PyQt5程序报错：QPaintDevice: Cannot destroy paint device that is being painted/Process finished with exit code -1073740791 (0xC0000409)

QPainter

QPainter类在QWidget (控件)上执行绘图操作，它是一个绘制工具，为大部分图形界面提供了高度优化的函数，使QPainter类可以绘制从简单的直线到复杂的饼图等。

绘制操作在QWidget.paintEvent()中完成。绘制方法必须放在QtGui.QPainter对象的begin()和end()之间。QPainter类在控件或其他绘图设备上执行较低级别的图形绘制功能,并通过如表4-27所示的方法进行绘制。

 

2021-09-07 Tuesday 调试程序PyQt5/Chapter04/qt04_painter.py时，程序报错：

QPaintDevice: Cannot destroy paint device that is being painted

Process finished with exit code -1073740791 (0xC0000409) 

错误原因：

未严格执行“绘制方法必须放在QtGui.QPainter对象的begin()和end()之间。”

修改程序：

# 打印

painter.begin(self)

painter.drawImage(0, 0, self.image)

painter.end()

一切OK!