你如何从 pygame 中删除图像

Question

我试图为我的游戏创建一个自定义菜单，为此我制作了一个光标，以便用户能够从 3 个字符中的一个中进行选择，错误是光标的图像被复制到下一个位置和原来的一个留下来，我想知道是否有办法删除原来的光标。

One_Right_Key = pygame.K_RIGHT

# Creating the customisation menu for the game
def Customisation(players):
    #Initiating TwoX in case there is no second player to make sure the program works correctly
    TwoX = 100
    # Placing the background onto the game
    background = pygame.image.load('Menu/Customisation Background.png')
    screen.blit(background, (0, 0))
    # Creating an array for each of the x positions of the 3 options of characters
    x = [157, 545, 954]
    # Creating the Cursor for the first player
    CursorOne = pygame.image.load('Misc/P1 Cursor.png')
    CursorOne = pygame.transform.scale(CursorOne, (124, 100))
    CursorOne_move = CursorOne.get_rect()
    # Creating a variable to give the position of the cursor and placing it onto the screen
    OneX = 0
    screen.blit(CursorOne, (x[OneX], 61))
    # Checking if there is one or two players playing the game
    if players == 2:
        # Creating the cursor for the second player
        CursorTwo = pygame.image.load('Misc/P2 Cursor.png')
        CursorTwo = pygame.transform.scale(CursorTwo, (124, 100))
        # Creating a variable to give the position of the second cursor
        TwoX = 1
        screen.blit(CursorTwo, (x[TwoX], 61))
    # Creating the back button
    Back_Text = BackButtonFont.render("Back", True, (255, 255, 255))
    # Placing the text onto the screen
    screen.blit(Back_Text, (37, 628))
    # Updating the screen
    pygame.display.update()
    # Keeps the program running
    Running = True
    while Running == True:
        for event in pygame.event.get():
            # If the user clicks on the back button
            if event.type == pygame.MOUSEBUTTONUP:
                mouse = pygame.mouse.get_pos()
                if mouse[0] >= 0 and mouse[0] <= 280 and mouse[1] > 611 and mouse[1] <= 719:
                    # Goes to the Main Menu Procedure
                    MainMenu()
                    # Exits the customisation procedure
                    exit(Customisation())
            # If the player presses a key
            if event.type == pygame.KEYDOWN:
                if event.key == One_Right_Key:
                    OneX = OneX + 1
                    # If OneX is the same as TwoX, it moves to the next one
                    if OneX == TwoX:
                        OneX = OneX + 1
                    # If OneX is over, it goes back to the first position
                    if OneX == 3:
                        OneX = 0
                    CursorOne_move.move_ip(x[OneX], 61)
                    screen.blit(CursorOne, CursorOne_move)
                pygame.display.flip()
            # If the user clicks on the cross on the top right of the window
            if event.type == pygame.QUIT:
                exit()

游戏的所有文件

Answer 1

您无法“删除”屏幕上绘制的图像。 您必须在每一帧中重新绘制完整的场景。 删除（或“移除”）一个对象意味着不在下一帧中绘制它。

典型的 PyGame 应用程序循环必须：

• 使用pygame.time.Clock.tick限制每秒帧数以限制 CPU 使用率
• 通过调用pygame.event.pump()或pygame.event.get()处理事件。
• 根据输入事件和时间（分别为帧）更新游戏状态和对象的位置
• 清除整个显示或绘制背景
• 绘制整个场景（ blit所有对象）
• 通过调用pygame.display.update()或pygame.display.flip()更新显示