Question

此问题与AppleScript set directory path in Finder类似，但的答案对我不起作用！

local destination, libraryName, f
set destination to "/Users/bryandunphy/Music/Result"
set libraryName to "Testing"
if not ((libraryName ends with ".xml") or (libraryName ends with ".XML")) then set libraryName to libraryName & ".xml"
menuClick({"iTunes", "File", "Library", "Export Library…"})
set f to "/Users/bryandunphy/Music/Result/Testing.xml" -- (destination & "/" & libraryName) as string
tell application "Finder"
    if POSIX file f exists then
        delete f
        beep
    end if
end tell
tell application "System Events" to tell process "iTunes" to tell its front window to set the value of its text field "Save As:" to libraryName
if switchDir(destination, "iTunes", true, true) then return destination & "/" & libraryName -- first true = click default (Save) button, last = create path if needed

＆＃34; if switchDir＆＃34; line导致＆＃34;文件存在，替换？＆＃34;对话框出现。

Answer 1

通过将答案与其他两个“相关”问题相结合，找到答案！

“tell block”应替换为

if f begins with "~" then tell application "System Events" to set f to ((home directory of current user) & items 2 through -1 of (get f))
tell application "System Events" to if exists disk item (POSIX file f as string) then delete disk item (POSIX file f as string)

Answer 2

最简单的解决方案是在alias上下文中使用"System Events"个对象：

set f to "/Users/bryandunphy/Music/Result/Testing.xml" # sample POSIX path
tell alias f of application "System Events"
    if it exists then delete it
end tell

警告：这会立即删除目标文件，而不是将其移动到垃圾文件夹。
要执行后者，请参阅下面基于Finder的解决方案。

在"System Events"上下文中，alias个对象可以直接使用POSIX路径，也可以执行文件操作。

出于性能原因，在"System Events"上下文而不是"Finder"上下文中工作通常是首选，但请注意，某些操作不仅可以在"Finder"上下文中使用 - 将文件移动到垃圾而不是立即删除它就是一个例子。

至于为什么"Finder" - 上下文方法不起作用：

AppleScript的方式很神秘：POSIX file f exists 不工作 - 它不会检测文件的存在 - 但f as POSIX file exists会这样做：

set f to "/Users/bryandunphy/Music/Result/Testing.xml" # sample POSIX path
tell application "Finder"
    if f as POSIX file exists then delete f as POSIX file
end tell

^{另一个怪癖：tell f as POSIX file ... end tell块中包含if it exists then delete it - 类似于上面的"System Events"解决方案 - 不工作。}

与顶部的"System Events"解决方案不同，这是：

将文件移至垃圾，而不是立即删除，
- 会导致系统声音将某些东西移到垃圾桶中发声。
返回刚搬到垃圾箱的file对象（已在新位置，垃圾箱文件夹中）。

在Applescript中，为什么我的＆＃34; Tell app Finder＆＃34;阻止不删除＆＃34; f＆＃34;即使它存在？

2 个答案: