📅  最后修改于: 2020-10-28 04:54:54             🧑  作者: Mango
在本章中,我们将展示使用Angular Material显示排序标题所需的配置。
以下是修改后的模块描述符app.module.ts的内容。
import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import {BrowserAnimationsModule} from '@angular/platform-browser/animations';
import {MatSortModule} from '@angular/material'
import {FormsModule, ReactiveFormsModule} from '@angular/forms';
@NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule,
BrowserAnimationsModule,
MatSortModule,
FormsModule,
ReactiveFormsModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
以下是修改后的HTML主机文件app.component.html的内容。
Dessert (100g)
Calories
Fat (g)
Carbs (g)
Protein (g)
{{food.name}}
{{food.calories}}
{{food.fat}}
{{food.carbs}}
{{food.protein}}
以下是修改后的ts文件app.component.ts的内容。
import {Component, Injectable} from '@angular/core';
import {Sort} from '@angular/material';
export interface Food {
calories: number;
carbs: number;
fat: number;
name: string;
protein: number;
}
@Component({
selector: 'app-root',
templateUrl: 'app.component.html',
styleUrls: ['app.component.css']
})
export class AppComponent {
foods: Food[] = [
{name: 'Yogurt', calories: 159, fat: 6, carbs: 24, protein: 4},
{name: 'Sandwich', calories: 237, fat: 9, carbs: 37, protein: 4},
{name: 'Eclairs', calories: 262, fat: 16, carbs: 24, protein: 6},
{name: 'Cupcakes', calories: 305, fat: 4, carbs: 67, protein: 4},
{name: 'Gingerbreads', calories: 356, fat: 16, carbs: 49, protein: 4},
];
sortedFood: Food[];
constructor() {
this.sortedFood = this.foods.slice();
}
sortFood(sort: Sort) {
const data = this.foods.slice();
if (!sort.active || sort.direction === '') {
this.sortedFood = data;
return;
}
this.sortedFood = data.sort((a, b) => {
const isAsc = sort.direction === 'asc';
switch (sort.active) {
case 'name': return compare(a.name, b.name, isAsc);
case 'calories': return compare(a.calories, b.calories, isAsc);
case 'fat': return compare(a.fat, b.fat, isAsc);
case 'carbs': return compare(a.carbs, b.carbs, isAsc);
case 'protein': return compare(a.protein, b.protein, isAsc);
default: return 0;
}
});
}
}
function compare(a: number | string, b: number | string, isAsc: boolean) {
return (a < b ? -1 : 1) * (isAsc ? 1 : -1);
}
验证结果。