1.使用strokeRect和fillRect方法绘制矩形
a.strokeRect是绘制一个不填充的矩形
b.fillRect是绘制一个填充的矩形
代码:
<script> var canvas = document.getElementById('canvas'), context = canvas.getContext('2d'); context.lineJoin = 'round'; context.lineWidth = 20; context.strokeRect(10, 10, 150, 100); context.fillRect(180, 10, 150, 100); </script>
效果如图:
2.通过lineTo绘制矩形
<script> var canvas = document.getElementById('canvas'), context = canvas.getContext('2d'); context.lineJoin = 'round'; context.lineWidth = 20; context.beginPath(); context.moveTo(10, 10); context.lineTo(160, 10); context.lineTo(160, 110); context.lineTo(10, 110); context.closePath(); context.stroke(); context.beginPath(); context.moveTo(180, 10); context.lineTo(330, 10); context.lineTo(330, 110); context.lineTo(180, 110); context.closePath(); context.fill(); </script>
效果图如下: