微信小程序ES6箭头函数中的this问题

开发微信小程序过程中，在一个回调函数中对js中的变量赋值时出现报错:Cannot read property 'setData' of undefined;at api chooseImage success callback function

代码如下：

wx.chooseImage({
      count: 3,
      sizeType: ['original'],
      sourceType: ['album', 'camera'],
      success (res) {
        // tempFilePath可以作为img标签的src属性显示图片
        const tempFilePaths = res.tempFilePaths;
        this.setData({
          imgPaths:tempFilePaths
        });
      },
      fail(err){

      }
    });
  }

错误如下：

VM6263:1 thirdScriptError
Cannot read property 'setData' of undefined;at api chooseImage success callback function
TypeError: Cannot read property 'setData' of undefined
    at success (http://127.0.0.1:43580/appservice/pages/comment/comment.js:42:14)
    at Function.o.<computed> (WAService.js:1:1116874)
    at Object.success (WAService.js:1:102889)
    at r (WAService.js:1:418891)
    at WAService.js:1:419068
    at v (WAService.js:1:419077)
    at WAServic