使用 pygame 键盘在屏幕上移动文本答案

【问题标题】：Moving text on the screen using pygame keyboard使用 pygame 键盘在屏幕上移动文本
【发布时间】：2014-12-08 20:32:44
【问题描述】：

我正在尝试使用键盘箭头移动屏幕左侧或右侧的文本，但无法正常工作。我的代码是：

while True :

    font = pygame.font.SysFont("Times New Roman", 20) # Font type # Font style 
    frame = pygame.display.set_mode ((Renderer.CANVAS_WIDTH, Renderer.CANVAS_HEIGHT))

    frame.fill ((49,33,148))

    for event in pygame.event.get ():
        if event.type == QUIT :
            pygame.quit ()
            sys.exit    ()

        if event.type == pygame.KEYDOWN :

                f = pygame.font.SysFont("Times New Roman", 20) # Font type # Font style 
                Track = font.render("Track : ", True, (255,255,0) )



    Game ()
    pygame.draw.rect(frame, (30,21,95),(50,400,700,170)) # draw a blue box on the screen 
    Track = font.render("Track : ", True, (255,255,0) )
    frame.blit(Track,(80,410))

    Labs = font.render ("Labs :", True, (255,255,0))
    frame.blit(Labs,(80,440))

    Distance = font.render ("Distance :", True, (255,255,0))
    frame.blit(Distance,(80,480))


    pygame.display.update ()  # Update the screen 






pygame.quit ()
quit ()

【问题讨论】：

为什么方法名和括号之间有空格？另外，它是如何“不起作用”的？

标签： python pygame

【解决方案1】：

您应该使用此代码通过 pygame 使用键盘移动文本

f = pygame.font.SysFont("Times New Roman", 20) # Font type # Font style 
Track = font.render("Track : ", True, (255,255,0) )

xpos = 10
ypos = 10

while True:

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_w:
                ypos -= 5
            if event.key == pygame.K_s:
                ypos += 5
            if event.key == pygame.K_a:
                xpos -= 5
            if event.key == pygame.K_d:
                xpos += 5

    frame.fill((255, 255, 255))
    frame.blit(Track, (xpos, ypos))
    pygame.display.flip()

但是，这只会在您按下键时起作用，它不会让您按住它。要做到这一点，它有点复杂。见：

f = pygame.font.SysFont("Times New Roman", 20) # Font type # Font style 
Track = font.render("Track : ", True, (255,255,0) )

moveUp = False
moveDown = False
moveRight = False
moveLeft = Falsed

xpos = 10
ypos = 10

while True:

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_w:
                moveUp = True
            if event.key == pygame.K_s:
                moveDown = True
            if event.key == pygame.K_a:
                moveLeft = True
            if event.key == pygame.K_d:
                moveRight = True
        elif event.type == pygame.KEYUP:
            if event.key == pygame.K_w:
                moveUp = False
            if event.key == pygame.K_s:
                moveDown = False
            if event.key == pygame.K_a:
                moveLeft = False
            if event.key == pygame.K_d:
                moveRight = False

    if moveUp:
        ypos -= 5
    elif moveDown:
        ypos += 5
    if moveLeft:
        xpos -= 5
    elif moveRight:
        xpos += 5

    frame.fill((255, 255, 255))
    frame.blit(Track, (xpos, ypos))
    pygame.display.flip()

【讨论】：