smallexecanvas/index/index.wxml

<canvas type="2d" id="canvas" disable-scroll bindtouchmove="move" bindtouchend="end" bindtouchstart="start"></canvas>

<view class="tool">
  <block wx:for="{{list}}" wx:key="item">
    <image src="{{item.url}}" mode="aspectFit" data-item="{{item}}" bind:tap="onChange" />
  </block>
</view>
<view class="btns">
  <view>
    旋转角度： <input type="number" model:value="{{angle}}" />
  </view>
  <button bind:tap="back">撤销</button>
  <button bind:tap="clear">清空</button>
  <button bind:tap="save">保存</button>
</view>