edu-mini/components/painter/painter.wxml

<view style='position: relative;{{customStyle}};{{painterStyle}}'>
    <block wx:if="{{!use2D}}">
        <canvas canvas-id="photo" style="{{photoStyle}};position: absolute; left: -9999px; top: -9999rpx;"/>
        <canvas canvas-id="bottom" style="{{painterStyle}};position: absolute;"/>
        <canvas canvas-id="k-canvas" style="{{painterStyle}};position: absolute;"/>
        <canvas canvas-id="top" style="{{painterStyle}};position: absolute;"/>
        <canvas
                canvas-id="front"
                style="{{painterStyle}};position: absolute;"
                bindtouchstart="onTouchStart"
                bindtouchmove="onTouchMove"
                bindtouchend="onTouchEnd"
                bindtouchcancel="onTouchCancel"
                disable-scroll="{{true}}"/>
    </block>
    <block wx:if="{{use2D}}">
        <canvas type="2d" id="photo" style="{{photoStyle}};"/>
        <!-- <canvas type="2d" id="bottom" style="{{painterStyle}};position: absolute;" />
        <canvas type="2d" id="k-canvas" style="{{painterStyle}};position: absolute;" />
        <canvas type="2d" id="top" style="{{painterStyle}};position: absolute;" />
        <canvas
          type="2d"
          id="front"
          style="{{painterStyle}};position: absolute;"
          bindtouchstart="onTouchStart"
          bindtouchmove="onTouchMove"
          bindtouchend="onTouchEnd"
          bindtouchcancel="onTouchCancel"
          disable-scroll="{{true}}" /> -->
    </block>
</view>