如何让图像移动直到我停止按键[重复]

Question

我正在使用 pygame，我有基本的运动，当我按下按键时，十字准线会移动，但是我似乎无法通过按住按键来使图像移动。我还如何通过按 wasd 键使图像沿对角线移动。 干杯

# Main game loop
def main_game():
    running = True
    while running:
        global cross_x, cross_y
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                return

        # Draw game screen
            screen.blit(background, (0, 0))
        # Crosshair movement  
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_d:
                    cross_x = cross_x + 10
                if event.key == pygame.K_a:
                    cross_x = cross_x - 10
                if event.key == pygame.K_w:
                    cross_y = cross_y - 10
                if event.key == pygame.K_s:
                    cross_y = cross_y + 10
                

        screen.blit(crosshair, (cross_x, cross_y))    
        pygame.display.update()
        clock.tick(60)

这是当前代码，按下按键时十字准线仅移动一次

Answer 1

您可以将按下的按键存储在一组中。

• 按下按键时，将密钥存储在一组中
• 按下钥匙时，从钥匙组中移除钥匙
• 循环时，检查key是否在集合中

# Set to track pressed keys
pressed_keys = set()

# Main game loop
def main_game():
    global cross_x, cross_y
    running = True
    while running:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                pygame.quit()
                return
            
            # Add keys to the set on KEYDOWN
            if event.type == pygame.KEYDOWN:
                pressed_keys.add(event.key)
            
            # Remove keys from the set on KEYUP
            if event.type == pygame.KEYUP:
                pressed_keys.discard(event.key)

        # Handle crosshair movement
        if pygame.K_d in pressed_keys:
            cross_x += 10
        if pygame.K_a in pressed_keys:
            cross_x -= 10
        if pygame.K_w in pressed_keys:
            cross_y -= 10
        if pygame.K_s in pressed_keys:
            cross_y += 10

        # Draw the game screen
        screen.blit(background, (0, 0))
        screen.blit(crosshair, (cross_x, cross_y))
        pygame.display.update()
        clock.tick(60)