为什么我的玩家角色不会移动？

Question

我希望我的角色在按下 w/a/s/d 时向上/向左/向下/向右移动。我认为应该发生的是，例如，当我按 d 时：

1. main() 将“看到”正在发生的事件

2. 看到我按下了一个键

3. 转到player1.move()

4. 看到密钥是 d

5. 转到Character.move_right(self)

6. 更新x_pos和x_vel

7. 返回main()

8. 转到player1.display()

9. 在更新后的x_pos 和x_vel 所在的位置绘制一个矩形

10. 更新屏幕

11. “打卡”

不过，这显然不会发生。我在哪里误解了正在发生的事情？

import sys
import pygame


class Character(object):
    def __init__(self, surface, x_vel, y_vel, x_pos, y_pos):
        self.surface = surface
        self.x_vel = x_vel
        self.y_vel = y_vel
        self.x_pos = x_pos
        self.y_pos = y_pos
        self.size = (5, 20)

    def move_right(self):
        self.x_vel += 5
        self.x_pos += self.x_vel

    def move_left(self):
        self.x_vel -= 5
        self.x_pos += self.x_vel

    def move_up(self):
        self.y_vel -= 5
        self.y_pos += self.y_vel

    def move_down(self):
        self.y_vel += 5
        self.y_pos += self.y_vel

    def move(self):
        for event in pygame.event.get():
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_w:
                    Character.move_up(self)
                elif event.key == pygame.K_a:
                    Character.move_left(self)
                elif event.key == pygame.K_s:
                    Character.move_down(self)
                elif event.key == pygame.K_d:
                    Character.move_right(self)
        self.character = pygame.Rect((self.x_pos, self.y_pos), self.size)

    def display(self):
        pygame.draw.rect(self.surface, (255, 255, 255), self.character)

pygame.init()

screen = pygame.display.set_mode((640, 480))
screen_rect = screen.get_rect()

clock = pygame.time.Clock()

fps = 30


def main():
    while True:
        for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    pygame.quit()
                    sys.exit()
                else:
                    player1 = Character(screen, 0, 0, 200, 200)
                    player1.move()

        player1.display()

        pygame.display.update(screen_rect)
        clock.tick(fps)

if __name__ == "__main__":
    main()

Answer 1

总结可能的错误：

正如@tobias_k 指出的那样，您的事件已经被消耗掉了。可以这样解决

def move(self, event):
    if event.type == pygame.KEYDOWN:
        if event.key == pygame.K_w:
            ....

def main():
    player1 = Character(screen, 0, 0, 200, 200)
    while True:
        for event in pygame.event.get():
                if event.type == pygame.QUIT:
                    pygame.quit()
                    sys.exit()
                else:
                    player1.move(event)

其次，将角色的创建移出主循环

def main():
    player1 = Character(screen, 0, 0, 200, 200)
    while True: