mb_ok "both are not"
${endif}
SectionEnd

Answer 1

StrCmp是NSIS字符串比较核心的低级指令，但在使用LogicLib时，您必须使用正确的运算符：==，!=，S==或S!=（所有这些都列在LogicLib.nsh的顶部，不区分大小写的运算符在内部使用StrCmp）

!include LogicLib.nsh
Section
StrCpy $1 "c:\foo"
StrCpy $2 "d:\bar"

${If} $1 == ""
${OrIf} $2 == ""
   MessageBox MB_OK "one or both are empty"
${Else}
   MessageBox MB_OK "both are not"
${EndIf}
SectionEnd