我需要一个帮助器函数来使用ngFor遍历复杂的对象数组

import { Pipe, PipeTransform } from '@angular/core';

@Pipe({ name: 'keyValue' })
export class KeyValuePipe implements PipeTransform {
  transform(obj: any): any[] {
    const keys = Object.keys(obj);
    return keys.map(key => ({ key: key, value: obj[key] }));
  }
}

import { KeyValuePipe } from './key-value.pipe';

@Component({
  // ...
  pipes: [KeyValuePipe]
})

<div *ngFor="let item of obj | keyValue">
  Key: {{ item.key }}, Value: {{ item.value }}
</div>