直接Vue上代码
<template><div><div>贪吃蛇</div><canvas id="canvas" width="400" height="400"></canvas></div>
</template><script>
export default {data() {return {ctx: null,interval: null,snakeData: [],count: 0,//步数pointList: [{ x: 36, y: 18 }],//默认点direction: "d", // 默认右,w:上,s:下,a:左,d:右controll: null,//监听controll2: null,//监听speedCount: 0, // 渲染倍数speed: 8 // 渲染倍数分子};},mounted() {// 贪吃蛇，canvasconst canvas = document.getElementById("canvas");this.ctx = canvas.getContext("2d"); // 获取绘制上下文const list = [];for (let i = 0; i < 2; i++) {list.push({x: 0 + i * 6,y: 0,type: "right"});}this.snakeData = list;console.log("snakeData", this.snakeData);this.setView(list);this.controll = new AbortController();this.controll2 = new AbortController();window.addEventListener("keydown",val => {if (val.key === "w" ||val.key === "a" ||val.key === "s" ||val.key === "d") {// 方向不能相反switch (val.key) {case "w":if (this.direction !== "s") {this.direction = "w";this.speed = 4;}break;case "a":if (this.direction !== "d") {this.direction = "a";this.speed = 4;}break;case "s":if (this.direction !== "w") {this.direction = "s";this.speed = 4;}break;case "d":if (this.direction !== "a") {this.direction = "d";this.speed = 4;}break;default:console.log("方向不合法或无效按键");break;}}},{ signal: this.controll.signal });window.addEventListener("keyup",val => {if (val.key === "w" ||val.key === "a" ||val.key === "s" ||val.key === "d") {this.speed = 8;}},{ signal: this.controll2.signal });this.count = 0;this.intervalFun();},beforeDestroy() {this.count = 0;this.interval && cancelAnimationFrame(this.interval);this.controll.abort();this.controll2.abort();},methods: {intervalFun() {this.count++;this.speedCount++;// 默认向右移动if (this.count > 5000) {// clearInterval(this.interval);cancelAnimationFrame(this.interval);} else {if (this.speedCount % this.speed === 0) {// 速度缩减10倍，执行10次才渲染1次const w = canvas.clientWidth;const h = canvas.clientHeight;this.ctx.clearRect(0, 0, w, h);this.goForword(this.snakeData);}}this.interval = requestAnimationFrame(this.intervalFun);},goForword(list) {// console.log("list1", list);const option = { ...list[list.length - 1] };if (this.direction === "d") {option.x = Number(option.x) + 6;} else if (this.direction === "a") {option.x = Number(option.x) - 6;} else if (this.direction === "w") {option.y = Number(option.y) - 6;} else if (this.direction === "s") {option.y = Number(option.y) + 6;}list.push(option);let flag = false;// console.log("option", option);this.pointList = this.pointList.filter(item => {if (option.x === item.x && option.y === item.y) {flag = true;}return item.x !== option.x || item.y !== option.y;});if (!flag) {list.shift();} else {// 重新生成点const x = Math.floor(Math.random() * Math.round(400 / 6)) * 6;const y = Math.floor(Math.random() * Math.round(400 / 6)) * 6;this.pointList.push({x,y});}this.snakeData = list;// console.log("snakeData", this.snakeData);this.setView(this.snakeData); // 画蛇this.setView(this.pointList); // 画点},setView(list) {// this.ctx.clearRact(0, 0, 400, 400);this.ctx.beginPath();for (let i = 0; i < list.length; i++) {this.ctx.rect(list[i].x, list[i].y, 6, 6); // 绘制矩形}this.ctx.fill(); // 描边一个矩形轮廓}}
}
</script>
<style lang="scss" scoped>#canvas {border: 1px solid #dee2ed;
}
</style>
直接拿着用即可
