- 如果new Date("2016/06/17, 18:47:52") 是这样的话就会只出现小时并且报countdown.js:53 Uncaught TypeError: Cannot read property 'length' of undefined 要是new Date(2016,6,17,22,47,52)这样的话，就会都是0，而且不报错，这是怎么回事 当前时间为2016,7,16 20:18 麻烦大家了 -
var WINDOW_WIDTH = 1024;
var WINDOW_HEIGHT = 768;
var RADIUS = 8;
var MARGIN_TOP = 60;
var MARGIN_LEFT = 30;
const endTime = new Date("2016/06/17, 18:47:52");
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 = curTime.getTime() - endTime.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()
}
}
哪里有问题么
