为什么我的运动在我将其放入功能后不起作用？

Question

def playing():
    global in_game
    x = 250
    y = 250
    width = 10
    height = 10
    white = (255, 255, 255)
    black = (0, 0, 0)
    keys = pygame.key.get_pressed()
    while in_game:
        for event in pygame.event.get():
            print(event)
            if event.type == pygame.QUIT:
                in_game = False

        if keys[pygame.K_UP]:
            y -= 1
        elif keys[pygame.K_DOWN]:
            y += 1
        elif keys[pygame.K_LEFT]:
            x -= 1
        elif keys[pygame.K_RIGHT]:
            x += 1

        win.fill(white)
        pygame.draw.rect(win, black, (x, y, width, height))
        pygame.display.flip()

在这段代码中，我将 x 和 y 作为水平和垂直移动。我在屏幕底部调用了我的函数。

Answer 1

pygame.key.get_pressed() returns 表示键当前状态的布尔值列表。您必须在应用程序循环中连续评估键的状态，而不是在循环之前评估一次：

# keys = pygame.key.get_pressed() <----- DELETE
while in_game:
    for event in pygame.event.get():
        print(event)
        if event.type == pygame.QUIT:
            in_game = False

    keys = pygame.key.get_pressed() # <----- INSERT

    if keys[pygame.K_UP]:
        y -= 1
    elif keys[pygame.K_DOWN]:
        y += 1
    elif keys[pygame.K_LEFT]:
        x -= 1
    elif keys[pygame.K_RIGHT]:
        x += 1

    # [...]

为什么我的运动在我将其放入功能后不起作用？

Why isn't my movement working after I put it in a function?

python

pygame

event-loop