我正在编写一个脚本来控制学校戏剧的 iTunes。问题是我无法让它通过 if 语句。它确实设置了变量selectedOption，但是一旦它使 ifs 和 else ifs 变热，它似乎只是跳过了它们。
--repeat
activate
set myOption to {"Start Play", "Scene 1", "Between Scenes", "Scene 2", "Next Song", "End Play"}
set selectedOption to {choose from list myOption}
---------End Play---------
if selectedOption is "End Play" then
tell application "iTunes"
set currentvolume to the sound volume
if (player state is playing) then
-- if so, fade out the current track
repeat with i from currentvolume to 0 by -2
set the sound volume to i
delay 0.1
end repeat
stop
end if
end tell
display dialog "Volume Back Up?" buttons {"Full", "80", "End"} default button "Full"
if the selectedOption is "Full" then
tell application "iTunes"
set sound volume to 100
end tell
else if the selectedOption is "80" then
tell application "iTunes"
set sound volume to 80
end tell
end if
exit repeat
---------Scene 1---------
else if the selectedOption is "Scene 1" then
tell application "iTunes"
-- get the initial volume
set currentvolume to the 60
-- are we playing?
if (player state is playing) then
-- if so, fade out the current track
repeat with i from currentvolume to 0 by -2
set the sound volume to i
delay 0.02
end repeat
next track
end if
-- now, regardless of whether we were playing or not, fade in the next track
set the sound volume to 0
play playlist "2012 Play Christmas"
repeat with j from 0 to currentvolume by 2
set the sound volume to j
delay 0.02
end repeat
--do shell script "open ~/Desktop/2.app"
exit repeat
end tell
---------Between Scenes---------
else if the selectedOption is "Between Scenes" then
tell application "iTunes"
-- get the initial volume
set currentvolume to the 60
-- are we playing?
if (player state is playing) then
-- if so, fade out the current track
repeat with i from currentvolume to 0 by -2
set the sound volume to i
delay 0.02
end repeat
next track
end if
-- now, regardless of whether we were playing or not, fade in the next track
set the sound volume to 0
play playlist "2012 Play Intermission"
repeat with j from 0 to currentvolume by 2
set the sound volume to j
delay 0.02
end repeat
end tell
---------Scene 2---------
else if the selectedOption is "Scene 2" then
tell application "iTunes"
-- get the initial volume
set currentvolume to the 60
-- are we playing?
if (player state is playing) then
-- if so, fade out the current track
repeat with i from currentvolume to 0 by -2
set the sound volume to i
delay 0.02
end repeat
next track
end if
-- now, regardless of whether we were playing or not, fade in the next track
set the sound volume to 0
play playlist "2012 Play Christmas2"
repeat with j from 0 to currentvolume by 2
set the sound volume to j
delay 0.02
end repeat
end tell
---------Next Song---------
else if the selectedOption is "Next Song" then
tell application "iTunes"
-- get the initial volume
set currentvolume to the 60
-- are we playing?
if (player state is playing) then
-- if so, fade out the current track
repeat with i from currentvolume to 0 by -2
set the sound volume to i
delay 0.02
end repeat
next track
end if
-- now, regardless of whether we were playing or not, fade in the next track
set the sound volume to 0
play
repeat with j from 0 to currentvolume by 2
set the sound volume to j
delay 0.02
end repeat
end tell
---------Begin Play---------
else if the selectedOption is "Begin Play" then
tell application "iTunes"
set sound volume to 100
play playlist "2012 Play Intro"
end tell
end if
--end repeat
我注释掉了重复，直到我可以让它选择正确的语句。