为什么会出现“NameError: name 'draw_Objects' is not defined”

Question

我正在使用 pygame 制作一个小游戏。 我定义了一个名为 draw_Objects() 的 function，但出现名称错误，就好像我没有定义 function 一样。 我应该怎么办？ 代码是模块的一部分

我试图改变 draw_Objects() function 但我无法解决。

 import pygame
 from const import *

   class item(pygame.sprite.Sprite):

    def __init__(self,game):

        super().__init__()
        self.game=game

        #self.screen=screen
        self.width=WIDTH
        self.height=HEIGHT

        #potion 사진 불러옴
        self.image=pygame.image.load("tile/red-potion.png")
        self.rect = self.image.get_rect()
        self.red_potion=pygame.image.load("tile/red-potion.png")
        self.blue_potion=pygame.image.load("tile/blue-potion.png")

        self.mask=pygame.mask.from_surface(self.image)
        self.rect = self.image.get_rect()

    redItem=[50,530,300,50,850,100,600,280,800,400]

    def __call__(self):
        print (" ")


    def item_display(self,screen):
        #아이템 화면에 표시
        screen.blit(self.red_potion,(50,530)) #red1
        screen.blit(self.blue_potion,(30,530))

        screen.blit(self.blue_potion,(30,460))

        screen.blit(self.red_potion,(300,50)) #red2
        screen.blit(self.blue_potion,(400,150))

        screen.blit(self.image,(850,100)) #red3
        screen.blit(self.red_potion,(600,280)) #red4
        screen.blit(self.red_potion,(800,400)) #red5
        screen.blit(self.blue_potion,(600,370))

    def draw_Objects(myList=[]):
        for i in myList:
            x=myList[i]
            y=myList[i+1]
            screen.blit(self.red_potion,(x,y))
            i+=1

    def item_eat(self,screen):
        item__=item(self)
        #red2 item
        self.rect.x=300
        self.rect.y=50
        #item과 player 충돌 검사
        hits_item=pygame.sprite.spritecollide(self,self.game.player_group,False,pygame.sprite.collide_mask)

        if hits_item :
            screen.blit(self.red_potion,(50,530)) #red1
            screen.blit(self.blue_potion,(30,530))

            screen.blit(self.blue_potion,(30,460))
            screen.blit(self.blue_potion,(400,150))

            screen.blit(self.red_potion,(850,100)) #red3
            screen.blit(self.red_potion,(600,280)) #red4
            screen.blit(self.red_potion,(800,400)) #red5
            screen.blit(self.blue_potion,(600,370))
        else:
            #item__.item_display(self.screen)
            draw_Objects(redItem)

Answer 1

draw_Objects 不是全局 function，它是 class 的一个属性，可以用 self 调用。

def item_eat(self,screen):
        item__=item(self)
        #red2 item
        self.rect.x=300
        self.rect.y=50
        #item과 player 충돌 검사
        hits_item=pygame.sprite.spritecollide(self,self.game.player_group,False,pygame.sprite.collide_mask)

        if hits_item :
            screen.blit(self.red_potion,(50,530)) #red1
            screen.blit(self.blue_potion,(30,530))

            screen.blit(self.blue_potion,(30,460))
            screen.blit(self.blue_potion,(400,150))

            screen.blit(self.red_potion,(850,100)) #red3
            screen.blit(self.red_potion,(600,280)) #red4
            screen.blit(self.red_potion,(800,400)) #red5
            screen.blit(self.blue_potion,(600,370))
        else:
            #item__.item_display(self.screen)
            self.draw_Objects(redItem) # Change this line to reference draw_Objects

Answer 2

这很简单。

def draw_Objects(self):
    myList=[]
    for i in myList:
        x=myList[i]
        y=myList[i+1]
        screen.blit(self.red_potion,(x,y))
        i+=1

然后这样称呼它：

self.draw_Objects()

Answer 3

这条线

draw_Objects(redItem)

正在寻找一个不存在的名为 draw_Objects 的全局 function。 你需要打电话

self.draw_Objects(redItem)

但是，您还需要将self作为参数包含在 function 定义中，如下所示

def draw_Objects(self, myList=[]):