QGraphicsScene 使用addItem添加10w个图元，耗时很长，需要50多秒，有什么解决方案优化添加的速度吗-CSDN社区
28 November 2024 admin
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首先得再确认下这10w个图元是否需要仍需要修改，如果不需要修改可以做一个item，或者pixmapitem添加到scene上，item是否可用polygon绘制，boundingrect用polygon的boundingrect 2. 若是后期仍需编辑某些个图元，那么这些item的boundingrect也需处理好，避免重绘，设置DeviceCoordinateCache，crash的原因很有可能是重绘导致的
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