步骤完成后，Applescript进度条粘贴

Question

以下示例效果很好，但是在达到所有步骤后，进度对话框在显示的下一个对话框后面保持可见。这是预期的行为吗？如果是这样的话，有没有在完成后隐藏它？

set progress description to "A simple progress indicator"
set progress additional description to "Preparing…"
set progress total steps to -1

delay 5

set progress total steps to 100
repeat with i from 1 to 100
    try
        set progress additional description to "I am on step " & i
        set progress completed steps to i
        delay 0.2
    on error thisErr
        display alert thisErr
        exit repeat
    end try
end repeat