1.2.3 • Published 2 years ago
canvas-sign-online v1.2.3
canvas-sign
Use
npm run canvas-sign-online --save
第一步初始化并且设置容器大小:
import CanvasSign from "canvas-sign-online";
const cv = document.getElementById("canvas");
const canvas = new CanvasSign(cv);
cv.width = '500';
cv.height = '500';
第二步画笔设置样式:
canvas.setLineStyle({
strokeStyle: "black",
lineWidth: 2,
shadowBlur: '1',
lineCap: 'round',
shadowColor: 'black',
lineJoin: 'round',
})
接下来就是自由绘制了。
绘制完成后导出:
// 导出json
const dataJson = canvas.toJson().dataJson;
// 导出图片
const img = document.createElement("a");
img.href = canvas.getPNGImage();
img.download = "canvas-sign.png";
img.style.display = "none";
document.body.appendChild(img);
img.click();
document.body.removeChild(img);
导入json:
canvas.loadJson(dataJson);
api列表:
api | Description | Note |
---|---|---|
getPNGImage | png格式导出 | |
getJPGImage | jpg格式导出 | |
clear | 清除画板 | |
setLineStyle | 设置画笔样式 | 同原生canvas 样式和颜色 |
toJson | 导出json | |
loadJson | 加载已经导出的json | toJson().dataJson |