pygame-将文本添加到rect的类实例

如何解决pygame-将文本添加到rect的类实例

我正在尝试将文本添加到rect的类实例中。

我可以通过在类之外设置“ font”变量并将所需的文本放置在绘制功能中的“ font.render_to”中来做到这一点，但这意味着所有按钮的文本均与其相同是在课程中设置的。

我想为类实例中指定的每个按钮（button1，button2，button3）设置不同的文本，如下面的代码所示，但出现以下错误：

Traceback (most recent call last):
File "path_to_file/test.py",line 30,in <module>
button1 = Button(10,10,100,50,'One')
File "path_to_file/test.py",line 23,in __init__
self.font = font.pygame.freetype.SysFont('Arial',25)
AttributeError: 'str' object has no attribute 'pygame'.

代码：

import pygame
import sys
import pygame.freetype


pygame.display.init()
pygame.freetype.init()
width = 300
height = 350
bg = (255,255,255)

# Sets the window size
screen = pygame.display.set_mode((width,height))

# Sets the background colour to white
screen.fill(bg)


# Button class - All buttons are created using the below parameters
class Button:

    def __init__(self,rect_x,rect_y,rect_width,rect_height,font):
        self.rect_x = rect_x
        self.rect_y = rect_y
        self.rect_width = rect_width
        self.rect_height = rect_height
        self.font = font.pygame.freetype.SysFont('Arial',25)

# Draw function - Creates the rectangle and adds text
    def draw(self):
        pygame.draw.rect(screen,(200,200,200),(self.rect_x,self.rect_y,self.rect_width,self.rect_height))
        self.font.render_to(screen,(42,25),self.font,bg)


# Class instances - Defines button size and location in the PyGame window
button1 = Button(10,'One')
button2 = Button(10,70,'Two')
button3 = Button(10,130,'Three')

# game loop
while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()
    button1.draw()
    button2.draw()
    button3.draw()
    pygame.display.update()

解决方法

构造函数的第5个参数是文本。您必须将文本存储在属性中并呈现文本。 font.pygame.freetype.SysFont('Arial',25)没有任何意义。字体对象由pygame.freetype.SysFont('Arial',25)构造。 render_to的目标位置取决于按钮的位置：

class Button:
    def __init__(self,rect_x,rect_y,rect_width,rect_height,text):
        self.rect_x = rect_x
        self.rect_y = rect_y
        self.rect_width = rect_width
        self.rect_height = rect_height   
        self.text = text   
        self.font = pygame.freetype.SysFont('Arial',25)

    def draw(self):
        pygame.draw.rect(screen,(200,200,200),(self.rect_x,self.rect_y,self.rect_width,self.rect_height))     
        self.font.render_to(screen,(self.rect_x + 42,self.rect_y + 25),self.text,bg)