javascript-自定义管道未正确导入

这个问题已经在这里有了答案：            >            How to iterate object keys using *ngFor?                                    4个
我必须遍历模板内的对象键,所以我做了这个自定义管道：

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

@Pipe({name: "keys"})
export class KeysPipe implements PipeTransform {
  transform(value: any, args?: any[]): any[] {
    return Object.keys(value);
  }
}

在我的页面中,它的导入方式如下：

import {KeysPipe} from "../../pipes/keys-pipe";
import {Component} from '@angular/core';
@Component({
  selector: 'page-history',
  templateUrl: 'history.html',
  pipes: [ KeysPipe ]
})
export class HistoryPage {}

但是当我构建项目时,会发生此错误：

Argument of type ‘{ selector: string; templateUrl: string; pipes: typeof KeysPipe[]; }’ is not assignable to parameter of type ‘Component’. Object literal may only specify known properties, and ‘pipes’ does not exist in type ‘Component’.

任何想法 ？我没有在app.module.ts或app.component.ts中声明它.
谢谢.

解决方法:

由于相当长一段时间,@ Component()中不再有管道.

现在是

@NgModule({
  declarations: [ KeysPipe ]

另见Select based on enum in Angular2

标签：angular,typescript,ionic-framework,ionic2,javascript
来源： https://codeday.me/bug/20191026/1936730.html