HarmonyOS 关于objectLink在数组对象中使用时，修改数据页面不刷新问题

//@Observed @ObjectLink 
@Observed 
class InnerMessageVo { 
 content: string; 
 id: number; 
 readState: boolean; 
 constructor(id: number,content: string,readState: boolean) { 
  this.id = id; 
  this.content = content; 
  this.readState = readState; 
 } 
} 
@Component 
struct ViweA{ 
 @ObjectLink a: InnerMessageVo; 
 build() { 
  Row(){ 
   Text(this.a.content) 
  } 
 } 
} 
@Entry 
@Component 
struct Index2 { 
 @State arr1: InnerMessageVo[] = [new InnerMessageVo(1,"123",true),new InnerMessageVo(2,"123",true),new InnerMessageVo(3,"123",true)] 
 build() { 
  Row() { 
   Column() { 
    List(){ 
     ForEach(this.arr1,(item: InnerMessageVo,index: number)=>{ 
      ListItem(){ 
       ViweA({a:item}) 
       //Text(this.arr1[index].content) 
      } 
     }) 
    } 
    Button('change') 
     .onClick(() => { 
      console.log('123'); 
      this.arr1[1].content = '666' 
     }) 
   } 
   .width('100%') 
  } 
  .height('100%') 
 } 
}