擅长:python、mysql、java
<p>您必须更改QGraphicsView的背景色,例如使用QPalette:</p>
<pre><code>import sys
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QPalette
from PyQt5.QtWidgets import QApplication, QGraphicsView, QGraphicsScene
class GraphicsWindow(QGraphicsView):
def __init__(self, parent=None):
super(GraphicsWindow, self).__init__(parent)
scene = QGraphicsScene(self)
self.setScene(scene)
self.setBackgroundBrush(Qt.black)
pal = self.palette()
pal.setColor(QPalette.Window, Qt.black)
self.setPalette(pal)
def main():
app = QApplication(sys.argv)
graphics_window = GraphicsWindow()
graphics_window.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
</code></pre>