在我的破砖游戏中，当球碰到桨时为什么不改变速度？

Question

我正在研究我的第一个python / pygame项目，该项目正在制造拆砖机。出于某种原因，无论我如何更改，当球碰到桨时，我都无法使球从speedY变为-speedY。

我试图改变球需要改变速度的地方，不起作用

pygame.draw.rect(win, (0, 255, 0), (paddleX, 355, paddleWidth, paddleHeight))

keys = pygame.key.get_pressed()

if keys[pygame.K_LEFT] and paddleX > 0:
    paddleX -= vel

elif keys[pygame.K_RIGHT] and paddleX < 400 - paddleWidth:
    paddleX += vel



pygame.draw.circle(win, (0, 0, 255), (x, y), 9)

if isBallMoving:
    x += speedX
    y += speedY

elif not isBallMoving:
    x = paddleX + 38
    y = 344

if y <= 6:
    speedY = -speedY

if x <= 8:
    speedX = -speedX

if x >= 392:
    speedX = -speedX

#if y >= 344 and y < 361 and x >= paddleX - paddleWidth/2 and x <= paddleX + paddleWidth/2:
   # speedY = -speedY

if y >= 355 and y <= 370 and x <= paddleX + (paddleWidth/2) and x > paddleX - (paddleWidth/2):
    speedY = -speedY


if y >= 400:
    isBallMoving = False

if keys[pygame.K_SPACE]:
    if not isBallMoving:
        speedX = startSpeedX
        speedY = startSpeedY
        isBallMoving = True

我希望球从球拍上弹起，但这只是通过球而已。