前言
這個元件實現並不是很複雜，我會盡量註釋；
這貨誕生的理由就是專案剛好有一個地方必須只能選擇年月，而github上ng2+日期元件都涉及到年月日或時分秒；
效果用gifcam錄製的，色彩有些失真，將就吧。。動手動手出真理
效果圖
實現思路
- 月份只有十二個，只要把個位數做好補位就好
- 年份的生成是可控的(傳參)，當前年份往前推幾年和往後推幾年構成；
- 資料遍歷結構很簡單
{
date:2017, // 月份是字串，年份是數字
active:false,
type:'year' // 月份是'month'
}複製程式碼頁面樣式就自行折騰啦，我這裡只是用了最直白粗暴的下拉滑動
在ng4寫的。動畫模組需要單獨引入，可以看我的其他文章有介紹
實現程式碼
- html
<div class="only-year-month-select">
<div class="select" (click)="isExpand = !isExpand">
<input type="text" [placeholder]="placeholder" class="form-control" [(ngModel)]="selected" [disabled]="true">
</div>
<div class="list-menu" *ngIf="isExpand" [@fadeIn]="true">
<div class="sub-list1">
<p class="title">年份</p>
<ul class="year-wrap">
<li *ngFor="let i of selectYearRange;let index = index" [class.active]="i.active" (click)="actValue(selectYearRange,index)"
(dblclick)="emitResult(i)">{{i.date}}</li>
</ul>
</div>
<div class="sub-list2">
<p class="title">月份</p>
<ul class="month-wrap">
<li *ngFor="let i of selectMonthRange;let index = index" [class.active]="i.active" (click)="actValue(selectMonthRange,index)"
(dblclick)="emitResult(i)">{{i.date}}</li>
</ul>
</div>
</div>
</div>複製程式碼- components
import { Component, OnInit, Input, Output, EventEmitter, HostListener, ElementRef } from '@angular/core';
// 動畫
import { fadeIn } from '../../animation/fadeIn';
@Component({
selector: 'app-only-year-month-select',
templateUrl: './only-year-month-select.component.html',
styleUrls: ['./only-year-month-select.component.scss'],
animations: [fadeIn]
})
export class OnlyYearMonthSelectComponent implements OnInit {
@Input() public placeholder: string;
@Input() public range: any;
@Output() public result = new EventEmitter();
public isExpand = false;
public selectYear: any;
public selectMonth: any;
public selectYearRange: Array<any> = [];
public selectMonthRange: Array<any> = [];
public selected: any;
constructor(
private _el: ElementRef
) { }
ngOnInit() {
this.getCurrentDate();
}
// 獲取當前的年月
getCurrentDate(): void {
const TODAY = new Date();
this.selectYear = TODAY.getFullYear();
this.selectMonth = TODAY.getMonth() < 9 ? '0' + (TODAY.getMonth() + 1) : String(TODAY.getMonth() + 1);
this.selectYearRange.push(
{
date: this.selectYear,
active: true,
type: 'year'
}
);
this.selectMonthRange.push(
{
date: this.selectMonth,
active: true,
type: 'month'
}
);
this.selectYearRange = this.getRangeYear(this.selectYear, this.range.before, this.range.after);
this.selectMonthRange = this.getRangeMonth(this.selectMonth);
console.log(this.selectYearRange, this.selectMonthRange);
}
// 需要生成的日期範圍
getRangeYear(year: number, before: number = 5, after: number = 10): any {
// console.log(year, before, after);
let _beforeYear = year;
let _afterYear = year;
for (let i = 0; i < before; i++) {
this.selectYearRange.unshift(
{
date: --_beforeYear,
active: false,
type: 'year'
}
);
}
for (let j = 0; j < after; j++) {
this.selectYearRange.push(
{
date: ++_afterYear,
active: false,
type: 'year'
}
);
}
return this.selectYearRange;
}
// 月份範圍
getRangeMonth(month): any {
for (let i = 0; i < 12; i++) {
const temp = i < 9 ? '0' + (i + 1) : '' + (i + 1);
if (month !== temp) {
this.selectMonthRange.push(
{
date: temp,
active: false,
type: 'month'
});
}
}
this.selectMonthRange.sort(this.compare('date'));
return this.selectMonthRange;
}
// 陣列物件排序
compare(property) {
return function (a, b) {
const value1 = a[property];
const value2 = b[property];
return value1 - value2;
};
}
// 年份或者月份選擇
actValue(list: any, index: number) {
list.forEach((v, i) => {
if (i === index) {
v.active = true;
if (v.type === 'year') {
console.log(v.date);
this.selectYear = v.date;
}
if (v.type === 'month') {
console.log(v.date);
this.selectMonth = v.date;
}
} else {
v.active = false;
}
});
this.emitResult();
}
// 獲取結果集
emitResult(e?: any) {
if (e) { // 雙擊則關閉彈出
this.isExpand = false;
}
this.selected = this.selectYear + '-' + this.selectMonth;
this.result.emit(this.selected);
}
// 監聽全域性點選事件
@HostListener('document:click', ['$event.target'])
public onClick(targetElement) {
const clickedInside = this._el.nativeElement.contains(targetElement);
if (!clickedInside) {
this.isExpand = false;
this.emitResult();
}
}
}複製程式碼- fadeIn.ts
// 動畫的效果很簡單，就是把css3的效果用js來實現，具體的效果就是漸現
// 放在突然出來一塊區域的地方，觸發看起來會比較順眼，有個過渡
import { trigger, state, style, transition, animate, keyframes } from '@angular/animations';
//transition(':enter', [ ... ]); // void => *
//transition(':leave', [ ... ]); // * => void
export const fadeIn = trigger('fadeIn', [
state('in', style({ display: 'none' })),
transition('void => *', [
animate(200, keyframes([
style({ height: '0', opacity: 0, offset: 0 }),
style({ height: '*', opacity: 1, offset: 1 })
]))
]),
transition('* => void', [
animate(200, keyframes([
style({ height: '*', opacity: 1, offset: 0 }),
style({ height: '0', opacity: 0, offset: 1 })
]))
]),
]);
// 200 是過渡時間，毫秒
// offset相當於 css3 中keyframes的百分比，，控制動畫的進度的。。0 -> 1 就相當於 0% -> 100%複製程式碼- 封裝成一個模組給其他使用
import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { FormsModule } from '@angular/forms';
import { OnlyYearMonthSelectComponent } from './only-year-month-select.component';
@NgModule({
imports: [
CommonModule, // 用用到一些內建的指令必須依賴這個，比如*ngIF, *ngFor
FormsModule // 有用到表單元素必須引入這貨
],
declarations: [OnlyYearMonthSelectComponent], // 宣告年月元件
exports: [OnlyYearMonthSelectComponent] // 匯出年月元件
})
export class OnlyYearMonthSelectModule { }複製程式碼元件使用
溫馨提示：
- 若不是以模組的方式到處，只要在使用的模組引入元件宣告下就能使用
- 反之則需要引入這個模組，方可使用
區域性程式碼
- module
// 在要使用的模組中引入
// 公用元件
import { MitEhartsModule } from '../../../widgets/mit-echarts/mit-echarts.module';
import { MitDataTableModule } from '../../../widgets/mit-data-table/mit-data-table.module';
import { MitLoadingModule } from '../../../widgets/mit-loading/mit-loading.module';
import { OnlyYearMonthSelectModule } from '../../../share/only-year-month-select/only-year-month-select.module';
import { DepartmentSelectModule } from '../../../share/department-select/department-select.module';
const mitModule = [
MitEhartsModule,
MitDataTableModule,
MitLoadingModule,
DepartmentSelectModule,
OnlyYearMonthSelectModule
]
@NgModule({
imports: [
CommonModule,
FormsModule,
NgbDatepickerModule,
...mitModule,
DailyCarRoutes
],
providers: [DailyCarService],
declarations: [...page]
}複製程式碼- html
<div class="form-group condition-wrapper">
<label class="form-control-label">月份</label>
<app-only-year-month-select class="form-control" [placeholder]="'yyyy-mm'" (result)="Time = $event" [range]="{before:5,after:10}"></app-only-year-month-select>
</div>複製程式碼總結
文章有錯誤之處亦或者有更好寫法和建議的請留言指出，會及時改進和跟進...；
下一篇文章說下指令或者動畫相關的。。。。整理下思路
