• 电子钟

    前端网  

    电子钟

    实时报时

    html和css部分

    <style>
        #canvas2{
            position: absolute;
            top: 8px;
            left: 8px;
            z-index: 100;
        }
    </style>
</head>
<body>
<canvas id="canvas" style='display: block;border:1px solid #333;'>
    
</canvas>
<canvas id="canvas2" style='display: block;border:1px solid #333;'>
    
</canvas>
    <script>
var digit=[
    [
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [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],
        [1,1,0,0,0,1,1],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1]    
    ],//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],
        [0,1,1,1,1,1,1]    
    ],//1
    [
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [0,0,0,0,0,1,1],
        [0,0,0,0,0,1,1],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [1,1,0,0,0,0,0],
        [1,1,0,0,0,0,0],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1]    
    ],//2
    [
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [0,0,0,0,0,1,1],
        [0,0,0,0,0,1,1],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [0,0,0,0,0,1,1],
        [0,0,0,0,0,1,1],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1]    
    ],//3
    [
        [1,1,0,1,1,0,0],
        [1,1,0,1,1,0,0],
        [1,1,0,1,1,0,0],
        [1,1,0,1,1,0,0],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [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]
    ],//4
    [
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [1,1,0,0,0,0,0],
        [1,1,0,0,0,0,0],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [0,0,0,0,0,1,1],
        [0,0,0,0,0,1,1],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1]    
    ],//5
    [
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [1,1,0,0,0,0,0],
        [1,1,0,0,0,0,0],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [1,1,0,0,0,1,1],
        [1,1,0,0,0,1,1],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1]    
    ],//6
    [
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [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],
        [0,0,0,0,0,1,1]
    ],//7
    [
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [1,1,0,0,0,1,1],
        [1,1,0,0,0,1,1],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [1,1,0,0,0,1,1],
        [1,1,0,0,0,1,1],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1]    
    ],//8
    [
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [1,1,0,0,0,1,1],
        [1,1,0,0,0,1,1],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [0,0,0,0,0,1,1],
        [0,0,0,0,0,1,1],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1]    
    ],//9
    [
        [0,0,0,0,0,0,0],
        [0,0,0,0,0,0,0],
        [0,0,1,1,1,0,0],
        [0,0,1,1,1,0,0],
        [0,0,0,0,0,0,0],
        [0,0,0,0,0,0,0],
        [0,0,1,1,1,0,0],
        [0,0,1,1,1,0,0],
        [0,0,0,0,0,0,0],
        [0,0,0,0,0,0,0]
    ],//冒号
];
</script>    
<script>
var WINDOW_WIDTH=1100;
var WINDOW_HEIGHT=600;
var RADIUS=6;
var X_POSITION=20;
var Y_POSITION=50;
window.onload=function(){
    var canvas=document.getElementById('canvas');
    var context=canvas.getContext('2d');
    canvas.width=WINDOW_WIDTH;
    canvas.height=WINDOW_HEIGHT;
    var canvas2=document.getElementById('canvas2');
    var context2=canvas2.getContext('2d');
    canvas2.width=WINDOW_WIDTH;
    canvas2.height=WINDOW_HEIGHT;
    var oldTime={hour:0,min:0,sec:0};
    var addBalls=[];
    var marr=setInterval(upDate,30);//1s更新一次
    //drawColorNum(5,3)
    var len;
    //setInterval(dropDown,30);
    function upDate(){
        var date=new Date();
        var hour=date.getHours();
        var min=date.getMinutes();
        var sec=date.getSeconds();
        if(oldTime.hour!=hour){
            var hourArr=[parseInt(hour/10),hour%10];
            drawColorNum(hourArr[0],3);
            drawColorNum(hourArr[1],4);
            len=addBalls.length;
        }
        if(oldTime.min!=min){
            var minArr=[parseInt(min/10),min%10];
            drawColorNum(minArr[0],3);
            drawColorNum(minArr[1],4);
            len=addBalls.length;
        }
        if(oldTime.sec!=sec){
            var secArr=[parseInt(sec/10),sec%10];
            //context2.clearRect(0,0,1100,600);
            drawColorNum(secArr[0],6);
            drawColorNum(secArr[1],7);
            len=addBalls.length;    
        }
        oldTime.hour=hour;
        oldTime.min=min;
        oldTime.sec=sec;
        context.clearRect(0,0,1100,600);
        drawTime(hour,min,sec);
        dropDown()
    }
    function drawTime(h,m,s){
        var time=[
            [parseInt(h/10),h%10],
            [parseInt(m/10),m%10],
            [parseInt(s/10),s%10]
        ];
        drawNum(time[0][0],0);
        drawNum(time[0][1],1);
        drawNum(10,2);
        drawNum(time[1][0],3);
        drawNum(time[1][1],4);
        drawNum(10,5);
        drawNum(time[2][0],6);
        drawNum(time[2][1],7);
    }
    function drawNum(z,xPath){//画数字 z:表示数字 xPath:表示在第几个位置
        var x,y;
        context.beginPath();
        var len1=digit[z].length;
        for(var i=0;i<len1;i++){
            var len2=digit[z][i].length;
            for(var j=0;j<len2;j++){
                if(digit[z][i][j]==1){
                    x=(2*j+1+16*xPath)*8+X_POSITION;
                    y=(2*i+1)*8+Y_POSITION;
                    context.arc(x,y,RADIUS,0,2*Math.PI);
                    context.fillStyle='green';
                    context.fill();
                    context.closePath();    
                }
            }
        }
    }
    function drawColorNum(z,xPath){    
        var x0,y0;
        var count=0;
        var len1=digit[z].length;
        for(var i=0;i<len1;i++){
            var len2=digit[z][i].length;
            for(var j=0;j<len2;j++){
                if(digit[z][i][j]==1){
                    count++;
                    var color=createColor();
                    x0=(2*j+1+16*xPath)*8+X_POSITION;
                    y0=(2*i+1)*8+Y_POSITION;
                    drawBall(x0,y0,color);
                    var aBall={
                        x:x0,
                        y:y0,
                        g:3*Math.random(),
                        vx:-15*Math.random()+15*Math.random(),
                        vy:-5*Math.random()+5*Math.random(),
                        color:color
                    };
                    addBalls.push(aBall);
                }
            }
        }
    }        
    function dropDown(){
        for(var i=0;i<len;i++){
            addBalls[i].x+=addBalls[i].vx;
            addBalls[i].y+=addBalls[i].vy;
            addBalls[i].vy+=addBalls[i].g;
            if(addBalls[i].y>=580){
                addBalls[i].y=580;
                addBalls[i].vy=-addBalls[i].vy*0.6;
            }
            if(i==0){
                context2.clearRect(0,0,1100,600);
            }
            drawBall(addBalls[i].x,addBalls[i].y,addBalls[i].color);
        }
    }
    
    function drawBall(x,y,color){
        context2.beginPath();
        context2.arc(x,y,RADIUS,0,2*Math.PI);
        context2.fillStyle=color;
        context2.fill();
        context2.closePath();
    }
    function createColor(){
        var color1=['a','b','c','d','e','f','1','2','3','4','5','6','7','8','9','0'];
        var color2='#';
        for(var m=0;m<6;m++){
            color2+=color1[parseInt(15*Math.random())];    
        }
        return color2;
    }
}
</script>
    javascript代码

    完整代码

    <!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>电子钟</title>
    <style>
        #canvas2{
            position: absolute;
            top: 8px;
            left: 8px;
            z-index: 100;
        }
    </style>
</head>
<body>
<canvas id="canvas" style='display: block;border:1px solid #333;'>
    
</canvas>
<canvas id="canvas2" style='display: block;border:1px solid #333;'>
    
</canvas>
<script>
var digit=[
    [
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [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],
        [1,1,0,0,0,1,1],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1]    
    ],//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],
        [0,1,1,1,1,1,1]    
    ],//1
    [
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [0,0,0,0,0,1,1],
        [0,0,0,0,0,1,1],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [1,1,0,0,0,0,0],
        [1,1,0,0,0,0,0],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1]    
    ],//2
    [
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [0,0,0,0,0,1,1],
        [0,0,0,0,0,1,1],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [0,0,0,0,0,1,1],
        [0,0,0,0,0,1,1],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1]    
    ],//3
    [
        [1,1,0,1,1,0,0],
        [1,1,0,1,1,0,0],
        [1,1,0,1,1,0,0],
        [1,1,0,1,1,0,0],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [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]
    ],//4
    [
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [1,1,0,0,0,0,0],
        [1,1,0,0,0,0,0],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [0,0,0,0,0,1,1],
        [0,0,0,0,0,1,1],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1]    
    ],//5
    [
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [1,1,0,0,0,0,0],
        [1,1,0,0,0,0,0],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [1,1,0,0,0,1,1],
        [1,1,0,0,0,1,1],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1]    
    ],//6
    [
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [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],
        [0,0,0,0,0,1,1]
    ],//7
    [
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [1,1,0,0,0,1,1],
        [1,1,0,0,0,1,1],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [1,1,0,0,0,1,1],
        [1,1,0,0,0,1,1],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1]    
    ],//8
    [
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [1,1,0,0,0,1,1],
        [1,1,0,0,0,1,1],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1],
        [0,0,0,0,0,1,1],
        [0,0,0,0,0,1,1],
        [1,1,1,1,1,1,1],
        [1,1,1,1,1,1,1]    
    ],//9
    [
        [0,0,0,0,0,0,0],
        [0,0,0,0,0,0,0],
        [0,0,1,1,1,0,0],
        [0,0,1,1,1,0,0],
        [0,0,0,0,0,0,0],
        [0,0,0,0,0,0,0],
        [0,0,1,1,1,0,0],
        [0,0,1,1,1,0,0],
        [0,0,0,0,0,0,0],
        [0,0,0,0,0,0,0]
    ],//冒号
];
</script>    
<script>
var WINDOW_WIDTH=1100;
var WINDOW_HEIGHT=600;
var RADIUS=6;
var X_POSITION=20;
var Y_POSITION=50;
window.onload=function(){
    var canvas=document.getElementById('canvas');
    var context=canvas.getContext('2d');
    canvas.width=WINDOW_WIDTH;
    canvas.height=WINDOW_HEIGHT;
    var canvas2=document.getElementById('canvas2');
    var context2=canvas2.getContext('2d');
    canvas2.width=WINDOW_WIDTH;
    canvas2.height=WINDOW_HEIGHT;
    var oldTime={hour:0,min:0,sec:0};
    var addBalls=[];
    var marr=setInterval(upDate,30);//1s更新一次
    //drawColorNum(5,3)
    var len;
    //setInterval(dropDown,30);
    function upDate(){
        var date=new Date();
        var hour=date.getHours();
        var min=date.getMinutes();
        var sec=date.getSeconds();
        if(oldTime.hour!=hour){
            var hourArr=[parseInt(hour/10),hour%10];
            drawColorNum(hourArr[0],3);
            drawColorNum(hourArr[1],4);
            len=addBalls.length;
        }
        if(oldTime.min!=min){
            var minArr=[parseInt(min/10),min%10];
            drawColorNum(minArr[0],3);
            drawColorNum(minArr[1],4);
            len=addBalls.length;
        }
        if(oldTime.sec!=sec){
            var secArr=[parseInt(sec/10),sec%10];
            //context2.clearRect(0,0,1100,600);
            drawColorNum(secArr[0],6);
            drawColorNum(secArr[1],7);
            len=addBalls.length;    
        }
        oldTime.hour=hour;
        oldTime.min=min;
        oldTime.sec=sec;
        context.clearRect(0,0,1100,600);
        drawTime(hour,min,sec);
        dropDown()
    }
    function drawTime(h,m,s){
        var time=[
            [parseInt(h/10),h%10],
            [parseInt(m/10),m%10],
            [parseInt(s/10),s%10]
        ];
        drawNum(time[0][0],0);
        drawNum(time[0][1],1);
        drawNum(10,2);
        drawNum(time[1][0],3);
        drawNum(time[1][1],4);
        drawNum(10,5);
        drawNum(time[2][0],6);
        drawNum(time[2][1],7);
    }
    function drawNum(z,xPath){//画数字 z:表示数字 xPath:表示在第几个位置
        var x,y;
        context.beginPath();
        var len1=digit[z].length;
        for(var i=0;i<len1;i++){
            var len2=digit[z][i].length;
            for(var j=0;j<len2;j++){
                if(digit[z][i][j]==1){
                    x=(2*j+1+16*xPath)*8+X_POSITION;
                    y=(2*i+1)*8+Y_POSITION;
                    context.arc(x,y,RADIUS,0,2*Math.PI);
                    context.fillStyle='green';
                    context.fill();
                    context.closePath();    
                }
            }
        }
    }
    function drawColorNum(z,xPath){    
        var x0,y0;
        var count=0;
        var len1=digit[z].length;
        for(var i=0;i<len1;i++){
            var len2=digit[z][i].length;
            for(var j=0;j<len2;j++){
                if(digit[z][i][j]==1){
                    count++;
                    var color=createColor();
                    x0=(2*j+1+16*xPath)*8+X_POSITION;
                    y0=(2*i+1)*8+Y_POSITION;
                    drawBall(x0,y0,color);
                    var aBall={
                        x:x0,
                        y:y0,
                        g:3*Math.random(),
                        vx:-15*Math.random()+15*Math.random(),
                        vy:-5*Math.random()+5*Math.random(),
                        color:color
                    };
                    addBalls.push(aBall);
                }
            }
        }
    }        
    function dropDown(){
        for(var i=0;i<len;i++){
            addBalls[i].x+=addBalls[i].vx;
            addBalls[i].y+=addBalls[i].vy;
            addBalls[i].vy+=addBalls[i].g;
            if(addBalls[i].y>=580){
                addBalls[i].y=580;
                addBalls[i].vy=-addBalls[i].vy*0.6;
            }
            if(i==0){
                context2.clearRect(0,0,1100,600);
            }
            drawBall(addBalls[i].x,addBalls[i].y,addBalls[i].color);
        }
    }
    
    function drawBall(x,y,color){
        context2.beginPath();
        context2.arc(x,y,RADIUS,0,2*Math.PI);
        context2.fillStyle=color;
        context2.fill();
        context2.closePath();
    }
    function createColor(){
        var color1=['a','b','c','d','e','f','1','2','3','4','5','6','7','8','9','0'];
        var color2='#';
        for(var m=0;m<6;m++){
            color2+=color1[parseInt(15*Math.random())];    
        }
        return color2;
    }
}
</script>
</body>
</html>
    View Code
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  • 原文地址：https://www.cnblogs.com/TAO-JL/p/5989075.html
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