angular 中过滤后的数据未刷新

Question

我正在尝试根据 last_name.

过滤对象数组

 filterItems(searchTerm) {
    return this.EmpData.filter(emp => {
      return emp.lastName.toLowerCase().indexOf(searchTerm.toLowerCase()) > -1 || driver.firstName.toLowerCase().indexOf(searchTerm.toLowerCase()) > -1;
    });
  }

并在 html 模板中

 <ion-list *ngIf="showEmpList">
                <ion-item *ngFor="let item of EmpData" button (click)="selectEmp(item.lastName)">
                    <ion-label>{{item.lastName}}, {{item.middle}}, {{item.firstName}}</ion-label>
                </ion-item>
     </ion-list>

当我在搜索框中输入姓名时，这是有效的，但当我从姓名中删除字符时，结果不会刷新新数据。例如- 我有数据=[{name:'Amir','age':28},{name:'AAmir', age:26},{name:'AAAmir', age:30}] 现在，如果我将 AA 放入搜索框中，它将显示最后两个结果，如果我将 AAA 放入，那么它现在将仅显示最后一个 emp 数据，如果我从输入字段中删除两个或更多字符，假设新输入是 A，那么结果仅显示最后一名员工数据

请提前help.Thanks

Answer 1

可能是您过滤后的数组指向与原始数组相同的数组，这就是您要更改原始数组的原因。我已经完成了一些相同的代码：-

Stackblitz URL :- https://stackblitz.com/edit/ionic-gqingy

HTML :-

 <input type="text" [(ngModel)]="filterText" (ngModelChange)="filterValues()"/>

 <ion-list>
                <ion-item *ngFor="let item of filteredData" button (click)="selectEmp(item.lastName)">
                    <ion-label>{{item.name}}, {{item.age}}</ion-label>
                </ion-item>
     </ion-list>

TS :-

import { Component } from '@angular/core';
import { Platform } from 'ionic-angular';

import { TabsPage } from '../pages/tabs/tabs';

@Component({
  templateUrl: 'app.html'
})
export class MyApp {
  rootPage:any = TabsPage;
  EmpData = [{name:'Amir',age:28},{name:'AAmir', age:26},{name:'AAAmir', age:30}];
  filteredData = [{name:'Amir',age:28},{name:'AAmir', age:26},{name:'AAAmir', age:30}];
  public filterText: string = '';
  constructor(platform: Platform) {
    platform.ready().then(() => {
      // Okay, so the platform is ready and our plugins are available.
      // Here you can do any higher level native things you might need.

    });
  }

  public filterValues() {
    this.filteredData = this.EmpData.filter((data) => data.name.toLowerCase().includes(this.filterText? this.filterText.toLowerCase():''));
  }
}

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