問題描述

import pygame

r_colour = (200, 100,100)
bg_colour = (0,175,200)
(width, height) = (600, 600)

screen = pygame.display.set_mode((width, height))
screen.fill(bg_colour)
pygame.draw.rect(screen, r_colour, (30, 30, 100, 100), 0)

pygame.display.flip()

running = True
while True:
    for event in pygame.event.get():
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_s:
                screen.fill(bg_colour)
                pygame.draw.rect(screen, r_colour, (20, 30, 100, 100), 0)
                pygame.display.update()


if running == True:
      for event in pygame.event.get():
          if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_s:
                    screen.fill(bg_colour)
                    pygame.draw.rect(screen, r_colour, (20, 30, 100, 100), 0)
                    pygame.display.update()



while running:
  for event in pygame.event.get():
    if event.type == pygame.QUIT:
      break
      running = False



pygame.quit()

我試圖讓紅色方塊在按下s"鍵時移動，不知道為什么它只移動一次然后停止.對編程非常陌生，所以很抱歉，如果它很長或難以閱讀.

I am trying to get the red square to move when pressing the 's' key, not sure as to why it only moves once and then stops. Very new to programming, so I am sorry, if it's long or hard to read.

推薦答案

一個典型的應用程序有 1 個單一的應用程序循環.應用程序循環:

A typical application has 1 single application loop. The application loop does:

• 處理事件并根據事件更改狀態
• 清除顯示
• 繪制場景
• 更新顯示

KEYDOWY 事件在按下某個鍵時發生一次，但在按住某個鍵時不會連續發生.
對于連續運動，您可以通過 <代碼>pygame.key.get_pressed():

The KEYDOWY event occurs once when a key is pressed, but it does not occur continuously when a key is hold down.
For a continuously movement you can get the state of the keys by pygame.key.get_pressed():

keys = pygame.key.get_pressed()

例如如果 s 的狀態被按下，可以通過 keys[pygame.K_s] 來評估.

e.g. If the state of s is pressed can be evaluated by keys[pygame.K_s].

為矩形的位置添加坐標(x, y).當按鍵被按下時，在主應用程序循環中不斷地操作位置.

Add coordinates (x, y) for the position of the rectangle. Continuously manipulate the position in the main application loop, when a key is pressed.

例如
如果按下 d，則增加 x，如果按下 a，則減少 x.
如果按下 s，則增加 y，如果按下 w，則減少 y:

e.g.
Increment x if d is pressed and decrement x if a is pressed.
Increment y if s is pressed and decrement y if w is pressed:

import pygame

r_colour = (200, 100,100)
bg_colour = (0,175,200)
(width, height) = (600, 600)
x, y = 20, 30

screen = pygame.display.set_mode((width, height))

running = True
while running:

    # handle the events
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    # change coordinates
    keys = pygame.key.get_pressed()
    if keys[pygame.K_d]:
        x += 1
    if keys[pygame.K_a]:
        x -= 1
    if keys[pygame.K_s]:
        y += 1
    if keys[pygame.K_w]:
        y -= 1

    # clear the display
    screen.fill(bg_colour)
    # draw the scene
    pygame.draw.rect(screen, r_colour, (x, y, 100, 100), 0)
    # update the display
    pygame.display.update()

pygame.quit()

這篇關于Python只運行一次while循環的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！