运行效果截图如下：
具体代码如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>canvas绘制矩形</title>
<script type="text/javascript" >
function draw(id) {
var canvas = document.getElementById("canvas")
if (canvas) {
var context = canvas.getContext("2d")
context.fillStyle = "#DDDDDD"
context.fillRect(0, 0, 400, 400)
context.strokeStyle = "black"
context.fillStyle = "gray"
context.lineWidth = 5
context.fillRect(0,0,200,300)
context.strokeRect(0,0,200,200)
} else {
return
}
}
function drawBorder(id) {
var canvas = document.getElementById("canvas2")
if (canvas) {
var context = canvas.getContext("2d")
context.fillStyle = "red"
context.strokeStyle = "black"
context.lineWidth = 5
context.fillRect(0,0, 300, 200)
context.strokeRect(0,0,300,200)
} else {
return
}
}
window.onload = function () {
draw("canvas")
drawBorder("canvas2")
}
</script>
</head>
<body>
<canvas id="canvas" width="400" style="background:red" height="400"></canvas>
<hr />
<canvas id="canvas2" width="400" height="400"></canvas>
</body>
</html>
test:function(){
varballoonPurpleObj =this.balloonPurple.getBoundingBox()
//var tonguePlateObj = this.tonguePlate.getBoundingBox()
vardrawNode =newcc.DrawNode()
drawNode.clear()//清除节点缓存
drawNode.ctor()//构造函数
drawNode.drawRect(cc.p(balloonPurpleObj.x,balloonPurpleObj.y),cc.p(balloonPurpleObj.x+balloonPurpleObj.width,balloonPurpleObj.y+balloonPurpleObj.height),cc.color(180,180,180))
drawNode.setZOrder(100)
this.addChild(drawNode)//加入Layer层
},
用canvas，画矩形的方法是rect，四个参数就是输入的四个坐标，当然也可以用画线段的方式画出来。旋转的话canvas也支持rotate方法，参数是45deg就可以了，跟CSS3差不多的使用方法。
