为什么 PyGame 动画闪烁

Question

所以我运行代码，它开始出现故障。我是 pygame 的新手。

代码如下：

import pygame

pygame.init()
# Screen (Pixels by Pixels (X and Y (X = right and left Y = up and down)))
screen = pygame.display.set_mode((1000, 1000))
running = True
# Title and Icon
pygame.display.set_caption("Space Invaders")
icon = pygame.image.load('Icon.png')
pygame.display.set_icon(icon)
# Player Icon/Image
playerimg = pygame.image.load('Player.png')
playerX = 370
playerY = 480

def player(x, y):
    # Blit means Draw
    screen.blit(playerimg, (x, y))


# Game loop (Put all code for pygame in this loop)
while running:
    screen.fill((225, 0, 0))
    pygame.display.update()

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
    # if keystroke is pressed check whether is right or left
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                print("Left arrow is pressed")

            if event.key == pygame.K_RIGHT:
                print("Right key has been pressed")


            if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
                print("kEYSTROKE RELEASED")

    # RGB (screen.fill) = red green blue

    player(playerX, playerY)
    pygame.display.update()

图片不是故障图片，因为我无法发布视频，但这是我的代码所做的

Answer 1

问题是由多次调用pygame.display.update() 引起的。在应用程序循环结束时更新显示就足够了。多次调用pygame.display.update() 或pygame.display.flip() 会导致闪烁。

从您的代码中删除对pygame.display.update() 的所有调用，但在应用程序循环结束时调用一次：

while running:
    screen.fill((225, 0, 0))
    # pygame.display.update() <---- DELETE

    # [...]

    player(playerX, playerY)
    pygame.display.update()

如果您在screen.fill() 之后更新显示，则显示会在短时间内填充背景颜色。然后播放器被绘制 (blit) 并显示播放器在背景之上。