Javascript 如何在提示用户使用AppleScript从列表中选择后在数组中查找位置

我不能完全理解这一点，我刚刚开始编写脚本。为了解释，我想使用下面的代码允许用户从列表中选择一个项目。然后，我想将他们选择的内容转换为列表中的数字位置

例如，如果用户选择了iPod，我希望它将其输入保存为2，而不是iPod

以下是我所拥有的：

set productList to {"iPad", "iPod", "iPhone", "Mac", "Apple TV", "Apple Watch", "Beats", "Apple Watch Edition", "Apple Watch Hermes"}
set yourProduct to choose from list of productList with prompt "Select your product: "

on listPosition(this_item, this_list)
    repeat with i from 1 to the count of this_list
        if item i of this_list is this_item then return i
    end repeat
    return 0
end listPosition

set item_num to my listPosition(yourProduct, productList)

---

这对我使用最新版本的Sierra很有用

这将把“位置”存储在变量

属性itEmposition

property productList : {"iPad", "iPod", "iPhone", "Mac", "Apple TV", "Apple Watch", "Beats", "Apple Watch Edition", "Apple Watch Hermes"}
property theItemPosition : missing value

set yourProduct to choose from list of productList with prompt "Select your product: "
set yourProduct to yourProduct as string

findPosition(productList, yourProduct)

set theItemPosition to item 1 of result -- returns the chosen product to its position 

on findPosition(theList, theListProductChosen)
    local theList, theListProductChosen, res
    try
        if theList's class is not list then error "not a list." number -1704
        if {theListProductChosen} is not in theList then return {}
        set res to {}
        script k
            property l : theList
        end script
        repeat with i from 1 to count of k's l
            if k's l's item i is theListProductChosen then set res's end to i
        end repeat
        return res
    on error eMsg number eNum
        error "Can't findPosition: " & eMsg number eNum
    end try
end findPosition

---

你很接近。您只需添加一条语句：

将产品设置为产品的第1项

set productList to {"iPad", "iPod", "iPhone", "Mac", "Apple TV", "Apple Watch", "Beats", "Apple Watch Edition", "Apple Watch Hermes"}
set yourProduct to choose from list of productList with prompt "Select your product: "

--- ADD This Line to Get Product from Returned List ---
set yourProduct to item 1 of yourProduct

on listPosition(this_item, this_list)
  repeat with i from 1 to the count of this_list
    if item i of this_list is this_item then return i
  end repeat
  return 0
end listPosition

set item_num to my listPosition(yourProduct, productList)

choose from list

命令返回所选项目的列表。因此，在进行比较之前，必须从列表中获取项目

---

有关更多信息，请参见

，在发布此答案时，其他答案会返回列表中所选项目的位置，但它们不会考虑使用

从列表中选择

命令以编码方式进行的两种选择。如图所示，修复当前代码只需执行以下操作：

更改：

set yourProduct to choose from list of productList with prompt "Select your product: "

致：

这样做的目的是处理用户按下取消按钮，或者将

yourProduct

的值设置为字符串，而不是列表，因为如果未按下取消，则从

选择列表

命令返回的值。然后您的

on-listPosition（这个项目，这个列表）

处理程序将在这个特定用例中正常工作

请注意，编写代码的方法通常不止一种，但通常最好使用KISS原则，尤其是当一个人第一次学习如何编写代码时

try
    set yourProduct to item 1 of (choose from list of productList with prompt "Select your product:")
on error
    return
end try