1. 预览
2. 实现思路
- 实现食物类,食物坐标和刷新食物的位置,以及获取食物的坐标点;
- 实现计分面板类,实现吃食物每次的计分以及积累一定程度的等级,实现等级和分数的增加;
- 实现蛇类,蛇类分为蛇头和蛇身,蛇头有方向,蛇身每一节跟着前一节移动;
- 实现控制器类,初始化上边实现的各个类,同时绑定键盘事件,实现方向的修改;
- 使用 requestAnimationFrame 实现页面刷新,蛇移动,坐标点的更新。
3. 食物类
- 接口 Point 的实现,用于返回食物的坐标点;
- maxX 和 maxY 用于记录横向和纵向的最大坐标值;
- 实现 change 实现食物的刷新;
3.1 传入当前蛇的坐标点,用于判断刷新的点是否是蛇中间的坐标点;
3.2 使用 Math.round 和 Math.random 生成一个食物坐标点 (x,y);
3.3 过滤 snakes 蛇坐标点,看看该点是否存在蛇中;
3.4 如果存在,continue 跳出该次循环,继续生成新的坐标,走3.2,3.3流程;
3.5 不存在,就保存该坐标点,跳出循环,完成此次坐标的生成。 - 实现 getPoints,获取最新的食物坐标。
interface Point{x: number,y: number,
}class Food{// 食物坐标x: number;y: number;// 格子的最大数量maxX: number;maxY: number;constructor(maxX: number = 35, maxY: number = 35){this.maxX = maxX;this.maxY = maxY;}// 修改食物的坐标change(snakes: Point[] = []){while(true){let x = Math.round(Math.random() * (this.maxX - 1));let y = Math.round(Math.random() * (this.maxY - 1));let filters = snakes.filter(item => {if(item.x === x && item.y === y){return item;}})if(filters.length){continue}this.x = x;this.y = y;break}}// 获取食物坐标getPoints(): Point{return {x: this.x,y: this.y}}
}export default Food;
4. 计分面板类
- 初始化分数、等级、最大等级、每次升级所需要的分数;
- 分数增长 addScore 实现:
2.1 分数自增 ++this.score;
2.2 判断自增后的分数是否满足升级条件 this.score % this.upLevelScore === 0;
2.3 满足升级条件,调用升级方法 addLevel; - 等级增加 addLevel 实现:
3.1 判断当前等级是否小于最高等级;
3.2 满足条件,进行等级升级; - 实现当前等级和分数的获取 getScoreAndLevel 方法实现。
class ScorePanel{score: number = 0;level: number = 1;// 最大等级maxLevel: number;// 多少分升一级upLevelScore: number;constructor(maxLevel: number = 10, upLevelScore: number = 10){this.maxLevel = maxLevel;this.upLevelScore = upLevelScore;}// 分数增加addScore(){++this.score// 满足升级条件,升级if(this.score % this.upLevelScore === 0){this.addLevel()}}// 等级增加addLevel(){if(this.level < this.maxLevel){++this.level}}// 获取当前分数和等级getScoreAndLevel(){return {score: this.score,level: this.level}}
}
export default ScorePanel;
5. 蛇类
5.1 全局变量
- 由于蛇是一个列表,因此需要一个key的id,因此 generateId 作为id生成器;
- DIRECTION_RIGHT、DIRECTION_DOWN、DIRECTION_LEFT、DIRECTION_UP常量定义;
- 接口 Point 实现,id参数在食物时不存在,因此可以不存在。
import { generateId } from './utils';
export const DIRECTION_RIGHT = 0;
export const DIRECTION_DOWN = 1;
export const DIRECTION_LEFT = 2;
export const DIRECTION_UP = 3;interface Point{x: number,y: number,id?: string,
}
5.2 蛇头类
- 初始化蛇头坐标(x,y),方向 direction,唯一标识key的id;
- 蛇头移动函数move的实现:
2.1 方向向右【DIRECTION_RIGHT】,x坐标自增1;
2.2 方向向下【DIRECTION_DOWN】,y坐标自增1;
2.3 方向向左【DIRECTION_LEFT】,x坐标自减1;
2.4 方向向上【DIRECTION_UP】,y坐标自减1。 - 修改方向更新 setDirection
3.1 传入方向和当前方向,相同,对方向不做处理;
3.2 方向相反不做处理,比如当前方向向右,传入方向向左,此次方向不允许改变。
// 蛇头
export class SnakeHead{x: number;y: number;direction: number;id: string;constructor(direction:number, x:number, y:number){this.direction = direction || DIRECTION_RIGHT;this.x = x;this.y = y;this.id = generateId()}move(){if(this.direction == DIRECTION_RIGHT){// 向右this.x += 1} else if(this.direction == DIRECTION_DOWN){// 向下this.y += 1} else if(this.direction == DIRECTION_LEFT){// 向左this.x -= 1} else if(this.direction == DIRECTION_UP){// 向上this.y -= 1}}// 修改移动方向setDirection(direction:number){if(this.direction === direction){return;} else {if(this.direction === DIRECTION_RIGHT && direction !== DIRECTION_LEFT ||this.direction === DIRECTION_DOWN && direction !== DIRECTION_UP ||this.direction === DIRECTION_LEFT && direction !== DIRECTION_RIGHT ||this.direction === DIRECTION_UP && direction !== DIRECTION_DOWN){this.direction = direction}}}
}
5.3 蛇身类
- 初始化每节蛇身的坐标点和唯一标识;
- 实现蛇身的移动,当前坐标点是前移节的坐标。
// 蛇身
export class SnakeBody{x: number;y: number;id: string;constructor(x:number, y:number){this.x = x;this.y = y;this.id = generateId()}// 将当前位置的模块移动到前一个模块的位置move(prevItem: (SnakeHead | SnakeBody)){if(prevItem){this.x = prevItem.xthis.y = prevItem.y}}
}
5.4 蛇类
- 初始化蛇列表、蛇头、蛇身最后一节、每次吃食物蛇身的增长长度、记录当前次吃食物身体增长的长度、蛇能存在的最大坐标;
- 初始化蛇:
2.1 创建蛇的坐标点列表;
2.2 创建蛇头函数执行;
2.3 创建蛇身函数执行。 - 修改蛇的行进方向改变实现 setDirection,直接调用蛇头的修改方向方法;
- 获取两个数之间的随机值 random 方法实现;
- 创建蛇头函数 createHead 实现:
5.1 获取坐标随机值的最大值maxX的一半;
5.2 由于初始化蛇身最少三节,因此对最小值处理必须大于0;
5.3 创建蛇头 snakeHead;
5.4 将蛇头对象存放到蛇的列表中。 - 蛇身 createBodies 实现:
6.1 蛇身最少三节,因此循环产生每一节蛇身;
6.2 创建每一节蛇身,对y坐标,不做处理,使用蛇头的x坐标一次递减。 - 蛇移动函数 move 实现:
7.1 获取移动前左后一节蛇身对象;
7.2 记录最后一节蛇身对象的坐标用于吃食物后身体的增长;
7.3 由于移动防止脱节,因此从最后一节一次往前一节循环移动;
7.4 由于蛇身的移动需要获取前一节蛇身的坐标,因此移动时,传入前一节蛇身对象;
7.5 移动完成,检测当前移动后蛇头是否碰撞墙或者撞到自身。 - 撞墙检测函数 hasOver 实现:
8.1 获取蛇头坐标,看看是否超出盒子的x,y的范围; - 撞自身检测函数 hasSelf实现:
9.1 因为蛇头不可能撞到自己蛇头,因此去掉蛇头,从1开始遍历蛇身坐标;
9.2 如果存在有蛇身坐标和蛇头坐标相同,说明撞到自己,结束游戏。 - 吃掉食物判断函数 eatFood:
10.1 传入当前食物的坐标值;
10.2 判断食物坐标和蛇头坐标是否重合;
10.3 更新增长身体增长变量;
10.4 返回吃到食物未 true;
10.5 否则说明没有吃到食物,返回 false。 - 获取最新蛇的全部坐标点函数 getPoints:
11.1 返回蛇的坐标点和唯一标识id。 - 设置每次吃食物蛇的增长长度 setUpdateBodyNumber 函数实现;
- 实现蛇的增长函数 updateBody:
13.1 判断 currentUpdateBody > 0 是否满足;
13.2 添加一个最新的蛇身对象,坐标是移动前最后一节的坐标;
13.3 添加完成,增长记录变量自减1。
class Snake{// 完整蛇列表snakes: (SnakeHead | SnakeBody)[]// 蛇头snakeHead: SnakeHead;// 蛇身最后一节snakeLastBody: Point;// 每次食物身体增长长度updateBodyNumber: number;// 当前次身体增长的值currentUpdateBody: number;// 格子的最大数量maxX: number;maxY: number;constructor(maxX: number = 35, maxY: number = 35, updateBodyNumber: number = 3){this.maxX = maxX;this.maxY = maxY;this.updateBodyNumber = updateBodyNumber;this.currentUpdateBody = 0;// 初始化蛇this.init()}// 初始化蛇init(){this.snakes = []// 创建蛇头this.createHead()// 创建蛇身this.createBodies()}setDirection(direction: number){this.snakeHead.setDirection(direction)}random(n:number,m:number):number{return Math.round(Math.random() * (m - n) + n)}// 创建蛇头createHead(){let max = Math.round(this.maxX / 2);let min = max - 5 > 0 ? max - 5 : 0;this.snakeHead = new SnakeHead(DIRECTION_RIGHT, this.random(min,max), this.random(min,max))this.snakes.push(this.snakeHead)}// 创建蛇身createBodies(){for(let i = 1; i <= 3; i++){this.snakes.push(new SnakeBody(this.snakeHead.x - i, this.snakeHead.y))}}// 移动函数move(){// 移动前记录蛇身最后一节的坐标let last = this.snakes.at(-1) as SnakeBodythis.snakeLastBody = { x: last.x, y: last.y }let len:number = this.snakes.length;for(let i = len - 1; i >= 0; i--){this.snakes[i].move(this.snakes[i - 1])}// 移动完成,检测是否撞到墙和自身this.hasOver()this.hasSelf()}// 判断是否撞墙或者撞到自身hasOver(){// 获取蛇头let head:SnakeHead = this.snakeHeadif(head.x < 0 || head.x >= this.maxX || head.y < 0 || head.y >= this.maxY){throw('撞墙了!')}}// 判断是否撞到蛇自身hasSelf(){// 获取蛇头let head:SnakeHead = this.snakeHeadlet len = this.snakes.lengthfor(let i = 1; i < len; i++){let item = this.snakes[i]if(head.x === item.x && head.y === item.y){throw('撞到自己了!')}}}// 是否吃掉食物eatFood(food: Point): boolean{// 获取蛇头let head:SnakeHead = this.snakeHeadif(head.x === food.x && head.y === food.y){this.currentUpdateBody = this.updateBodyNumber;return true}return false}// 获取最新坐标点列表getPoints(): Point[]{let snakes: Point[] = this.snakes.map(item => {return {x: item.x,y: item.y,id: item.id}})return snakes}// 设置身体增长的长度setUpdateBodyNumber(bodyNumber:number){this.updateBodyNumber = bodyNumber;}// 身体增长updateBody(){if(this.currentUpdateBody > 0){this.snakes.push(new SnakeBody(this.snakeLastBody.x, this.snakeLastBody.y))this.currentUpdateBody--}}
}export default Snake;
5.5 完整蛇类代码
import { generateId } from './utils';
export const DIRECTION_RIGHT = 0;
export const DIRECTION_DOWN = 1;
export const DIRECTION_LEFT = 2;
export const DIRECTION_UP = 3;interface Point{x: number,y: number,id?: string,
}// 蛇头
export class SnakeHead{x: number;y: number;direction: number;id: string;constructor(direction:number, x:number, y:number){this.direction = direction || DIRECTION_RIGHT;this.x = x;this.y = y;this.id = generateId()}move(){if(this.direction == DIRECTION_RIGHT){// 向右this.x += 1} else if(this.direction == DIRECTION_DOWN){// 向下this.y += 1} else if(this.direction == DIRECTION_LEFT){// 向左this.x -= 1} else if(this.direction == DIRECTION_UP){// 向上this.y -= 1}}// 修改移动方向setDirection(direction:number){if(this.direction === direction){return;} else {if(this.direction === DIRECTION_RIGHT && direction !== DIRECTION_LEFT ||this.direction === DIRECTION_DOWN && direction !== DIRECTION_UP ||this.direction === DIRECTION_LEFT && direction !== DIRECTION_RIGHT ||this.direction === DIRECTION_UP && direction !== DIRECTION_DOWN){this.direction = direction}}}
}
// 蛇身
export class SnakeBody{x: number;y: number;id: string;constructor(x:number, y:number){this.x = x;this.y = y;this.id = generateId()}// 将当前位置的模块移动到前一个模块的位置move(prevItem: (SnakeHead | SnakeBody)){if(prevItem){this.x = prevItem.xthis.y = prevItem.y}}
}class Snake{// 完整蛇列表snakes: (SnakeHead | SnakeBody)[]// 蛇头snakeHead: SnakeHead;// 蛇身最后一节snakeLastBody: Point;// 每次食物身体增长长度updateBodyNumber: number;// 当前次身体增长的值currentUpdateBody: number;// 格子的最大数量maxX: number;maxY: number;constructor(maxX: number = 35, maxY: number = 35, updateBodyNumber: number = 3){this.maxX = maxX;this.maxY = maxY;this.updateBodyNumber = updateBodyNumber;this.currentUpdateBody = 0;// 初始化蛇this.init()}// 初始化蛇init(){this.snakes = []// 创建蛇头this.createHead()// 创建蛇身this.createBodies()}setDirection(direction: number){this.snakeHead.setDirection(direction)}random(n:number,m:number):number{return Math.round(Math.random() * (m - n) + n)}// 创建蛇头createHead(){let max = Math.round(this.maxX / 2);let min = max - 5 > 0 ? max - 5 : 0;this.snakeHead = new SnakeHead(DIRECTION_RIGHT, this.random(min,max), this.random(min,max))this.snakes.push(this.snakeHead)}// 创建蛇身createBodies(){for(let i = 1; i <= 3; i++){this.snakes.push(new SnakeBody(this.snakeHead.x - i, this.snakeHead.y))}}// 移动函数move(){// 移动前记录蛇身最后一节的坐标let last = this.snakes.at(-1) as SnakeBodythis.snakeLastBody = { x: last.x, y: last.y }let len:number = this.snakes.length;for(let i = len - 1; i >= 0; i--){this.snakes[i].move(this.snakes[i - 1])}// 移动完成,检测是否撞到墙和自身this.hasOver()this.hasSelf()}// 判断是否撞墙或者撞到自身hasOver(){// 获取蛇头let head:SnakeHead = this.snakeHeadif(head.x < 0 || head.x >= this.maxX || head.y < 0 || head.y >= this.maxY){throw('撞墙了!')}}// 判断是否撞到蛇自身hasSelf(){// 获取蛇头let head:SnakeHead = this.snakeHeadlet len = this.snakes.lengthfor(let i = 1; i < len; i++){let item = this.snakes[i]if(head.x === item.x && head.y === item.y){throw('撞到自己了!')}}}// 是否吃掉食物eatFood(food: Point): boolean{// 获取蛇头let head:SnakeHead = this.snakeHeadif(head.x === food.x && head.y === food.y){this.currentUpdateBody = this.updateBodyNumber;return true}return false}// 获取最新坐标点列表getPoints(): Point[]{let snakes: Point[] = this.snakes.map(item => {return {x: item.x,y: item.y,id: item.id}})return snakes}// 设置身体增长的长度setUpdateBodyNumber(bodyNumber:number){this.updateBodyNumber = bodyNumber;}// 身体增长updateBody(){if(this.currentUpdateBody > 0){this.snakes.push(new SnakeBody(this.snakeLastBody.x, this.snakeLastBody.y))this.currentUpdateBody--}}
}export default Snake;
6. 控制器类
- 初始化食物、蛇、计分面板;
- 获取初始化时蛇的坐标列表;
- 调用食物刷新方法,刷新食物坐标;
- 绑定键盘事件:
4.1 key 是 ArrowDown,调用 this.snake.setDirection(DIRECTION_DOWN);
4.2 key 是 ArrowLeft,调用 this.snake.setDirection(DIRECTION_LEFT);
4.3 key 是 ArrowUp,调用 this.snake.setDirection(DIRECTION_UP);
4.4 key 是 ArrowRight,调用 this.snake.setDirection(DIRECTION_RIGHT)。
import Food from "./Food";
import Snake, {DIRECTION_RIGHT,DIRECTION_LEFT,DIRECTION_UP,DIRECTION_DOWN,
} from "./Snake";
import ScorePanel from './ScorePanel';interface Point{x: number,y: number
}class GameContral{// 食物food: Food;// 蛇snake: Snake;// 计分面板scorePanel: ScorePanel;// 格子数cell: number;constructor(cell: number = 15){this.cell = cell;// 初始化this.init()}// 初始化init(){// 初始化蛇this.snake = new Snake(this.cell, this.cell);// 初始化食物this.food = new Food(this.cell, this.cell);// 初始化食物位置let points: Point[] = this.snake.getPoints()this.food.change(points)// 初始化计分面板this.scorePanel = new ScorePanel();// 绑定键盘事件document.addEventListener('keydown', this.keyboardHandler.bind(this))}// 键盘操作keyboardHandler(event: KeyboardEvent){let key:string = event.key;switch(key){case 'ArrowDown':this.snake.setDirection(DIRECTION_DOWN)break;case 'ArrowLeft':this.snake.setDirection(DIRECTION_LEFT)break;case 'ArrowUp':this.snake.setDirection(DIRECTION_UP)break;case 'ArrowRight':this.snake.setDirection(DIRECTION_RIGHT)break;default:this.snake.setDirection(DIRECTION_RIGHT)break;}}
}export default GameContral;
7. 界面实现
7.1 接口实现
- 坐标点接口 Point、计分和等级接口 Score、页面渲染数据接口 State、逻辑处理接口 RefData 实现;
interface Point{x: number,y: number,id?: string,
}
interface Score{score: number,level: number
}interface State{isStart: boolean,snakes: Point[],food: Point,cells: number,scorePanel: Score
}
interface RefData{gameContral: GameContral,food: Food,snake: Snake,isFirst: boolean
}
7.2 逻辑变量和渲染变量初始化
- foodAndSnake 存储食物类对象、蛇对象、控制器对象,是否第一次执行等做逻辑处理,不需要界面渲染;
- data 存储是否开始,蛇身坐标列表、食物坐标、计分面板,用于页面渲染,数据都是重新筛选后,不存在多于数据。
let foodAndSnake = useRef<RefData>({gameContral: new GameContral(),food: new Food(),snake: new Snake(),isFirst: true})// 格子数量let [data, setData] = useSetState<State>({isStart: false,snakes: [],food: {x: 0, y: 0},cells: 30,scorePanel: {score: 0, level: 1}})
7.3 初始化
- useEffect 监听 onmount 的时候,初始化页面;
- init 初始化各个类对象:
2.1 初始化 GameContral 游戏控制器类;
2.2 赋值食物类对象;
2.3 赋值蛇类对象; - 更新食物坐标、蛇坐标、计分面板
3.1 获取最新的蛇坐标列表;
3.2 获取最新的食物坐标;
3.3 获取最新的计分面板信息。
// 初始化食物和蛇得数据useEffect(() => {init()},[])// 初始化function init(){let gameContral = new GameContral(30)foodAndSnake.current.gameContral = gameContral;foodAndSnake.current.food = gameContral.food;foodAndSnake.current.snake = gameContral.snake;setPoints()}// 获取食物和蛇得坐标function setPoints(){// 获取蛇的最新坐标let snakes: Point[] = foodAndSnake.current.snake.getPoints()// 获取食物的最新坐标let food: Point = foodAndSnake.current.food.getPoints()// 获取计分面板的最新分数和等级let scorePanel: Score = foodAndSnake.current.gameContral.scorePanel.getScoreAndLevel()setData({ snakes, food, scorePanel })}
7.4 监听动画实现
- 对蛇进行移动,调用蛇对象的移动函数;
- 调用蛇对象的 eatFood 判断是否吃食物;
- 吃了食物,进行刷新;
- 如果吃了食物,进行加分;
- 更新身体长度;
- 更新蛇坐标列表,食物坐标,计分面板信息;
- 如果上边流程出现异常报错,直接结束游戏,游戏结束的逻辑在异常处处理;
- 随着等级的提升,速度越来越快。【300 - (data.scorePanel.level - 1) * 30】
// 监听刷新界面useAnimationFrame(() => {try {// 对蛇进行移动foodAndSnake.current.snake.move()// 判断是否吃食物let isEating: boolean = foodAndSnake.current.snake.eatFood(data.food)if(isEating){// 吃了食物,进行刷新foodAndSnake.current.food.change(foodAndSnake.current.snake.getPoints())// 如果吃了食物,进行加分foodAndSnake.current.gameContral.scorePanel.addScore()}// 更新身体长度foodAndSnake.current.snake.updateBody()setPoints()} catch (error) {setData({isStart: false})console.log('error',error)}},data.isStart,{delay: 300 - (data.scorePanel.level - 1) * 30})
7.5 useAnimationFrame 实现
import { useMemoizedFn } from '../useMemoizedFn'
import { useRef, useCallback, useEffect } from 'react'
import { isObject, isNumber } from '../utils'interface Options {immediate?: boolean,delay: number
}export function useAnimationFrame(fn: () => void, running?: boolean, options: Options = {delay: 0}){const timerCallback = useMemoizedFn(fn)const requestId = useRef<number>(0)const handleTime = useRef<number>(Date.now())const clear = useCallback(() => {if (requestId.current) {cancelAnimationFrame(requestId.current)}}, []);const tick = useCallback(() => {if(isObject(options) && isNumber(options.delay) && options.delay){let current = Date.now()if(current - handleTime.current > options.delay){handleTime.current = currenttimerCallback()}} else {timerCallback()}if(running){requestId.current = requestAnimationFrame(tick)}},[running, options.delay])useEffect(() => {if (!running) {return}handleTime.current = Date.now()requestId.current = requestAnimationFrame(tick)return clear}, [running, options.delay])return clear
}
7.6 蛇和食物的绘制
- 不同屏幕的计算函数 handleSize;
- 食物绘制函数 drawFood 实现,通过食物坐标进行定位;
- 蛇列表绘制函数 drawSnake 实现,根据蛇列表循环计算坐标点。
// 计算对应屏幕的尺寸function handleSize(size: number):number{let windowWidth = window.innerWidth > 750 ? 750 : window.innerWidth;return (windowWidth / 750) * size;}// 绘制食物function drawFood():JSX.Element{return <View style={`top:${handleSize(data.food.y * 20)}px;left:${handleSize(data.food.x * 20)}px;`}className='rui-snake-food'></View>}// 绘制蛇function drawSnake():JSX.Element[]{return data.snakes.map(item => <View key={item.id}id={item.id}style={`top:${handleSize(item.y * 20)}px;left:${handleSize(item.x * 20)}px;`}className='rui-snake-body'></View>)}
7.7 界面布局
<View className='rui-snake-container'><View className='rui-stage-content'>{/* 食物 */}{drawFood()}{/* 蛇 */}{drawSnake()}</View><View className='rui-score-panel'><View>SCORE: <Text>{data.scorePanel.score}</Text></View><View>LEVEL: <Text>{data.scorePanel.level}</Text></View></View><View className='rui-handle-panel'><View onClick={resetStart}>开始</View></View></View>
7.8 界面完整代码
import { View, Text } from '@tarojs/components';
import React, { useEffect, useRef } from "react";
import { useAnimationFrame, useSetState } from '../../utils/hooks'
import Food from './modules/Food'
import Snake from './modules/Snake'
import GameContral from './modules/GameContral'
import './index.scss';interface Point{x: number,y: number,id?: string,
}
interface Score{score: number,level: number
}interface State{isStart: boolean,snakes: Point[],food: Point,cells: number,scorePanel: Score
}
interface RefData{gameContral: GameContral,food: Food,snake: Snake,isFirst: boolean
}const SnakeGame = () => {let foodAndSnake = useRef<RefData>({gameContral: new GameContral(),food: new Food(),snake: new Snake(),isFirst: true})// 格子数量let [data, setData] = useSetState<State>({isStart: false,snakes: [],food: {x: 0, y: 0},cells: 30,scorePanel: {score: 0, level: 1}})// 初始化食物和蛇得数据useEffect(() => {init()},[])// 监听刷新界面useAnimationFrame(() => {try {// 对蛇进行移动foodAndSnake.current.snake.move()// 判断是否吃食物let isEating: boolean = foodAndSnake.current.snake.eatFood(data.food)if(isEating){// 吃了食物,进行刷新foodAndSnake.current.food.change(foodAndSnake.current.snake.getPoints())// 如果吃了食物,进行加分foodAndSnake.current.gameContral.scorePanel.addScore()}// 更新身体长度foodAndSnake.current.snake.updateBody()setPoints()} catch (error) {setData({isStart: false})console.log('error',error)}},data.isStart,{delay: 300 - (data.scorePanel.level - 1) * 30})// 重新开始function resetStart(){// 是否是第一次点击开始,是就不进行初始化,否则初始化面板if(foodAndSnake.current.isFirst){foodAndSnake.current.isFirst = false} else {init()}setData({isStart: true})}// 初始化function init(){let gameContral = new GameContral(30)foodAndSnake.current.gameContral = gameContral;foodAndSnake.current.food = gameContral.food;foodAndSnake.current.snake = gameContral.snake;setPoints()}// 获取食物和蛇得坐标function setPoints(){// 获取蛇的最新坐标let snakes: Point[] = foodAndSnake.current.snake.getPoints()// 获取食物的最新坐标let food: Point = foodAndSnake.current.food.getPoints()// 获取计分面板的最新分数和等级let scorePanel: Score = foodAndSnake.current.gameContral.scorePanel.getScoreAndLevel()setData({ snakes, food, scorePanel })}// 计算对应屏幕的尺寸function handleSize(size: number):number{let windowWidth = window.innerWidth > 750 ? 750 : window.innerWidth;return (windowWidth / 750) * size;}// 绘制食物function drawFood():JSX.Element{return <View style={`top:${handleSize(data.food.y * 20)}px;left:${handleSize(data.food.x * 20)}px;`}className='rui-snake-food'></View>}// 绘制蛇function drawSnake():JSX.Element[]{return data.snakes.map(item => <View key={item.id}id={item.id}style={`top:${handleSize(item.y * 20)}px;left:${handleSize(item.x * 20)}px;`}className='rui-snake-body'></View>)}return (<View className='rui-snake-container'><View className='rui-stage-content'>{/* 食物 */}{drawFood()}{/* 蛇 */}{drawSnake()}</View><View className='rui-score-panel'><View>SCORE: <Text>{data.scorePanel.score}</Text></View><View>LEVEL: <Text>{data.scorePanel.level}</Text></View></View><View className='rui-handle-panel'><View onClick={resetStart}>开始</View></View></View>)
}
export default SnakeGame;
8. SCSS 样式实现
// 基础颜色变量
$bg-color: #b7d4a8;
$border-color: #000000;
$head-color: lightgreen;
$body-color: red;
$food-color: red;*{margin: 0;padding: 0;box-sizing: border-box;
}.rui-snake-container{box-sizing: border-box;width: 100vw;height: 100vh;background-color: $bg-color;border: 10px solid $border-color;display: flex;flex-direction: column;justify-content: space-around;align-items: center;.rui-stage-content{width: 704px;height: 704px;border: 2px solid $border-color;position: relative;.rui-snake-body{width: 20px;height: 20px;border: 1px solid $bg-color;background-color: $border-color;position: absolute;}.rui-snake-food{width: 20px;height: 20px;overflow: hidden;position: absolute;// transform: rotate(45deg);border: 1px solid $bg-color;background-color: $food-color;display: flex;flex-wrap: wrap;justify-content: space-between;align-content: space-between;.rui-food-li{width: 8px;height: 8px;background-color: $border-color;}}.rui-snake-row{display: flex;align-items: center;.rui-snake-cell{width: 20px;height: 20px;flex: none;}}}.rui-score-panel{width: 700px;font: 30px '微软雅黑';display: flex;justify-content: space-between;align-items: center;}.rui-handle-panel{width: 600px;font: 30px '微软雅黑';text-align: center;}
}
9. 总结
- 最开准备使用 30 * 30 个格子,进行判断渲染,渲染数据每次更改太多,渲染时间很久,因此不建议使用;
- 为什么每次设置渲染数据都要筛选一次,因为直接将类渲染,数据随着蛇成长,会越来越大,很卡。