老师，请问为什么要在画圆的时候就fill呢？我试了试在最后fill的话只有橙色？

来源：7-2 编程练习

慕勒8522502

2020-06-05 06:03:58

<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8" />
    <title>Document</title>
    <style>
        canvas{background-color:lightblue;}
    </style>
</head>
<body>
    <canvas id="canvas" width="800px" height="800px">
        您的浏览器不支持canvas
    </canvas>
    <script>
        var canvas=document.getElementById("canvas");
        var context=canvas.getContext("2d");
        //在此处补充代码
        context.arc(400,400,200, 0,Math.PI*2,true);
        context.fill();
        context.clip();

        context.fillStyle = "green";
        context.fillRect(200,200,200,200);

        context.fillStyle = "purple";
        context.fillRect(400,200,200,200);

        context.fillStyle = "pink";
        context.fillRect(400,400,200,200);

        context.fillStyle = "orange";
        context.fillRect(200,400,200,200);


    </script>
</body>
</html>

写回答

1回答