如何 select only year on mat-datepicker

Question

我正在开发一个 angular 8 的应用程序，其中我有一个仅包含年份数字的输入。我用过mat-datepicker，只想选择年份。

<mat-form-field class="input-control">
      <input matInput placeholder="{{'enter'|translate}}.." [formControl]="form.controls.openedAt"
             [matDatepicker]="date" readonly>
      <mat-datepicker-toggle matSuffix [for]="date"></mat-datepicker-toggle>
      <mat-datepicker #date startView="multi-year"></mat-datepicker>
    </mat-form-field>

此代码先显示年视图，但当我选择年时，会打开月视图，然后是天视图。

那么我怎样才能 select 只有年份，或者在 mat-datepicker 上只显示年份视图？

Answer 1

此功能尚未完全实现。你可以在这里看到：

https://github.com/angular/components/issues/4853

现在你可以试试这个：

https://stackblitz.com/edit/angular-mulitdate-picker-demo

Answer 2

I did like this:

html:
            <mat-form-field
                appearance="outline">
                <mat-label>Ano</mat-label>
                <input [(ngModel)]="selectYear" [formControl]="dateForm" matInput 
                [matDatepicker]="picker" />
                <mat-datepicker-toggle matSuffix [for]="picker" ></mat-datepicker- 
                toggle>
                <mat-datepicker 
                #picker
                startView="multi-year"
                (yearSelected)="chosenYearHandler($event, picker)"
                ></mat-datepicker>
            </mat-form-field>

component: 

export const MY_FORMATS = {
  parse: {
    dateInput: 'YYYY',
  },
  display: {
    dateInput: 'YYYY',
    monthYearLabel: 'YYYY',
    monthYearA11yLabel: 'YYYY',
  },
};

, 供应商：[ { 提供：日期适配器，使用类：MomentDateAdapter，部门：[MAT_DATE_LOCALE，MAT_MOMENT_DATE_ADAPTER_OPTIONS] },

{provide: MAT_DATE_FORMATS, useValue: MY_FORMATS},

]

     chosenYearHandler(ev, input){
          let { _d } = ev;
          this.selectYear = _d;
          input._destroyPopup()
        }

Its works well and very simple!!!

如何 select only year on mat-datepicker

How to select only year on mat-datepicker

angular-material

angular8

mat-datepicker