Question

是否有简单方式返回核对清单的值？

如进入菜单（如下），选择＆＃34; fast＆＃34;，＆＃34; lake＆＃34;和＆＃34; car＆＃34;，以便一切都在＆＃34; on＆＃34;。离开菜单，下次重新输入时，会恢复相同的选择吗？

#! /bin/bash
dialog          --checklist "package timing" 20 75 5 \
                        "tree" "4 MB" on \
                        "dog" "2 MB" on \
                        "fast" "5 MB" off \
                        "lake" "2 MB" off \
                        "car" "3 MB" off 2> ./tmp.$$

Answer 1

为了恢复选择，我们只需要从保存到的文件中读取它们（在您的示例tmp.$$中），然后在on的适当位置插入dialog命令。我们可以使用关联数组。

#! /bin/bash
declare -A status=([dog]=on [tree]=on)  # initialize "tree" and "dog" to be on
while
    dialog --checklist "package timing" 20 75 5 \
                       "tree" "4 MB" "${status[tree]}" \
                       "dog"  "2 MB" "${status[dog]}"  \
                       "fast" "5 MB" "${status[fast]}" \
                       "lake" "2 MB" "${status[lake]}" \
                       "car"  "3 MB" "${status[car]}"  2>tmp.$$
do  : whatever you want
    set -- $(<tmp.$$); set -- ${@/#/[}; set -- ${@/%/]=on}
    eval declare -A status=($@)
done
rm tmp.$$

离开菜单时如何恢复--checklist的“默认开/关”？

1 个答案: