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"新帖"列表懒加载bug #52

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YunzheZJU opened this issue Jul 9, 2020 · 0 comments

YunzheZJU commented Jul 9, 2020

"新帖"页主题列表存在bug。

环境

MacOS 10.15.5
Chrome 83.0.4103.116 64bit

复现步骤

新建标签页A，打开/newTopics，用于复现bug
新建标签页B，打开/newTopics，用于同步”新帖“内容
每隔1分钟刷新标签页B，直到出现n个新帖
激活标签页A，快速滚动列表至底部数次（约10次）
此时Spinner"正在加载"将持续显示于视口，无网络请求发出
缓慢上下滚动列表数次，发现每次滚动都会触发1次UtilgetAllNewTopic 调用及其衍生请求，但列表内容无更新
改变n的值，或每隔数分钟令标签页A加载一次新帖，再滚动至底部，将触发更多神奇现象。最差的情况会出现列表无限循环加载

可能的问题源

这个if Guard完全没有考虑现实中newTopic会更新的情况。一旦在加载完所有新帖前，后端收到1个新帖，getAllNewTopic就迟早会拿回来重复的主题内容，this.state.from就永远不可能达到预想的上限值。

可能的解决方案

getAllNewTopic 此Util的from参数类型修改为主题帖id

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