autohotkey - 全局变量没有全局作用域

Question

supposedlyGlobalVariable := "blah"

ARoutine()
{
   localVariable := "asdf"
   MsgBox, The global variable value is %supposedlyGlobalVariable%.  The local variable value is %localVariable%.
}


^!X:: ;This assigns the hotkey CTRL + ALT + X to run the routine
ARoutine()
return

运行代码，结果为:

"The global variable value is .  The local variable value is asdf."

documentation状态:

Variable scope and declarations: With the exception of local variables in functions, all variables are global; that is, their contents may be read or altered by any part of the script.

为什么我的全局变量在函数内没有作用域？

Answer 1

全局变量的文档可以在这里找到:
https://autohotkey.com/docs/Functions.htm#Global

Global variables

To refer to an existing global variable inside a function (or create a new one), declare the variable as global prior to using it. For example:

LogToFile(TextToLog)
{
    global LogFileName
    FileAppend, %TextToLog%`n, %LogFileName%
}

我相信 AHK 的 global 概念与其他语言有点不同。使用 AHK，您可以创建一个变量并在多个热键和子程序中使用它，而无需将其声明为全局变量。

Gv := 0

f1::SetTimer, Action, % (on:=!on) ? (1000) : ("Off")

Action:
    Gv++
    trayTip,, % Gv
Return

f2::Msgbox, % Gv

代码说明:

F1 键切换计时器以运行子程序:Action每1000多发性硬化症。

%开始一个表达式。

on:=!on反转变量 on 的二进制值每次按F1。

?:统称为三元运算符。

当 on=1 延迟设置为 1000多发性硬化症;当 on=0 时，计时器开启 Off .

++运算符将变量 Gv 加 1。