针对state为对象,想要修改对象中某一个值而不修改其他值,请欣赏接下来的方法
以前写法
1.设置state对象

state={
 datavalue:{
      slid:'',
      name:'',
      memo:'',
      version:'',
      icon:defaultimg,
      loginlink:'',
      key:'',
      support_game:[],
      noticelink:'',
      contact:{key:-1,label:''},
      group:{key:'',label:''},
     },
     }

2 修改state对象

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

React17版本写法:
1.设置state对象

[datavalue,setDatavalue]=useState({
      slid:'',
      name:'',
      memo:'',
      version:'',
      icon:defaultimg,
      loginlink:'',
      key:'',
      support_game:[],
      noticelink:'',
      contact:{key:-1,label:''},
      group:{key:'',label:''},
})

2 修改state对象

  let data = Object.assign({}, this.state.datavalue, { name: val })
  setDatavalue(data);//更新数据
   console.log(this.state.datavalue,data)