labelImg闪退问题深度解析

环境：Ubuntu16.04，python3.10

使用pip安装的labelImg点击绘制会发生闪退并报错：

Traceback (most recent call last):
  File "/python3.10/site-packages/libs/canvas.py", line 530, in paintEvent
    p.drawLine(self.prev_point.x(), 0, self.prev_point.x(), self.pixmap.height())
TypeError: arguments did not match any overloaded call:
  drawLine(self, l: QLineF): argument 1 has unexpected type 'float'
  drawLine(self, line: QLine): argument 1 has unexpected type 'float'
  drawLine(self, x1: int, y1: int, x2: int, y2: int): argument 1 has unexpected type 'float'
  drawLine(self, p1: QPoint, p2: QPoint): argument 1 has unexpected type 'float'
  drawLine(self, p1: Union[QPointF, QPoint], p2: Union[QPointF, QPoint]): argument 1 has unexpected type 'float'
已放弃 (核心已转储)

原因：python3.8之后绘图函数不允许有非整数。

解决

1.打开报错提示的canvas.py文件

1.1 修改526行：

 p.drawRect(left_top.x(), left_top.y(), rect_width, rect_height)

        修改为：

 p.drawRect(int(left_top.x()),int(left_top.y()), int(rect_width), int(rect_height))

 1.2  530行：

p.drawLine(self.prev_point.x(), 0, self.prev_point.x(), self.pixmap.height())

        修改为:

p.drawLine(int(self.prev_point.x()), 0, int(self.prev_point.x()), int(self.pixmap.height()))

1.3 531行：

 p.drawLine(0, self.prev_point.y(),self.pixmap.width(), self.prev_point.y())

        修改为

 p.drawLine(0, int(self.prev_point.y()),int( self.pixmap.width()), int(self.prev_point.y()))

2.修改python3.10/site-packages/labelImg/labelImg.py

        第950行

bar.setValue(bar.value() + bar.singleStep() * units)

        修改为

 bar.setValue(int(bar.value() + bar.singleStep() * units))

作者：code_crusher