You might just want to use the non-committal infinite scrolling busyindicator while you perform the query.
你可能只想当你执行查询使用非承诺无限滚动的忙闲指示器。
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With RRAFS, we can also create two Image VPs — one for the busyindicator and another with an empty content — as shown in Figures 19 and 20, respectively.
However, how to run both the initialization and the display of busyindicator simultaneously? It seems that I need different threads to handle this issue.