本文实例为大家分享了微信小程序做电子签名，并导出图片的具体代码，供大家参考，具体内容如下
wxml:
<canvas class=canvas id=canvas canvas-id=canvas disable-scroll=true bindtouchstart=canvasStart bindtouchmove=canvasMove bindtouchend=canvasEnd touchcancel=canvasEnd binderror=canvasIdErrorCallback></canvas>
<button type=default
