请使用模型名称ResProject和变量resProject:Observable;

这是我的代码:

import { Component } from '@angular/core';
import { IonicPage, NavController, NavParams } from 'ionic-angular';
import { Observable } from "rxjs";

@IonicPage()
@Component({
  selector: 'page-project',
  templateUrl: 'project.html',
})
export class ProjectPage {
  resProject : Observable <ResProject[]> ;
  constructor(public navCtrl: NavController,
              public navParams: NavParams)


对于ResProject的模型,如下所示:

export interface ResProject {
    key?: string;
    type : string ;
    name : string;
    nbrUnit : number ;
    nbrFloor : number ;
}


对于HTML,这是我的代码:

   <ion-item *ngFor="let rp of resProject  | async" detail-push navPush="ViewProjectPage" [navParams]="{resProject:rp} "  >
    {{rp.name}}
  </ion-item>


请注意,我从Firebase获取Resproject的数据。

如何在ion-serchbar或任何其他解决方案中过滤此ResProject列表?

最佳答案

在您的情况下,您似乎正在使用Observables(Rxjs),而这些不是Arrays,因此您不能直接将Observables与.filter等数组方法一起使用。您可以使用Observable的运算符“ filter”来实现过滤器:https://www.learnrxjs.io/operators/filtering/filter.html

或者,您可以只在构造函数中订阅您的服务(返回Observable),然后使您的模板使用数组工作(因此,模板中不需要异步管道)。

尝试在TS中执行以下操作:

import { Component } from '@angular/core';
import { IonicPage, NavController, NavParams } from 'ionic-angular';
import { Observable } from "rxjs";
import { ResProject,ComProject,OffiProject } from "../../models/project.model";
import { AddProjectService } from "../../services/addproject.service";

@IonicPage()
@Component({
  selector: 'page-project',
  templateUrl: 'project.html',
})
export class ProjectPage {

  // holders of original unfiltered data:
  resProject : Observable <ResProject[]> ;
  comProject : Observable <ComProject[]>;

  // holders of data for filtered lists, initially set to empty array:
  filteredResProject: any[] = [];
  filteredComProject: any[] = [];

  constructor(public navCtrl: NavController,
              public navParams: NavParams,
              public projectService : AddProjectService,
              )
    {
      this.initializeItems();
    }

  filterItems(event) {
    this.initializeItems();
    const val = event.target.value;
    if (val && val.trim() != '') {
      this.filteredResProject = this.filteredResProject.filter((item) => {
        return (item.name.toLowerCase().indexOf(val.toLowerCase()) > -1);
      })
    }
  }

  initializeItems() {
    this.resProject = this.projectService.getResProjectList()
    .snapshotChanges()
    .map(
      changes => {
        return changes.map(c => ({
          key : c.payload.key, ...c.payload.val()
        }))
      }

    )
  this.resProject.subscribe( res => {
    this.filteredResProject = res;
  })

  this.comProject = this.projectService.getComProjectList()
  .snapshotChanges()
  .map(
    changes => {
      return changes.map(c => ({
        key : c.payload.key, ...c.payload.val()
      }))
    }

  )
this.comProject.subscribe( res => {
  this.filteredComProject = res;
});
  }

}


而且在您的模板中,yoo应该不再使用异步管道,因为您仅渲染基于数组的数据:

<ion-header>
    <ion-navbar>
      <button ion-button menuToggle>
        <ion-icon name="menu"></ion-icon>
      </button>
    <ion-title>Project List</ion-title>
  </ion-navbar>
  <ion-toolbar>
    <ion-searchbar (ionInput)="filterItems($event)"></ion-searchbar>
  </ion-toolbar>
</ion-header>

<ion-content >
    <ion-list>
        <ion-list-header>
        Project List
        </ion-list-header>
        <ion-badge>Number Of Residential Project :{{ resProject.length }}</ion-badge>
        <ion-item *ngFor="let rp of filteredResProject" detail-push navPush="ViewProjectPage" [navParams]="{resProject:rp} ">
        {{rp.name}}
      </ion-item>
    </ion-list>
    <ion-list>
        <ion-badge color="danger">Number Of Commercial Project :{{ comProject.length }}</ion-badge>
        <ion-item *ngFor="let cp of filteredComProject" detail-push navPush="ViewComProPage" [navParams]="{comProject:cp}">
        {{cp.name}}
      </ion-item>
    </ion-list>
</ion-content>


这不是最好的代码设计,但是根据您当前的代码,这应该可以工作。基本思想-您想从服务中获取完整的真实数据,并且在每次“初始化”时仅修改过滤后的列表。

08-17 20:11