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[微信] 怎么微信小程序虚拟列表快速滚动时出现白屏现象

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原因:计算可视区域的节点和渲染 没有滚动快 一个很暴力的方法,就是足够大的缓冲区,但缓冲区都足够大,那感觉虚拟列表也没啥用了。

目前实现的思路 滚动记录 scrollTop -> 触发 useMemo 计算 startIndex 和 endIndex ,然后渲染指定区间的视图。 调试发现的原因就是 scrollTop 频繁触发,但 useMemo 减少了执行次数,导致可能都已经滚动一段距离还没有触发一次渲染,出现白屏现象。

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