好的，明白了，多谢大佬指点

可以了，非常感谢

还是无效

微信小程序端 删除线
.scrollview{
margin-top: 100px;
white-space: nowrap;
width: 100%;
height:5000px;
}
.toolBar{
position: fixed;
top:0;
display: flex;
justify-content: space-around;
width: 100%;
z-index: 999;
background: #fff;
.tag{
display: block;
width: 25%;
text-align: center;
}
}

js代码：
import Taro, { Component } from '@tarojs/taro'
import { View, ScrollView} from '@tarojs/components'
import './index.less'

export default class Position extends Component {
constructor(props) {
super(props);
this.state = {
viewId:"A",
scrollTop:0,
list:[
{
id:"A",
name:'A'
},
{
id:"B",
name:'B'
},
{
id:"C",
name:'C'
},
{
id:"D",
name:'D'
}
]
}
}

setView(item){
console.log(item);
let id = item.id;
this.setState({
viewId:id
});
}
render() {
console.log(this.state.viewId);
return (
<View>
<View className="toolBar">
{this.state.list.map(item =>{
return (
<View className="tag" key={item.id} onClick={this.setView.bind(this,item)}>{item.name}</View>
)
})}
</View>

  <ScrollView
    className="scrollview"
    scrollX = {true}
    scrollIntoView={this.state.viewId}
  >
    <View id='A' style='height:500px;background:red'>A</View>
    <View id='B' style='height:500px;background:green'>B</View>
    <View id='C' style='height:500px;background:red'>C</View>
    <View id='D' style='height:500px;background:green'>D</View>
    <View id='E' style='height:500px;background:red'>E</View>
    <View id='F' style='height:500px;background:green'>F</View>
    <View id='G' style='height:500px;background:red'>G</View>
    <View id='H' style='height:500px;background:green'>H</View>
    <View id='I' style='height:500px;background:red'>I</View>
    <View id='J' style='height:500px;background:green'>J</View>
  </ScrollView>
</View>
)

}
}