基于Canvas制作的动态时钟demo，供大家参考，具体内容如下
动态时钟
lattice.js
lattice =
[
[
[0,0,1,1,1,0,0],
[0,1,1,0,1,1,0],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[0,1,1,0,1,1,0],
[0,0,1,1,1,0,0]
],//0
[
[0,0,0,1,1,0,0],
[0,1,1,1,1,0,0],
[0,0,0,1,1,0,0],
[0,0,0,1,1,0,0],
[0,0,0,1,1,0,0],
[0,0,0,1,1,0,0],
[0,0,0,1,1,0,0],
[0,0,0,1,1,0,0],
[0,0,0,1,1,0,0],
[1,1,1,1,1,1,1]
],//1
[
[0,1,1,1,1,1,0],
[1,1,0,0,0,1,1],
[0,0,0,0,0,1,1],
[0,0,0,0,1,1,0],
[0,0,0,1,1,0,0],
[0,0,1,1,0,0,0],
[0,1,1,0,0,0,0],
[1,1,0,0,0,0,0],
[1,1,0,0,0,1,1],
[1,1,1,1,1,1,1]
],//2
[
[1,1,1,1,1,1,1],
[0,0,0,0,0,1,1],
[0,0,0,0,1,1,0],
[0,0,0,1,1,0,0],
[0,0,1,1,1,0,0],
[0,0,0,0,1,1,0],
[0,0,0,0,0,1,1],
[0,0,0,0,0,1,1],
[1,1,0,0,0,1,1],
[0,1,1,1,1,1,0]
],//3
[
[0,0,0,0,1,1,0],
[0,0,0,1,1,1,0],
[0,0,1,1,1,1,0],
[0,1,1,0,1,1,0],
[1,1,0,0,1,1,0],
[1,1,1,1,1,1,1],
[0,0,0,0,1,1,0],
[0,0,0,0,1,1,0],
[0,0,0,0,1,1,0],
[0,0,0,1,1,1,1]
],//4
[
[1,1,1,1,1,1,1],
[1,1,0,0,0,0,0],
[1,1,0,0,0,0,0],
[1,1,1,1,1,1,0],
[0,0,0,0,0,1,1],
[0,0,0,0,0,1,1],
[0,0,0,0,0,1,1],
[0,0,0,0,0,1,1],
[1,1,0,0,0,1,1],
[0,1,1,1,1,1,0]
],//5
[
[0,0,0,0,1,1,0],
[0,0,1,1,0,0,0],
[0,1,1,0,0,0,0],
[1,1,0,0,0,0,0],
[1,1,0,1,1,1,0],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[0,1,1,1,1,1,0]
],//6
[
[1,1,1,1,1,1,1],
[1,1,0,0,0,1,1],
[0,0,0,0,1,1,0],
[0,0,0,0,1,1,0],
[0,0,0,1,1,0,0],
[0,0,0,1,1,0,0],
[0,0,1,1,0,0,0],
[0,0,1,1,0,0,0],
[0,0,1,1,0,0,0],
[0,0,1,1,0,0,0]
],//7
[
[0,1,1,1,1,1,0],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[0,1,1,1,1,1,0],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[0,1,1,1,1,1,0]
],//8
[
[0,1,1,1,1,1,0],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[1,1,0,0,0,1,1],
[0,1,1,1,0,1,1],
[0,0,0,0,0,1,1],
[0,0,0,0,0,1,1],
[0,0,0,0,1,1,0],
[0,0,0,1,1,0,0],
[0,1,1,0,0,0,0]
],//9
[
[0,0,0,0],
[0,0,0,0],
[0,1,1,0],
[0,1,1,0],
[0,0,0,0],
[0,0,0,0],
[0,1,1,0],
[0,1,1,0],
[0,0,0,0],
[0,0,0,0]
]//:
];
script.js
var CANVAS_WIDTH;
var CANVAS_HEIGHT = 600;
//设置点阵中圆的半径
var RADIUS = 8;
//设置时钟距离边框的位置
var MARGIN_LEFT = 100;
var MARGIN_TOP = 40;
//获取初始状态的时间
var time = new Date();
var hours = time.getHours();
var minutes = time.getMinutes();
var seconds = time.getSeconds();
//用于存储小球对象
var balls = [];
//小球颜色
var colors = ["red","orenge","yellow","green","blue","purple","pink"]
window.onload = function(){
//获得canvas外部盒子的宽度，使canvas与外部盒子宽度相同
var canvasBox = document.getElementById("canvasBox");
var boxWidth = getComputedStyle(canvasBox,null);
CANVAS_WIDTH = parseInt(boxWidth.width);
//设置canvas宽高并获得画笔对象
var canvas = document.getElementById("canvas");
canvas.width = CANVAS_WIDTH;
canvas.height = CANVAS_HEIGHT;
var context = canvas.getContext("2d");
//定时调用，50毫秒调用一次
setInterval(function(){
//绘制函数
draw(context);
},50);
function draw(ctx){
//刷新屏幕
ctx.clearRect(0,0,CANVAS_WIDTH,CANVAS_HEIGHT);
//获取当前时间
var curTime = new Date();
var curHours = curTime.getHours();
var curMinutes = curTime.getMinutes();
var curSeconds = curTime.getSeconds();
//画小时
drawLattice(MARGIN_LEFT,MARGIN_TOP,parseInt(curHours/10),ctx);
drawLattice(MARGIN_LEFT+15*(RADIUS+1),MARGIN_TOP,parseInt(curHours%10),ctx);
//画冒号
drawLattice(MARGIN_LEFT+30*(RADIUS+1),MARGIN_TOP,10,ctx);
//画分钟
drawLattice(MARGIN_LEFT+39*(RADIUS+1),MARGIN_TOP,parseInt(curMinutes/10),ctx);
drawLattice(MARGIN_LEFT+54*(RADIUS+1),MARGIN_TOP,parseInt(curMinutes%10),ctx);
//画冒号
drawLattice(MARGIN_LEFT+69*(RADIUS+1),MARGIN_TOP,10,ctx);
//画秒
drawLattice(MARGIN_LEFT+78*(RADIUS+1),MARGIN_TOP,parseInt(curSeconds/10),ctx);
drawLattice(MARGIN_LEFT+93*(RADIUS+1),MARGIN_TOP,parseInt(curSeconds%10),ctx);
//更新时间并绘制小球
update(context,curHours,curMinutes,curSeconds);
//观察小球数量
//console.log(balls.length);
}
//参数：
//x：绘制数字点阵的左上角的横坐标
//y：绘制数字点阵的左上角的纵坐标
//num：要绘制的数字，实际上是lattice的索引，10表示冒号
//ctx：画笔
function drawLattice(x,y,num,ctx){
for(var i=0;i=CANVAS_HEIGHT-RADIUS){
balls[i].y=CANVAS_HEIGHT-RADIUS;
//模拟碰撞反弹和阻力
balls[i].vy=-balls[i].vy*0.6;
}
}
//当小球滚出画布便可以从数组中删除，以下是删除算法
//储存应当保留的小球的数量
var numBall = 0;
for(var i=0;i0&&balls[i].x-RADIUSnumBall){
balls.pop();
}
}
};
效果图：
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。