AppleScript 库不会在每次加载时都计算属性

Question

假设有两个脚本，first.scpt

do shell script "echo first > /tmp/shared_info.txt"
property lib : script "MyLibrary"
lib's display_shared_info()

和second.scpt

do shell script "echo second > /tmp/shared_info.txt"
property lib : script "MyLibrary"
lib's display_shared_info()

图书馆有以下代码：

property shared_info : read file (POSIX file "/tmp/shared_info.txt")
on display_shared_info()
   display notification shared_info
end display_shared_info

我的推理是，当运行first.scpt然后second.scpt时，它会先显示"first"然后"second"，因为每个脚本首先覆盖 shared_info.txt 然后调用库来显示它的内容。

但是，库似乎不会在每次将 shared_info 属性加载到脚本中时对其求值？

我想要完成的是库每次加载到脚本中时都会初始化其属性。

Answer 1

AppleScript 属性在编译时计算。要在运行时设置它，请将代码放入处理程序

property shared_info : ""

on display_shared_info()
    set shared_info to read "/tmp/shared_info.txt" -- works also with POSIX path
    display notification shared_info
end display_shared_info

调用处理程序使用

do shell script "echo first > /tmp/shared_info.txt"
tell script "MyLibrary" to display_shared_info()

AppleScript 库不会在每次加载时都计算属性

AppleScript library doesn't evaluate property every time it's loaded

applescript

AppleScript 库不会在每次加载时都计算 属性

AppleScript library doesn't evaluate property every time it's loaded

applescript

AppleScript 库不会在每次加载时都计算属性