数组列表如何实现数据的双向同步？

@Observed  
export class CommentTagBean{  
  contents:string;  
  selected:boolean;  
  constructor(contents: string,selected:boolean) {  
    this.contents = contents;  
    this.selected = selected;  
  }  
}  
  
  
  
import { CommentTagBean } from '../component/CommentTagBean'  
  
@Component  
export  struct CommentTag {  
  @ObjectLink tagInfo: CommentTagBean  
  build() {  
    Text(this.tagInfo.contents) .fontSize(13) .fontColor(this.tagInfo?.selected ? Color.Red : Color.Black)  
      .borderWidth('0.5vp')  .borderRadius('15vp') .textAlign(TextAlign.Center)  
      .maxLines(1) .padding({ left: '10vp', top: '7vp', right: '10vp', bottom: '7vp' })  
      .margin({ right: '12vp', bottom: '12vp' }) .onClick(() => { this.tagInfo.selected = !this.tagInfo.selected  
      console.log(' this.tagInfo=='+this.tagInfo.selected.valueOf())  
    })  
  } }