uniapp folding box secondary loop

uni-collapse

I stepped on some pits with collapse when I made a WeChat applet

Use secondary loop directly

each foldThe same item appears in all boxes

Solutions tried

Import subcomponent, pass value

but the child component does not render

Determine whether it is selected and update the secondary list

This solution can show which one is displayed
But because my secondary list data comes from http request
The asynchronous request will cause the secondary list to be rendered before it is updated

Select when judging and add a secondary list

Add data to the second-level list when requesting data
Use a two-dimensional array and locate it according to the incoming first-level list index
This solution can solve the problem
The source code will be posted later