rect = pg.Rect(0, 0, 200, 100)
rect.center = (300, 300)
while running:
for event in pg.event.get():
if event.type == QUIT:
running = False
# draw background
screen.blit(background_image, [0, 0])
# draw rectangle on top of the background
pg.draw.rect(screen, BLACK, rect)
# update display
pg.display.flip()
You have to update the display after drawing the rectangle:
rect = pg.Rect(0, 0, 200, 100)
rect.center = (300, 300)
while running:
for event in pg.event.get():
if event.type == QUIT:
running = False
# draw background
screen.blit(background_image, [0, 0])
# draw rectangle on top of the background
pg.draw.rect(screen, BLACK, rect)
# update display
pg.display.flip()
You are actually drawing on a Surface object. If you draw on the Surface associated to the PyGame display, this is not immediately visible in the display. The changes become visible, when the display is updated with either pygame.display.update() or pygame.display.flip().
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绘制矩形后，您必须更新显示：
您实际上是在
surface对象。如果您借鉴了与PyGame显示器关联的 surface ，则在显示屏中不立即可见。更改将可见，当显示显示使用 pygame.display.update（） 或pygame.display.flip（）。You have to update the display after drawing the rectangle:
You are actually drawing on a
Surfaceobject. If you draw on the Surface associated to the PyGame display, this is not immediately visible in the display. The changes become visible, when the display is updated with eitherpygame.display.update()orpygame.display.flip().