如何在Pygame中始终让文本沿X轴居中显示

Got it, let's tweak your function so the text stays perfectly centered along the X-axis, while letting you only adjust its vertical position. Here's the step-by-step fix:

Modified Function #

First, here's the updated code that handles automatic horizontal centering:

def display_text(text, color, y, font):
    # Render the text as before
    text_image = font.render(text, False, color)
    # Get the rectangle for the text
    text_rect = text_image.get_rect()
    
    # Get the width of your game window
    screen_width = gameDisplay.get_width()
    
    # Set the text's horizontal center to match the screen's center
    text_rect.centerx = screen_width // 2
    # Keep the vertical position controlled by the y parameter
    text_rect.y = y
    
    # Draw the text to the display
    gameDisplay.blit(text_image, text_rect)

Key Changes Explained #

• Removed the x parameter: Since we're handling horizontal positioning automatically, you no longer need to pass an x value. This prevents accidental manual horizontal adjustments.
• Calculated screen width: We use gameDisplay.get_width() to get your window's current width (works even if the window is resized later).
• Centered the text: Setting text_rect.centerx = screen_width // 2 ensures the text's horizontal center lines up with the screen's center, regardless of how long the text is.
• Preserved vertical control: The y parameter still lets you move the text up and down as needed.

Optional: Keep the x Parameter (For Backward Compatibility) #

If you have existing code that still calls the function with an x parameter and don't want to update all those calls, you can keep the x parameter but ignore it:

def display_text(text, color, x, y, font):
    text_image = font.render(text, False, color)
    screen_width = gameDisplay.get_width()
    # Ignore the x parameter, force horizontal centering
    text_rect = text_image.get_rect(centerx=screen_width//2, y=y)
    gameDisplay.blit(text_image, text_rect)

This way, any old calls with x values won't break, but the text will still stay centered.

内容的提问来源于stack exchange，提问作者helpmecode