jCanvaScript是一个面向HTML5画布(canvas)的Javascript类库,它提供了许多方法用于简化处理HTML5画布(canvas)元素的内容,只要支持canvas和Javascript的浏览器都可以使用它,包括iPhone、iPad和Android等平台。
示例代码:
var interval_1=0; function startShow() { var r = Math.floor(Math.random() * (254)); var g = Math.floor(Math.random() * (254)); var b = Math.floor(Math.random() * (254)); var x = Math.floor(Math.random() * (439)); var y = Math.floor(Math.random() * (554)); fillStyle = "rgba("+r+", "+g+", "+b+", 0.5)"; jc.circle(x,y,1,fillStyle,1) .animate({radius:100,alpha:0},1500,function(){ this.del(); }); } function onload_1() { jc.start(idCanvas,25); interval_1=setInterval("startShow()",200); } function start_1(idCanvas) { if(interval_1)return; onload_1(); } function stop_1(idCanvas) { clearInterval(interval_1); interval_1=0; jc.clear(idCanvas); }