不用css3,如何实现边框的圆角处理?我知道就是用背景图片,还有没有其他方法?
采用svg
<svg width="100" height="100">
<desc>SVG圆角效果</desc>
<defs>
<pattern id="raduisImage" patternUnits="userSpaceOnUse" width="100" height="100">
<image xlink:href="test.jpg" x="0" y="0" width="625" height="605" />
</pattern>
</defs>
<circle cx="50" cy="50" r="50" fill="url(#raduisImage)"></circle>
</svg>
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<title>圆角矩形</title>
<style>
body { background: url("./images/bg3.jpg") repeat; }
#canvas { border: 1px solid #aaaaaa; display: block; margin: 50px auto; }
</style>
</head>
<body>
<div id="canvas-warp">
<canvas id="canvas">
你的浏览器居然不支持Canvas？！赶快换一个吧！！
</canvas>
</div>
<script>
window.onload = function(){
var canvas = document.getElementById("canvas");
canvas.width = 800;
canvas.height = 600;
var context = canvas.getContext("2d");
context.fillStyle = "#FFF";
context.fillRect(0,0,800,600);
drawRoundRect(context, 200, 100, 400, 400, 50);
context.strokeStyle = "#0078AA";
context.stroke();
}
function drawRoundRect(cxt, x, y, width, height, radius){
cxt.beginPath();
cxt.arc(x + radius, y + radius, radius, Math.PI, Math.PI * 3 / 2);
cxt.lineTo(width - radius + x, y);
cxt.arc(width - radius + x, radius + y, radius, Math.PI * 3 / 2, Math.PI * 2);
cxt.lineTo(width + x, height + y - radius);
cxt.arc(width - radius + x, height - radius + y, radius, 0, Math.PI * 1 / 2);
cxt.lineTo(radius + x, height +y);
cxt.arc(radius + x, height - radius + y, radius, Math.PI * 1 / 2, Math.PI);
cxt.closePath();
}
</script>
</body>
</html>
引用Bootstrap文件 class='img-rounded'
另一种可以用 border-radius :20px;