"""
坦克大战的需求
1.项目中有那些类
2.类中有哪些方法

1.坦克类
  射击
  移动类
  显示坦克的方法
2.子弹类
  移动
  显示子弹的方法
3.墙壁类
  属性： 是否可以通过
4.爆炸效果类
  显示爆炸效果
5.音效类
  播放音乐
6.主类
  开始游戏
  结束游戏

新增功能：加载主窗口
"""

#导入pygame模块,time模块,random模块
import pygame,time,random
BG_COLOR=pygame.Color(255,255,255)
TEXT_COlOR = pygame.Color(255,0,0)
SCREEN_HEIGHT=500
SCREEN_WIDTH=700

#主类
class mainGame():
    window=None
    my_tank=None
    enemyTankList=[]
    enemyTankCount=5
    def __init__(self):
        pass
    #开始游戏
    def startGame(self):
        #初始化窗口
        pygame.display.init()
        #设置窗口的大小以及显示
        mainGame.window = pygame.display.set_mode([SCREEN_WIDTH,SCREEN_HEIGHT])
        #初始化我方坦克
        mainGame.my_tank=tank(SCREEN_WIDTH/2,SCREEN_HEIGHT/2)
        self.creatEnemyTank()
        pygame.display.set_caption("坦克大战1.0")
        while True:
            time.sleep(0.02)
            #设置窗口的填充色
            mainGame.window.fill(BG_COLOR)
            self.getEvent()
            mainGame.window.blit(self.getTextFont("剩余坦克数量{}".format(6)),(10,10))
            #调用坦克显示的方法
            mainGame.my_tank.displayTank()
            self.blitEnemyTank()
            if not mainGame.my_tank.stop:
                mainGame.my_tank.move()
            pygame.display.update()
    def creatEnemyTank(self):
        top = 100
        for i in range(5):
            left = random.randint(0,600)
            speed = random.randint(1,7)
            enemy=enemytank(left,top,speed)
            mainGame.enemyTankList.append(enemy)

    def blitEnemyTank(self):
        for enemytank in mainGame.enemyTankList:
            enemytank.displayTank()
    def endGame(self):
        print("谢谢使用")
        exit()

    def getEvent(self):
        eventList = pygame.event.get()
        #遍历事件
        for event in eventList:
            if event.type == pygame.QUIT:
                self.endGame()
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_LEFT:
                    mainGame.my_tank.direction = "L"
                    mainGame.my_tank.stop = False
                    #mainGame.my_tank.move()
                    print("按下左键，坦克向左移动")
                elif event.key == pygame.K_RIGHT:
                        mainGame.my_tank.direction = "R"
                        mainGame.my_tank.stop = False
                        # mainGame.my_tank.move()
                        print("按下右键，坦克向右移动")
                elif event.key == pygame.K_UP:
                    mainGame.my_tank.direction = "U"
                    mainGame.my_tank.stop = False
                    #mainGame.my_tank.move()
                    print("按下上键，坦克向上移动")
                elif event.key == pygame.K_DOWN:
                    mainGame.my_tank.direction = "D"
                    mainGame.my_tank.stop = False
                   #mainGame.my_tank.move()
                    print("按下下键，坦克向下移动")
                elif event.key == pygame.K_SPACE:
                    print("发射子弹")

            if event.type == pygame.KEYUP:
                if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT or event.key == pygame.K_UP or event.key == pygame.K_DOWN:
                    mainGame.my_tank.stop = True

    def getTextFont(self,text):
        pygame.font.init()
        font = pygame.font.SysFont('华文行楷',18)
        text_surface=font.render(text,True,TEXT_COlOR)
        return text_surface

class tank():
    #添加具体位置
    def __init__(self,left,top):
        #保存加载的图片
        self.imags={
            "U":pygame.image.load("imags/p1tankU.gif"),
            "D":pygame.image.load("imags/p1tankD.gif"),
            "L": pygame.image.load("imags/p1tankL.gif"),
            "R": pygame.image.load("imags/p1tankR.gif")
        }
        #方向
        self.direction = "U"
        #根据图片的方向获取图片
        self.image = self.imags[self.direction]
        #根据图片获取矩形区域
        self.rect = self.image.get_rect()
        self.rect.left = left
        self.rect.top = top
        #速度决定快慢
        self.speed = 5
        #坦克移动的开关
        self.stop = True

    def move(self):
        if self.direction == "U":
            if self.rect.top>0:
                self.rect.top -= self.speed
        elif self.direction == "D":
            if self.rect.top+self.rect.height<SCREEN_HEIGHT:
                self.rect.top += self.speed
        elif self.direction == "R":
            if self.rect.left+self.rect.height<SCREEN_WIDTH:
                self.rect.left += self.speed
        elif self.direction == "L":
            if self.rect.left>0:
                self.rect.left -= self.speed

    def shot(self):
        pass

    def displayTank(self):
        #调用blit方法展示
        self.image = self.imags[self.direction]
        mainGame.window.blit(self.image,self.rect)

class enemytank(tank):
    def __init__(self,left,top,speed):
        self.imags={
            "U":pygame.image.load("imags/enemytankU.gif"),
            "D": pygame.image.load("imags/enemytankD.gif"),
            "L": pygame.image.load("imags/enemytankL.gif"),
            "R": pygame.image.load("imags/enemytankR.gif")
        }

        self.direction = self.randomDirection()
        self.image = self.imags[self.direction]
        self.rect = self.image.get_rect()
        self.left = left
        self.top = top
        self.speed = speed
        self.flag = True
    def randomDirection(self):
        a = random.randint(1,4)
        if a == 1:
            return "U"
        elif a == 2:
            return "D"
        elif a== 3:
            return "L"
        elif a== 4:
            return "R"


if __name__=="__main__":
    mainGame().startGame()

老师，不知到为什么我的地方坦克一直显示在左上角，而且一直只有一个