不是这么用的，下面是正确获取editor内容的写法

<view>
  <editor id="editor" class="editor" placeholder="在此输入" bindblur="bindblur" bindready="onEditorReady"/>
</view>

onEditorReady() {
  let that = this
  wx.createSelectorQuery()
    .select('#editor')
    .context()
    .exec( res => {
      if(res) {
        const editorContext = res[0].context
        that.editorCtx = editorContext
      }
    })
},

bindblur(e) {
  // console.log('blur:', this.editorCtx)
  this.editorCtx.getContents({
    success: function(res) {
      console.log(res)
    },
    fail: function(error) {
      console.log(error)
    }
  })
}