Python/Pygame; MOUSEBUTTONDOWN事件

Question

好吧我很新使用Pygame，我真的只是玩弄一些方法和事件。到目前为止，我几乎都有一个图像围绕pygame框架移动，并在框架的任何边缘弹起时弹起。如果图像触及框架的顶部，它将增加1的计数变量，这将显示在屏幕上。然后，我想添加一个功能，如果我点击正在移动的图像，它也会将一个添加到count变量。然而，当我在这个代码中添加了这个代码（我认为是因为函数在一个循环中运行），取决于你拖动鼠标的时间长短，计数增加了8的倍数。我想要这样做，不管我持有多久鼠标停下来，MOUSEBUTTONDOWN处理程序中存储的事件只会触发一次。我究竟做错了什么？

import pygame, sys 
from pygame.locals import * 

pygame.init() 
DISPLAYSURF = pygame.display.set_mode((400, 300)) 
pygame.display.set_caption('Hello World!') 
screen =pygame.display.set_mode((600,400)) 
ball = pygame.image.load("homers.png") 
ball = pygame.transform.scale(ball,(225,200)) 
x=200 
y=100 
left = True 
up = True 
color = 67,143,218 
def text_objects(text,font): 
    text_surface = font.render(text,True, color) 
    return text_surface,text_surface.get_rect() 

def message_display(text,x,y,z): 
    largeText = pygame.font.Font('freesansbold.ttf',z) 
    TextSurf,TextRect = text_objects(text,largeText) 
    TextRect.center = (x,y) 
    screen.blit(TextSurf,TextRect) 

def hi(x,y,p,z): 

    message_display(x,y,p,z) 
count = 0 
message_count = str(count) 
while True: # main game loop 
     screen.fill((180,0,0)) 
     screen.blit(ball,(x,y)) 



     for event in pygame.event.get(): 
       if event.type == QUIT: 
        pygame.quit() 
        sys.exit() 

     hi(message_count,x,y,140) 
     hi("How Many Times Has Homer Hit His Head?",300,200,20) 

     if event.type == pygame.MOUSEBUTTONDOWN: 
      # Set the x, y postions of the mouse click 

      if ball.get_rect().collidepoint(x, y): 
       count = count+1 

     if event.type == pygame.MOUSEBUTTONUP: 
      0 

     if left == True: 

      x=x-10 
     if x == -100: 
      left =False 
     if left == False: 

      x=x+10 
     if x == 450: 
      left = True 
     if up == True: 

      y=y-10 
     if y == -20: 
      up =False 
      count = count+1 
      message_count = str(count) 
      hi(message_count,x,y,140) 
     if up == False: 

      y=y+10 
     if y== 230: 
      up =True 
     pygame.display.update() 

Answer 1

你必须修复您的代码的缩进：

while True: # main game loop 
    screen.fill((180,0,0)) 
    screen.blit(ball,(x,y)) 

    hi(message_count,x,y,140) 
    hi("How Many Times Has Homer Hit His Head?",300,200,20) 

    for event in pygame.event.get(): 
     if event.type == QUIT: 
      pygame.quit() 
      sys.exit() 

     # this has to be part of the for loop 
     if event.type == pygame.MOUSEBUTTONDOWN: 
      if ball.get_rect().collidepoint(x, y): 
       count = count+1 

    ...