上一篇文章為:→3.10.7打飛機(jī)代碼：優(yōu)化代碼

打飛機(jī)代碼：讓敵機(jī)移動(dòng)

#coding=utf-8
import time
import random
import pygame
from pygame.locals import *


class HeroPlane(object):

    def __init__(self,screen):

        #設(shè)置飛機(jī)默認(rèn)的位置
        self.x = 230
        self.y = 600

        #設(shè)置要顯示內(nèi)容的窗口
        self.screen = screen

        self.imageName = "./feiji/hero.gif"
        self.image = pygame.image.load(self.imageName).convert()

        #用來(lái)存儲(chǔ)英雄飛機(jī)發(fā)射的所有子彈
        self.bulletList = []

    def display(self):
        #更新飛機(jī)的位置
        self.screen.blit(self.image,(self.x,self.y))

        #判斷一下子彈的位置是否越界，如果是，那么就要?jiǎng)h除這顆子彈
        #
        #這種方法會(huì)漏掉很多需要?jiǎng)h除的數(shù)據(jù)
        # for i in self.bulletList:
        #     if i.y<0:
        #         self.bulletList.remove(i)

        #存放需要?jiǎng)h除的對(duì)象信息
        needDelItemList = []

        for i in self.bulletList:
            if i.judge():
                needDelItemList.append(i)

        for i in needDelItemList:
            self.bulletList.remove(i)

        # del needDelItemList

        #更新及這架飛機(jī)發(fā)射出的所有子彈的位置
        for bullet in self.bulletList:
            bullet.display()
            bullet.move()

        #修改所有子彈的位置
        # for bullet in self.bulletList:
        #     bullet.y -= 2

    def moveLeft(self):
        self.x -= 10

    def moveRight(self):
        self.x += 10

    def sheBullet(self):
        newBullet = Bullet(self.x,self.y,self.screen)
        self.bulletList.append(newBullet)

class Bullet(object):
    def __init__(self,x,y,screen):
        self.x = x+40
        self.y = y-20
        self.screen = screen
        self.image = pygame.image.load("./feiji/bullet-3.gif").convert()

    def move(self):
        self.y -= 2

    def display(self):
        self.screen.blit(self.image,(self.x,self.y))

    def judge(self):
        if self.y<0:
            return True
        else:
            return False

class EnemyPlane(object):

    def __init__(self,screen):

        #設(shè)置飛機(jī)默認(rèn)的位置
        self.x = 0
        self.y = 0

        #設(shè)置要顯示內(nèi)容的窗口
        self.screen = screen

        self.imageName = "./feiji/enemy-1.gif"
        self.image = pygame.image.load(self.imageName).convert()

        #用來(lái)存儲(chǔ)敵人飛機(jī)發(fā)射的所有子彈
        self.bulletList = []

        self.direction = "right"

    def display(self):
        #更新飛機(jī)的位置
        self.screen.blit(self.image,(self.x,self.y))

        #判斷一下子彈的位置是否越界，如果是，那么就要?jiǎng)h除這顆子彈
        #
        #這種方法會(huì)漏掉很多需要?jiǎng)h除的數(shù)據(jù)
        # for i in self.bulletList:
        #     if i.y<0:
        #         self.bulletList.remove(i)

        #存放需要?jiǎng)h除的對(duì)象信息
        needDelItemList = []

        for i in self.bulletList:
            if i.judge():
                needDelItemList.append(i)
        for i in needDelItemList:
            self.bulletList.remove(i)

        # del needDelItemList

        #更新及這架飛機(jī)發(fā)射出的所有子彈的位置
        for bullet in self.bulletList:
            bullet.display()
            bullet.move()


    def move(self):

        #如果碰到了右邊的邊界，那么就往左走，如果碰到了左邊的邊界，那么就往右走
        if self.direction == "right":
            self.x += 2
        elif self.direction == "left":
            self.x -= 2

        if self.x>480-50:
            self.direction = "left"
        elif self.x<0:
            self.direction = "right"


if __name__ == "__main__":

    #1. 創(chuàng)建一個(gè)窗口，用來(lái)顯示內(nèi)容
    screen = pygame.display.set_mode((480,890),0,32)

    #2. 創(chuàng)建一個(gè)和窗口大小的圖片，用來(lái)充當(dāng)背景
    background = pygame.image.load("./feiji/background.png").convert()

    #3. 創(chuàng)建一個(gè)飛機(jī)對(duì)象
    heroPlane = HeroPlane(screen)

    #4. 創(chuàng)建一個(gè)敵人飛機(jī)
    enemyPlane = EnemyPlane(screen)

    #3. 把背景圖片放到窗口中顯示
    while True:
        screen.blit(background,(0,0))

        heroPlane.display()

        enemyPlane.move()
        enemyPlane.display()

        #判斷是否是點(diǎn)擊了退出按鈕
        for event in pygame.event.get():
            # print(event.type)
            if event.type == QUIT:
                print("exit")
                exit()
            elif event.type == KEYDOWN:
                if event.key == K_a or event.key == K_LEFT:
                    print('left')
                    heroPlane.moveLeft()
                    #控制飛機(jī)讓其向左移動(dòng)
                elif event.key == K_d or event.key == K_RIGHT:
                    print('right')
                    heroPlane.moveRight()
                elif event.key == K_SPACE:
                    print("space")
                    heroPlane.sheBullet()

        #通過延時(shí)的方式，來(lái)降低這個(gè)while循環(huán)的循環(huán)速度，從而降低了cpu占用率
        time.sleep(0.01)

        pygame.display.update()

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