self.screen_rect = ai_game.screen.get_rect()
时间: 2024-05-27 12:14:43 浏览: 149
This line of code creates a rectangle object that represents the dimensions of the game screen. The rectangle's position and size are determined by the dimensions of the screen object that is passed into the constructor (ai_game.screen).
By storing this rectangle object in the "self.screen_rect" attribute, it can be accessed throughout the class to determine the boundaries of the screen. This can be useful for things like checking if game objects are within the screen boundaries or positioning objects relative to the screen.
相关问题
让这个代码中的飞船可以移动#大战外星人 import pygame from settings import Settings from ship import Ship import game_functions as gf def run_game(): pygame.init() ai_setting=Settings() screen=pygame.display.set_mode((ai_setting.screen_width,ai_setting.screen_height)) pygame.display.set_caption("alien invasion") ship=Ship(screen,ai_setting) while True: gf.check_event(ship) ship.update(screen) gf.update_screen(ai_setting,screen,ship) pygame.display.flip() run_game() #game_functions import sys import pygame def check_event(ship): for event in pygame.event.get(): if event.type == pygame.QUIT:
要让飞船可以移动,你需要在 `Ship` 类中添加移动的方法,并在 `game_functions` 模块中添加检测按键事件的函数。具体步骤如下:
1. 在 `Ship` 类中添加 `move_right()` 和 `move_left()` 方法,用于将飞船向右或向左移动一定的距离。
```python
class Ship():
def __init__(self, screen, ai_setting):
...
def move_right(self):
self.rect.centerx += self.ai_setting.ship_speed_factor
def move_left(self):
self.rect.centerx -= self.ai_setting.ship_speed_factor
```
2. 在 `game_functions` 模块中添加 `check_keydown_events()` 和 `check_keyup_events()` 函数,用于检测按键事件,并调用飞船的移动方法。
```python
def check_keydown_events(event, ship):
if event.key == pygame.K_RIGHT:
ship.move_right()
elif event.key == pygame.K_LEFT:
ship.move_left()
def check_keyup_events(event, ship):
if event.key == pygame.K_RIGHT:
# 停止向右移动
elif event.key == pygame.K_LEFT:
# 停止向左移动
```
3. 修改 `check_event()` 函数,调用检测按键事件的函数。
```python
def check_event(ship):
for event in pygame.event.get():
if event.type == pygame.QUIT:
sys.exit()
elif event.type == pygame.KEYDOWN:
check_keydown_events(event, ship)
elif event.type == pygame.KEYUP:
check_keyup_events(event, ship)
```
4. 在 `run_game()` 函数中调用 `check_event()` 函数。
```python
def run_game():
pygame.init()
ai_setting=Settings()
screen=pygame.display.set_mode((ai_setting.screen_width,ai_setting.screen_height))
pygame.display.set_caption("alien invasion")
ship=Ship(screen,ai_setting)
while True:
gf.check_event(ship)
ship.update(screen)
gf.update_screen(ai_setting,screen,ship)
pygame.display.flip()
run_game()
```
这样就可以让飞船可以通过方向键进行左右移动了。
'Button' object has no attribute 'screen_rect'
这个错误提示表明,在Button对象中没有名为'screen_rect'的属性。可能是在创建Button对象时,没有正确地传递ai_game参数或者没有正确地设置screen属性。
可以检查初始化方法__init__()中有没有正确地设置self.screen属性,以及self.screen属性所代表的对象是否拥有get_rect()方法。如果没有,需要在初始化方法中创建一个新的屏幕(surface)对象,并设置其rect属性。
另外,也可以检查_prep_msg()方法中的代码,确保使用的是正确的属性名称。
阅读全文