fupin/components/views/view-sign/view-sign.wxml

<view class="modal-content-area">
    <view class="modal-content">
        <view class="toast" wx:if="{{!hasDraw}}">
          请在此使用正楷签名
        </view>
        <canvas canvas-id="signature" class="modal-canvas" disable-scroll="{{true}}" id="writeCanvas" bindtouchstart="scaleStart" bindtouchmove="scaleMove" bindtouchend="scaleEnd"></canvas>
    </view>
</view>