Vuex：_this。$ store未定义

Question

将Vuex添加到我的项目后，我无法在任何组件中访问this。$ store。错误消息是

TypeError：_this。$ store未定义

我已经看过很多问题，试图解决这个问题，但据我所知，我所做的一切正确。有人可以帮忙吗？我正在使用vue-cli Webpack作为我的项目基础

main.js：

import Vue from 'vue';
import resource from 'vue-resource';
import router from './router';
import store from './store/index.js';

import App from './App';
import Home from './components/Home';
import NavButton from './components/atoms/NavButton';

Vue.use(resource);
Vue.config.productionTip = false;

/* eslint-disable no-new */
new Vue({
  el: '#app',
  router,
  store,
  components: { App, Home, NavButton },
  template: '<App/>'
})

/store/index.js：

import Vue from 'vue'
import Vuex from 'vuex'

Vue.use(Vuex);

const state = {
    isWriting: false,
    isLoggedIn: false,
}

const getters = {
    isWriting: state => {
        return state.isWriting;
    }
}

export default new Vuex.Store({
    state,
    getters,
});

应用程序

...
import NavBar from '@/components/organisms/NavBar';
export default {
  name: 'App',
  components: { NavBar },
  created: () => {
    console.log(this.$store.state.isLoggedIn); // THIS LINE
  }
}
...

package.json

...
"dependencies": {
    "vue": "^2.5.2",
    "vue-resource": "^1.3.6",
    "vue-router": "^3.0.1",
    "vuex": "^3.0.1"
  },
...

Answer 1

解决了：

在创建时使用粗箭头不正确，应该是 created: function() {...}