angular - 在异步管道重新订阅上重构的角子组件(Angular child component reconstructed on async pipe resubscription)

Question

I am using 'ngFor' directive to initialize a list of child components:

(我正在使用ngFor指令初始化子组件列表：)

Parent component:

(父组件：)

 <div *ngFor="let item of serviceGetter.items | async; let i = index">
     <child-component [item]="item" [currentIndex]="i"></child-component>
</div>

Service:

(服务：)

@Injectable()
export class TermsService {

   private dataStore: {
     data: any[];
   } = { data: [] };

   get items() {
     return this._data$.asObservable();
   }

   //data are populated inside this method
   someMethod() {
      this.dataStore.data= result;
      this._data$.next(Object.assign({}, this.dataStore).data);
   }

   updateSpecificItem() {
       ....          

      this.dataStore.data[index] = {
         ...somedata,
      };
   }
}

'Child component' change detection is set to 'OnPush'.

(“子组件”更改检测设置为“ OnPush”。)

The problem is when 'updateSpecificItem()' function is called child component at 'index' position is reinitialized(constructor call).

(问题是当“ updateSpecificItem（）”函数在“索引”位置的子组件被重新初始化（构造函数调用）时。)

Is there a solution to avoid this or is this the accepted behavior?

(有解决方案可以避免这种情况吗？还是这是公认的行为？)

  ask by tsiro translate from so

Answer 1

等待大神答复