百度了一會兒也沒找到原因 --瀏覽器拋出的錯誤信息是Uncaught Error: Objects are not valid as a React child (found: object with keys {}). If you meant to render a collection of children, use an array instead or wrap the object using createFragment(object) from the React add-ons. Check the render method of App.import React , { PureComponent,Component } from 'react'import localStore from '../util/localStore.js'import {cityName} from '../config/localStoreCity.js'import  { connect } from 'react-redux'import { bindActionCreators } from 'redux'import * as actions from '../actions/action'class App extends React.Component {  constructor(props,context){      super(props,context);      this.state={        inintdone:false      }  }  render() {    return(      <div>        <div  >{this.props.reducerCity}</div>        {          this.state.inintdone ?          this.props.children          :<span> 加載中1...</span>        }      </div>    )  }  componentDidMount(){    let name = localStore.getItem(cityName)    if (name ==null){        name='北京'    }    setTimeout(()=>{      this.setState({        inintdone :true      })    },1000)    this.props.action.localCity({            cityName: name,    })      }}function  mapStateToProps(state){  console.log(state);  return state}function mapDispatchToProps(dispatch) {    return {        action: bindActionCreators(actions, dispatch)    }}export default connect(    mapStateToProps,    mapDispatchToProps)(App)我的想法是dispatch city以后 <div >{this.props.reducerCity}</div> 這里的城市會對應的變化，但是為什么金額會報錯呢。而且我在mapStateToProps這里console了一下。為什么會執行了兩遍。第一遍參數是空。第二遍就有了我的對應的參數。。