Pygame 没有移动我的矩形，我不知道为什么?

问题描述

我不知道为什么但我的角色在显示中但不能移动它在一个精灵组中并且一直在更新

I dont know why but my character is in the display but it cant move it is in a sprite group and it is updated all the time

class player(pygame.sprite.Sprite):
    def __init__(self):
        pygame.sprite.Sprite.__init__(self)
        self.image  = pygame.Surface( (30 , 30))
        self.image.fill (red)
        self.rect = self.image.get_rect ()
        self.rect.y = height /2
        self.rect.x = width-50
        self.speedy = 0


    def update(self):
        self.speedy = 0
        keystate = pygame.key.get_pressed()
        if keystate[pygame.K_UP]:
            self.speedy = 8

        if keystate[pygame.K_DOWN]:
            self.speedy = -8
        if self.rect.bottom >= height:
            self.rect.top = 0
        if self.rect.top <= 0:
            self.rect.bottom = height

推荐答案

你必须不断地改变.rect"的位置更新"中的属性快速"的方法:

You have to continuously change the position of the ".rect" attribute in the "update" method by "speedy":

self.rect.y += self.speedy

确保pygame.sprite.Group.update 在每一帧中被调用并在评估速度后改变位置:

Ensure that pygame.sprite.Group.update is invoked in every frame and change the position after evaluating the speed:

class player(pygame.sprite.Sprite):
    # [...]

    def update(self):
        self.speedy = 0
        keystate = pygame.key.get_pressed()
        if keystate[pygame.K_UP]:
            self.speedy = 8
        if keystate[pygame.K_DOWN]:
            self.speedy = -8

        self.rect.y += self.speedy

        if self.rect.bottom >= height:
            self.rect.top = 0
        if self.rect.top <= 0:
            self.rect.bottom = height

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