Question

在按键的同时连续移动物体时出现问题。据我所知，pygame事件仅在接收到新信号时触发，并且按下的键不是每帧继续的信号。从下面的代码中，当我按 w 时，对象仅在按下和释放按键时移动。只要我按下按键，我就无法移动物体。我也通过检查event.key而不是检查get_pressed()列表来尝试if语句，但我得出了相同的结果。

while not crashed:
for event in pygame.event.get():
    if event.type == pygame.QUIT:
        crashed = True

    keys = pygame.key.get_pressed()
    print(keys[pygame.K_w])

    if keys[pygame.K_w] and keys[pygame.K_d]:
        x_change = 3
        x += x_change
        y_change = -3
        y += y_change
    elif keys[pygame.K_w] and keys[pygame.K_a]:
        x_change = -3
        x += x_change
        y_change = -3
        y += y_change
    elif keys[pygame.K_s] and keys[pygame.K_d]:
        x_change = 3
        x += x_change
        y_change = 3
        y += y_change
    elif keys[pygame.K_s] and keys[pygame.K_a]:
        x_change = -3
        x += x_change
        y_change = 3
        y += y_change

    elif keys[pygame.K_a]:
        x_change = -3
        x += x_change
    elif keys[pygame.K_d]:
        x_change = 3
        x += x_change
    elif keys[pygame.K_w]:
        y_change = -3
        y += y_change
    elif keys[pygame.K_s]:
        y_change = 3
        y += y_change


    #ERASE OLD
    screen.fill(WHITE)
    #FILL NEW
    all_sprites_list.draw(screen)
    wall.changePosition(x,y)
    player.draw(start_x,start_y)

    pygame.display.update()
    clock.tick(60)

Answer 1

看起来行keys = pygame.key.get_pressed()和以下行都在事件循环中，这意味着它们仅在事件队列中的每个事件中执行一次。它们实际上应该在外部while循环中，所以只需要这些行：

while not crashed:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            crashed = True

    keys = pygame.key.get_pressed()

    if keys[pygame.K_w] and keys[pygame.K_d]:
        x_change = 3
    # etc.

您还可以稍微缩短代码：

x_change = 3
y_change = 3

crashed = False
while not crashed:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            crashed = True

    keys = pygame.key.get_pressed()

    if keys[pygame.K_a]:
        x += -x_change
    elif keys[pygame.K_d]:
        x += x_change

    if keys[pygame.K_w]:
        y += -y_change
    elif keys[pygame.K_s]:
        y += y_change

另一种方法是删除key.get_pressed行，只需在事件循环中设置x_change和y_change：

for event in pygame.event.get():
    if event.type == pygame.QUIT:
        crashed = True
    elif event.type == pygame.KEYDOWN:
        if event.key == pygame.K_d:
            x_change = 3
        # etc.
    elif event.type == pygame.KEYUP:
        if event.key == pygame.K_d and x_change > 0:
            x_change = 0
        # etc.

Pygame在按键的同时移动物体

1 个答案: