Ionic3学习笔记实现省市区三级联动

手机APP实现三级联动效果

1. 安装 ion-multi-picker

2. 导入 app.module.ts 

import {MultiPickerModule} from'ion-multi-picker';

imports: [

...

MultiPickerModule,

...

]

3. 创建 provider

终端运行:

ionic g provider city-data

省市区json文件下载地址:
https://raw.githubusercontent.com/raychenfj/ion-multi-picker/master/example/src/assets/chinese-cities.json

将json值赋给下面的 cities  变量即可。

city-data.ts:

import { HttpClient } from '@angular/common/http';
import { Injectable } from '@angular/core';

@Injectable()
export class CityDataProvider {
  public cities: any[];

  constructor(public http: HttpClient) {
    this.cities = 省市区json
  }
}

4. 创建 page

终端运行:

ionic g page about

about.ts

import { Component } from '@angular/core';
import { IonicPage, NavController, NavParams } from 'ionic-angular';
import {CityDataProvider} from "../../providers/city-data";
@Component({
  selector: 'page-about',
  templateUrl: 'about.html'

})
export class AboutPage {
  public session: any;
  public params: any;
  public cityColumns: any[];
  public citydefault: any;

  constructor(public navCtrl: NavController,
              public navParams: NavParams,
              public cityDataProvider: CityDataProvider,) {
    this.cityColumns = this.cityDataProvider.cities;
    this.session = window.localStorage.getItem('session');
    this.citydefault = '17 267 1768';//默认的地区id
  }
}

about.html

{{citydefault}}
  <ion-list>
    <ion-item>
      <ion-icon name="pin" item-start></ion-icon>
      <ion-label>居住地</ion-label>
      <ion-multi-picker item-content [multiPickerColumns]="cityColumns" [(ngModel)]="citydefault"  [cancelText]="'取消'" [doneText]="'完成'"></ion-multi-picker>
    </ion-item>
  </ion-list>

展示效果：

默认情况下：

参考：http://metaphors.name/coding/2017/11/26/Ionic11.html