在应用程序循环之前创建 Rectangle 的实例，但是必须将事件列表传递给方法 naming并处理该方法中的所有相关事件.在类中添加 draw 方法，并在每一帧中绘制对象:

Create the instance of Rectangle before the application loop, but you have to pass the list of events to the method naming and to handle all the relevant events in the method. Add a draw method to the class and draw the object in every frame:

class Rectangle:
    # [...]

    def naming(self, events):
        # [...]

        for event in evetnts:
            if e.type == KEYDOWN:
                # [...]

        
            if e.type == # [...]

    def draw(self, screen):
        # [...]

rect_1 = Rectangle(200, 200)

run = True
while run :
    
    events = event.get()
    for e in events:
        if e.type == QUIT:
            run = False
    
    rect_1.naming(events)

    # [...]

    rect_1.draw(screen)      

完整示例:

Complete example:

import pygame
from pygame import *

init()
screen = display.set_mode((800, 600))

name_font = font.Font(None, 32)
name_text = ''


class Rectangle:

    def __init__(self, x, y):
        self.active = False
        self.x = x
        self.y = y
        self.text_surface = name_font.render(name_text, True, (255, 255, 255))
        self.rect_width = max(140, 10 + self.text_surface.get_width())
        self.input_rect = Rect(x, y, self.rect_width, 32)
        draw.rect(screen, (0, 0, 0), self.input_rect, 0)
        draw.rect(screen, (255, 255, 255), self.input_rect, 2)
        self.input_rect.w = self.text_surface.get_width() + 10
        screen.blit(self.text_surface, (self.input_rect.x + 5, self.input_rect.y + 5))

    def naming(self, events):
        global rect_1
        global name_text

        for e in events:
            if e.type == MOUSEBUTTONDOWN:
                mx, my = e.pos
                if self.input_rect.x + 150 >= mx >= self.input_rect.x - 10:
                    if self.input_rect.y + 40 >= my >= self.input_rect.y - 10:
                        self.active = True
                if not self.input_rect.x + 150 >= mx >= self.input_rect.x - 10:
                    if not self.input_rect.y + 40 >= my >= self.input_rect.y - 10:
                        self.active = False

            if e.type == KEYDOWN:
                if self.active:
                    if e.key == K_BACKSPACE:
                        name_text = name_text[:-1]
                    else:
                        name_text += e.unicode
                    self.text_surface = name_font.render(name_text, True, (255, 255, 255))
    
    def draw(self, screen):
        draw.rect(screen, (0, 0, 0), self.input_rect, 0)
        draw.rect(screen, (255, 255, 255), self.input_rect, 2)
        self.input_rect.w = self.text_surface.get_width() + 10
        screen.blit(self.text_surface, (self.input_rect.x + 5, self.input_rect.y + 5))


rect_1 = Rectangle(200, 200)

run = True
while run :
    
    events = event.get()
    for e in events:
        if e.type == QUIT:
            run = False
    
    rect_1.naming(events)

    screen.fill(0)
    rect_1.draw(screen)  
    display.update()
    time.delay(1)