javascript - Angular Material 日期选择器设置为用作日期或月份
问题描述
我在我的 angular 8 应用程序中使用 angular material datepicker,想知道它是否可以用作日期选择器和月份选择器。我的意思是用户可以在同一日期选择器中选择日期/月/年或仅月/年。该文档没有提到在同一日期选择器中使用这两种变体。任何人都可以帮忙吗?这是我使用日期/月/年的代码。这也可以更改为使用月/年吗?
<mat-form-field>
<input matInput [max]="maxDate"
[matDatepicker]="picker"
[(ngModel)]="companyModel.incorporationDate"
#incorporationDate="ngModel"
incorporationDate>
<mat-datepicker-toggle matSuffix [for]="picker"></mat-datepicker-toggle>
<mat-datepicker #picker disabled="false"></mat-datepicker>
</mat-form-field>
解决方案
直接来自 Angular Material文档
<mat-form-field>
<mat-label>Month and Year</mat-label>
<input matInput [matDatepicker]="dp" [formControl]="date">
<mat-datepicker-toggle matSuffix [for]="dp"></mat-datepicker-toggle>
<mat-datepicker #dp
startView="multi-year"
(yearSelected)="chosenYearHandler($event)"
(monthSelected)="chosenMonthHandler($event, dp)"
panelClass="example-month-picker">
</mat-datepicker>
</mat-form-field>
在 TS 文件中:
import {Component} from '@angular/core';
import {FormControl} from '@angular/forms';
import {MomentDateAdapter, MAT_MOMENT_DATE_ADAPTER_OPTIONS} from '@angular/material-moment-adapter';
import {DateAdapter, MAT_DATE_FORMATS, MAT_DATE_LOCALE} from '@angular/material/core';
import {MatDatepicker} from '@angular/material/datepicker';
// Depending on whether rollup is used, moment needs to be imported differently.
// Since Moment.js doesn't have a default export, we normally need to import using the `* as`
// syntax. However, rollup creates a synthetic default module and we thus need to import it using
// the `default as` syntax.
import * as _moment from 'moment';
// tslint:disable-next-line:no-duplicate-imports
import {default as _rollupMoment, Moment} from 'moment';
const moment = _rollupMoment || _moment;
// See the Moment.js docs for the meaning of these formats:
// https://momentjs.com/docs/#/displaying/format/
export const MY_FORMATS = {
parse: {
dateInput: 'MM/YYYY',
},
display: {
dateInput: 'MM/YYYY',
monthYearLabel: 'MMM YYYY',
dateA11yLabel: 'LL',
monthYearA11yLabel: 'MMMM YYYY',
},
};
/** @title Datepicker emulating a Year and month picker */
@Component({
selector: 'datepicker-views-selection-example',
templateUrl: 'datepicker-views-selection-example.html',
styleUrls: ['datepicker-views-selection-example.css'],
providers: [
// `MomentDateAdapter` can be automatically provided by importing `MomentDateModule` in your
// application's root module. We provide it at the component level here, due to limitations of
// our example generation script.
{
provide: DateAdapter,
useClass: MomentDateAdapter,
deps: [MAT_DATE_LOCALE, MAT_MOMENT_DATE_ADAPTER_OPTIONS]
},
{provide: MAT_DATE_FORMATS, useValue: MY_FORMATS},
],
})
export class DatepickerViewsSelectionExample {
date = new FormControl(moment());
chosenYearHandler(normalizedYear: Moment) {
const ctrlValue = this.date.value;
ctrlValue.year(normalizedYear.year());
this.date.setValue(ctrlValue);
}
chosenMonthHandler(normalizedMonth: Moment, datepicker: MatDatepicker<Moment>) {
const ctrlValue = this.date.value;
ctrlValue.month(normalizedMonth.month());
this.date.setValue(ctrlValue);
datepicker.close();
}
}
在您的情况下,选择的月份处理程序可能是这样的:
chosenMonthHandler(normlizedMonth: Moment, datepicker: MatDatepicker<Moment>) {
const month = moment(normlizedMonth).month();
const date = moment(this.date.value);
const ctrlValue = new Date(date.year() , month);
this.date.patchValue(ctrlValue);
}
所以你可以有两种行为,比如月份和日期选择器。祝你好运!
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