Pygame在Python中製作Pong時出現問題。當我移動它時，Paddle延伸

因此，與許多初學Python程序員一樣，我決定編寫一個pong遊戲。這是我的第二次嘗試。第一個是硬編碼，沒有類和功能，所以我從頭開始。我目前有一個槳板類和一個主循環。我已經編寫了槳的功能來上下移動，但是我遇到了問題。當我按下鍵移動槳時，它們只是向上和向下延伸，它們實際上並沒有移動。這裏是我的代碼至今：Pygame在Python中製作Pong時出現問題。當我移動它時，Paddle延伸

#PONG GAME IN PYTHON WITH PYGAME 

import pygame 
import time 

pygame.init() 

white = (255, 244, 237) 
black = (0, 0, 0) 

largeFont = pygame.font.Font("pongFont.TTF", 75) 
mediumFont = pygame.font.Font("pongFont.TTF", 50) 
smallFont = pygame.font.Font("pongFont.TTF", 25) 

displayWidth = 800 
displayHeight = 600 

gameDisplay = pygame.display.set_mode((displayWidth, displayHeight)) 
pygame.display.set_caption("Pong") 

FPS = 60 
menuFPS = 10 
clock = pygame.time.Clock() 

#Paddle Class 
class Paddle: 

    def __init__(self, player): 

     self.length = 100 
     self.width = 8 
     self.yVelocity = 0 
     self.y = (displayHeight - self.length)/2 

     #Puts player 1 paddle on left and player 2 on right 
     if player == 1: 
      self.x = 3 * self.width 
     elif player == 2: 
      self.x = displayWidth - 4 * self.width 

    #Did paddle hit top or bottom? 
    def checkWall(self): 

     if self.y <= 0: 
      return "top" 
     elif self.y >= displayHeight - self.length: 
      return "bottom" 

    def stop(self): 

     self.yVelocity = 0 

    def moveUp(self): 

     if self.checkWall() == "top": 
      self.stop() 
     else: 
      self.yVelocity = -self.width 

    def moveDown(self): 

     if self.checkWall() == "bottom": 
      self.stop() 
     else: 
      self.yVelocity = self.width 

    #Draw the paddle 
    def draw(self): 

     self.y += self.yVelocity 
     gameDisplay.fill(white, rect = [self.x, self.y, self.width,  self.length]) 

paddle1 = Paddle(1) 
paddle2 = Paddle(2) 

gameFinish = False 

#Main Loop 
while not gameFinish: 

    #Event Loop 
    for event in pygame.event.get(): 

     if event.type == pygame.QUIT: 
      pygame.quit() 
      quit() 

    #Get all pressed keys 
    keyPressed = pygame.key.get_pressed() 

    #Move paddle1 if s or w is pressed 
    if keyPressed[pygame.K_w]: 
     paddle1.moveUp() 
    elif keyPressed[pygame.K_s]: 
     paddle1.moveDown() 
    else: 
     paddle1.stop() 

    #Move paddle2 if UP or DOWN is pressed 
    if keyPressed[pygame.K_UP]: 
     paddle2.moveUp() 
    elif keyPressed[pygame.K_DOWN]: 
     paddle2.moveDown() 
    else: 
     paddle2.stop() 

    paddle1.draw() 
    paddle2.draw() 

    pygame.display.update() 
    clock.tick(FPS)

在此先感謝任何人誰可以幫助！

來源

2016-12-25 Herb Homework