AppleScript中的名称扩展名不起作用

Question

我正在尝试显示我选择的文件的扩展名。我做错了什么？

    set theFile to (choose file with prompt "Select a file to transfer:")
    set ext to name extension of theFile
    display dialog ext as text

Answer 1

尝试：

tell application "System Events" to set ext to name extension of theFile

Answer 2

告诉应用程序“Finder”     设置文件选择文件{}     将ext设置为theFile的扩展名     显示对话框“la extenxion es”＆amp; EXT 结束告诉