我和我的朋友们正在PyGame中做一个问答游戏,想知道如何,当用户按下一个按钮时,他可以转到下一个问题(而不会留下前一个文本)。
First of all I would suggest that you go to the PyGame documentation and read up a little about PyGame. ( Link )
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.
Example:
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()
In your game loop, before drawing the new frame, fill the frame with the background color.
Example:
ball = pygame.Rect(0,0,10,10)
while True:
mainSurface.fill((0,0,0))
pygame.draw.circle(display,(255,255,255),ball.center,5)
ball.move_ip(1,1)
pygame.display.update()
The key point is the mainSurface.fill which will clear the previous frame.
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