QPaintDevice: Cannot destroy paint device that is being painted

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cszlg 2013-10-07 10:30 原文

在paintEvent中，使用QPainter * 绘制图像出现此问题。解决：

1、改为不使用QPainter指针。

2、添上begin(), end()

QPainter * painter = new QPainter();
painter->begin (this);//!!!
painter->drawLine (...);
painter->end ();//!!!