Debugging a Draggable Flat List in React Native

TL;DR

• Faced issues with auto-scroll in a React Native draggable flat list.
• Discovered improper container wrapping resulted in wrong height calculations.
• Began using nested views with specific height settings to fix drag behavior.
• Planning to adjust component hierarchy for refined measurement calculations.

I’ve been grappling with a drag-and-drop issue in React Native, particularly with a draggable flat list. The challenge was that attempting to drag an item caused automatic upward scrolling without any thumb movement, preventing downward scrolling.

Steps Taken:

1. Identified the cause might be improper wrapping of the scroll container for draggable components.
2. Initially wrapped the entire screen content in the scroll container, leading to incorrect height calculations.
3. To fix this, wrapped only the draggable components directly without enclosing static content, which resolved some scroll issues.
4. Introduced a View with a height of 50% between the scroll container and the flat list, allowing for drag and scroll functionality within that constrained view.

This approach has provided insights and direction. Next, I’ll ensure no collapsible elements with a flex: 1 wrap around the draggable components and re-evaluate the nestable scroll container placement at the top level. Looking forward to seeing if these changes improve or completely solve the issues. Will update with further findings.