python - pygame鼠标按钮按下不起作用

Question

我正在制作这个多项选择程序，但我需要鼠标事件仅在按下 Enter 后才起作用。

这是我的代码:

    for event in pygame.event.get(): # If user did something
        if event.type == pygame.QUIT: # If user clicked close
            done = True
        elif event.type == pygame.KEYDOWN: # If user pressed a key
            if event.key == pygame.K_RETURN: # If user pressed enter
                # Makes the start screen go away
                enter_pressed = True
                # Increments question_number
                question_number += 1

                # Where I Draw the question screen

然后在下面我有这个:

                for event in pygame.event.get(): # If user did something
                    if event.type == pygame.MOUSEBUTTONDOWN and event.button == 1:
                        print("Derp") 

当我按下鼠标左键时，Derp 不会打印。但是，当我像这样缩进时:

    for event in pygame.event.get(): # If user did something
        if event.type == pygame.QUIT: # If user clicked close
            done = True
        elif event.type == pygame.KEYDOWN: # If user pressed a key
            if event.key == pygame.K_RETURN: # If user pressed enter
                # Makes the start screen go away
                enter_pressed = True
                # Increments question_number
                question_number += 1

                # Where I Draw the question screen           

        elif event.type == pygame.MOUSEBUTTONDOWN and event.button == 1:
                        print("Derp") 

当我按下鼠标左键时，Derp 会打印

Answer 1

您可以使用 bool 值来指示是否按下 Enter 键。

for event in pygame.event.get(): # If user did something
    enter_pressed = False
    if event.type == pygame.QUIT: # If user clicked close
        done = True
    elif event.type == pygame.KEYDOWN: # If user pressed a key
        if event.key == pygame.K_RETURN: # If user pressed enter
            # Makes the start screen go away
            enter_pressed = True
            # Increments question_number
            question_number += 1

            # Where I Draw the question screen           

    elif event.type == pygame.MOUSEBUTTONDOWN and event.button == 1 and enter_pressed:
                    print("Derp")

我认为问题在于您正在迭代所有事件，并且在该循环内您正在迭代所有事件(再次)，这会导致一些问题