weixin_44968614的博客

<view class="signCanvas"> <text bindtap="onOpenSignCanvas">打开 canvas </text> <view wx:if="{{isSignCanvasShow}}" class="signCanvas-shade-box"> <view class="signCanvas-shade"> <view class="canvas-box"> ...

var canvas20210510 = document.getElementById('canvas20210510') var canvas202105102D = document.getElementById('canvas20210510').getContext("2d") const canvas20210510getImageData = canvas202105102D.getImageData(0, 0, canvas20210510.width, canvas20210510.he.