📜  角材料7-排序标题

📅  最后修改于: 2020-10-28 04:54:54             🧑  作者: Mango


matSort (一个角度指令),用于向表头添加排序功能。

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);
}

结果

验证结果。

排序标题

细节

  • 在这里,我们创建了一个表格。添加了matSort并处理其matSortChange事件。