Angular 2 + Ionic 2：如何更改控制器中的日期格式？

Question

我正在从 sqlite 数据库循环获取日期。格式类似于 "Wed Feb 01 2017 21:54:24 GMT-0200"。但我想将其更改为 'dd/MM/yyyy'。

如何在控制器中更改格式？

例如我的代码：

this.issuedService.fetchAll().then(( res ) => {
    var data = [];
    for (let entry  of <Array<any>>res) {                
        console.log( JSON.stringify( entry  ) );
    }            
    //this.items = <Array<any>>res;
}, ( error ) => {
    console.log( "ERROR: ", error.message );
});

更新 2017-02-02

于是，几个小时没睡觉，我终于找到了解决办法。

我可以从 NPM 将 MomentJs 库添加到我的 Ionic v2 项目中。

$ npm install moment --save

结果代码：

import { Component } from '@angular/core';

import { NavController, NavParams } from 'ionic-angular';

import * as moment from 'moment';
import 'moment/locale/pt-br';

import { IssuedService } from '../../providers/issued-service';

@Component( {
    selector: 'page-home',
    templateUrl: 'home.html'
})

export class HomePage {
    items: any[] = [];
    issuedPage = IssuedPage;

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

    ionViewDidLoad() {
        console.log( 'ionViewDidLoad HomePage' );
    }

    initializeItems() {
        this.issuedService.fetchAll().then(( res ) => {
            for ( let entry of <Array<any>>res ) {
                entry.query_dt = moment( entry.picking_dt ).format( 'DD MMMM YYYY' );
                this.items.push(entry);
            }
            console.log( JSON.stringify( this.items  ) );
        }, ( error ) => {
            console.log( "ERROR: ", error.message );
        });
    }
}

Ionic 2 Doc / Adding third party libs

Answer 1

试试这个

$scope.date = 'Wed Feb 01 2017 21:54:24 GMT-0200';
  var filterdatetime = $filter('date')( $scope.date,'dd/MM/yyyy' );
  alert(filterdatetime);

Answer 2

我项目的解决方案：

Adding third party libs

You can add most third party libraries to your V2 project from NPM. For example let’s add MomentJs.

 $ npm install moment --save

From here, we can import it into what ever class we want to use it in.

import {Page} from 'ionic-angular';
import * as moment from 'moment';

export class MyClass {
  constructor(){
    moment("20111031", "YYYYMMDD").fromNow();
  }

}

Ionic Documentation Code

Answer 3

我用两行做到了：

import { DatePipe } from '@angular/common';

<ion-label>{{myDate | date: 'yyyy'}}</ion-label>

第一个只是 ts 文件中的导入，第二个是您放入 html 文件中。

Angular 2 + Ionic 2：如何更改控制器中的日期格式？

Angular 2 + Ionic 2: how to change the date format in controller?

sqlite

angularjs

ionic2

typescript2.0

angular