Error in nextTick: "TypeError: Cannot read property '0' of undefined"

Question

我在学《饿了么webapp》开发中遇到：created () {    this.classMap = ['decrease', 'discount', 'special', 'invoice', 'guarantee']    this.$http.get('/api/goods').then(response => {      this.goods = response.body.data      console.log(this.goods)      this.$nextTick(() => {        this._initScroll()      })    }, response => {    // error callback    })  },  methods: {    _initScroll () {      this.meunScroll = new BScroll(this.$refs.menuWrapper, {})      this.foodsScroll = new BScroll(this.$refs.foodsWrapper, {})    }  }我用的vue2.0，跟视频里面不一样。console报错：Error in nextTick: "TypeError: Cannot read property '0' of undefined"大神帮忙看看nextTick这个函数怎么会报错，谢谢啦

Answer 1

请保持版本一致。