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怎么實(shí)現(xiàn)從xx天xx時(shí)xx分xx秒開(kāi)始倒計(jì)時(shí)

怎么實(shí)現(xiàn)從xx天xx時(shí)xx分xx秒開(kāi)始倒計(jì)時(shí)？謝謝，最好附上源碼

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// JavaScript Document

//window.width =1024;

//window.height =768;

//窗口的處理更加的方便

/*

var WINDOW_WIDTH =1024;

var WINDOW_HEIGHT =768;

var RADIUS =8;

var MARGIN_LEFT =30;

var MARGIN_TOP =60;

const endTime =new Date("2016-07-26 18:20:30");

var curShowTimeSeconds =0;


window.onload = function(){

var canvas =document.getElementById("canvas");

var context =canvas.getContext("2d");

canvas.width =WINDOW_WIDTH;

canvas.height =WINDOW_HEIGHT;

curShowTimeSeconds =getCurrentShowTimeSeconds();

render( context );//繪制當(dāng)前的canvas函數(shù)的畫(huà)布

}

function getCurrentShowTimeSeconds(){

var curTime =new Date();

var ret =endTime.getTime()-curTime.getTime();

ret =Math.round(ret/1000);//換算成秒并且取整

return ret>0?ret :0;

}



function render( cxt ){

var hours =parseInt(curShowTimeSeconds/3600);

var minutes =parseInt((curShowTimeSeconds-hours*3600)/60);

var seconds =curShowTimeSeconds%60;

renderDigit(MARGIN_LEFT,MARGIN_TOP,parseInt(hours/10),cxt);

renderDigit(MARGIN_LEFT+15*(RADIUS+1),MARGIN_TOP,parseInt(hours%10),cxt);

renderDigit(MARGIN_LEFT+30*(RADIUS+1),MARGIN_TOP,10,cxt);

? ? renderDigit(MARGIN_LEFT+39*(RADIUS+1),MARGIN_TOP,parseInt(minutes/10),cxt);

renderDigit(MARGIN_LEFT+54*(RADIUS+1),MARGIN_TOP,parseInt(minutes%10),cxt);

renderDigit(MARGIN_LEFT+69*(RADIUS+1),MARGIN_TOP,10,cxt);

renderDigit(MARGIN_LEFT+78*(RADIUS+1),MARGIN_TOP,parseInt(seconds/10),cxt);

renderDigit(MARGIN_LEFT+93*(RADIUS+1),MARGIN_TOP,parseInt(seconds%10),cxt);

? ??

? ?

}



function renderDigit(x,y,num,cxt){

cxt.fillStyle ="rgb(0,102,153)";

for (var i =0;i<digit[num].length;i++)

for (var j=0;j<digit[num][i].length;j++)

if(digit[num][i][j]==1)

{

cxt.beginPath();

cxt.arc(x+j*2*(RADIUS+1)+(RADIUS+1),y+i*2*(RADIUS+1)+(RADIUS+1),RADIUS,0,2*Math.PI);

cxt.closePath();

cxt.fill();

}

}

*/

var WINDOW_WIDTH = 1024;

var WINDOW_HEIGHT = 768;

var RADIUS = 8;

var MARGIN_TOP = 60;

var MARGIN_LEFT = 30;


const endTime = new Date(2016,7,26,22,47,52);

var curShowTimeSeconds = 0


window.onload = function(){


? ? var canvas = document.getElementById('canvas');

? ? var context = canvas.getContext("2d");


? ? canvas.width = WINDOW_WIDTH;

? ? canvas.height = WINDOW_HEIGHT;


? ? curShowTimeSeconds = getCurrentShowTimeSeconds()

? ? render( context )

}


function getCurrentShowTimeSeconds() {

? ? var curTime = new Date();

? ? var ret = endTime.getTime() - curTime.getTime();

? ? ret = Math.round( ret/1000 )


? ? return ret >= 0 ? ret : 0;

}


function render( cxt ){


? ? var hours = parseInt( curShowTimeSeconds / 3600);

? ? var minutes = parseInt( (curShowTimeSeconds - hours * 3600)/60 )

? ? var seconds = curShowTimeSeconds % 60


? ? renderDigit( MARGIN_LEFT , MARGIN_TOP , parseInt(hours/10) , cxt )

? ? renderDigit( MARGIN_LEFT + 15*(RADIUS+1) , MARGIN_TOP , parseInt(hours%10) , cxt )

? ? renderDigit( MARGIN_LEFT + 30*(RADIUS + 1) , MARGIN_TOP , 10 , cxt )

? ? renderDigit( MARGIN_LEFT + 39*(RADIUS+1) , MARGIN_TOP , parseInt(minutes/10) , cxt);

? ? renderDigit( MARGIN_LEFT + 54*(RADIUS+1) , MARGIN_TOP , parseInt(minutes%10) , cxt);

? ? renderDigit( MARGIN_LEFT + 69*(RADIUS+1) , MARGIN_TOP , 10 , cxt);

? ? renderDigit( MARGIN_LEFT + 78*(RADIUS+1) , MARGIN_TOP , parseInt(seconds/10) , cxt);

? ? renderDigit( MARGIN_LEFT + 93*(RADIUS+1) , MARGIN_TOP , parseInt(seconds%10) , cxt);

}


function renderDigit( x , y , num , cxt ){


? ? cxt.fillStyle = "rgb(0,102,153)";


? ? for( var i = 0 ; i < digit[num].length ; i ++ )

? ? ? ? for(var j = 0 ; j < digit[num][i].length ; j ++ )

? ? ? ? ? ? if( digit[num][i][j] == 1 ){

? ? ? ? ? ? ? ? cxt.beginPath();

? ? ? ? ? ? ? ? cxt.arc( x+j*2*(RADIUS+1)+(RADIUS+1) , y+i*2*(RADIUS+1)+(RADIUS+1) , RADIUS , 0 , 2*Math.PI )

? ? ? ? ? ? ? ? cxt.closePath()


? ? ? ? ? ? ? ? cxt.fill()

? ? ? ? ? ? }

}



0 回復(fù) 有任何疑惑可以回復(fù)我~
#1

zero沐白

還是00：00：00。。。。。。。
2016-10-10 回復(fù) 有任何疑惑可以回復(fù)我~

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