React 修改 state中对象

[powerdong]

state={
 datavalue:{
      name:'',
      memo:''
     },
 }

设置 state 值

SetName=(e)=>{
      let val=e.target.value;
      let data = Object.assign({}, this.state.datavalue, { name: val })
      this.setState({
        datavalue: data
      })
}