Angular 6并结合了可观察对象的最新问题

Question

你好，我有下面的代码：

 public cards: Observable<Array<Card[]> = combineLatest(
    INITIAL_DATA.map(card =>
      this.resolveAsset(card.name).pipe(
        map((uri: string): Card => ({
          ...card,
          imageURI: uri,
        })),
      ),
    ),
  );
}

这会给我以下关于CombineLatest和Obserables的错误消息。

[ts]
Type 'OperatorFunction<{}, [{}, Observable<Card>]>' is not assignable to type 'Observable<Card[][]>'.
  Property '_isScalar' is missing in type 'OperatorFunction<{}, [{}, Observable<Card>]>'.
(alias) class Observable<T>
import Observable
A representation of any set of values over any amount of time. This is the most basic building block of RxJS.

我的卡的界面模型如下：card.model.ts

export interface Card {
  name: string;
 balance: number;
imageURI: string;
}