如何在pygame中清除屏幕? [英] How to clear up screen in pygame?

问题描述

我和我的朋友正在 PyGame 中制作一个问答游戏，想知道如何当用户按下按钮时，他可以转到下一个问题(不留下之前的文本).

My friends and I are making a quiz game in PyGame and would like to know how, when the user presses a button, he can go to next question (without leaving the previous text behind).

推荐答案

首先，我建议您转到 PyGame 文档并阅读一些有关 PyGame 的信息.(链接)

First of all I would suggest that you go to the PyGame documentation and read up a little about PyGame. (Link)

然而，为了节省您的时间，您必须在屏幕上绘制一组新的形状/文字之前使用函数screen.fill(#Your selected colour).这就是 PyGame 中的功能，它摆脱了旧屏幕，并允许您在清晰的屏幕上绘制新项目，而不会留下以前的图纸.

However to save you time what you have to do is before you draw your new set of shapes/writings on the screen you have to use the function screen.fill(#Your chosen colour). That is the function in PyGame that gets rid of the old screen and allows you to draw new items on to a clear screen without the pervious drawings left on there.

示例:

import pygame
import sys
from pygame.locals import *

white = (255,255,255)
black = (0,0,0)
red = (255, 0, 0)

class Pane(object):
    def __init__(self):
        pygame.init()
        self.font = pygame.font.SysFont('Arial', 25)
        pygame.display.set_caption('Box Test')
        self.screen = pygame.display.set_mode((600,400), 0, 32)
        self.screen.fill((white))
        pygame.display.update()


    def addRect(self):
        self.rect = pygame.draw.rect(self.screen, (black), (175, 75, 200, 100), 2)
        pygame.display.update()

    def addText(self):
        self.screen.blit(self.font.render('Hello!', True, black), (200, 100))
        pygame.display.update()

    def addText2(self):
        self.screen.blit(self.font.render('Hello!', True, red), (200, 100))
        pygame.display.update()


    def functionApp(self):
        if __name__ == '__main__':
            self.addRect()
            self.addText()
            while True:
                for event in pygame.event.get():
                    if event.type == pygame.QUIT:
                        pygame.quit(); sys.exit();

                    if event.type == pygame.KEYDOWN:
                        if event.key == pygame.K_ESCAPE:
                            self.screen.fill(white)
                            self.addRect()
                            self.addText2() #i made it so it only changes colour once.



display = Pane()
display.functionApp()

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