新建toast.service文件进行方法封装

1、新建文件命令

ionic g service service/toast

2、toast.service完整代码

import { Injectable } from '@angular/core';
import {ToastController} from "@ionic/angular";

@Injectable({
  providedIn: 'root'
})
export class ToastService {
                    //构造方法注入ToastController
    constructor(private toastController: ToastController) { }
    
    //成功提示信息
    public async showSuccessToast(msg:string){
        const toast = await this.toastController.create({
            message: msg,
            duration: 4000,  //持续出现的时间(毫秒)
            color:"success",
            position:"middle"  //在窗口的显示位置
        });
        toast.present();
    }


    //警告提示信息
    public async showWarningToast(msg:string){
        const toast = await this.toastController.create({
            message: msg,
            duration: 4000,  //持续出现的时间(毫秒)
            color:"warning",
            position:"middle"  //在窗口的显示位置
        });
        toast.present();
    }

    //警错误提示信息
    public async showErrrorToast(msg:string){
        const toast = await this.toastController.create({
            message: msg,
            duration: 4000,  //持续出现的时间(毫秒)
            color:"danger",
            position:"middle"  //在窗口的显示位置
        });
        toast.present();
    }
}

3、在需要的地方引用

• 构造方法constructor()中引入

,private toastController: ToastController
,private toastservice:ToastService

• 具体实现方法加入

this.toastservice.showSuccessToast("成功信息");
this.toastservice.showErrrorToast("错误信息");
this.toastservice.showWarningToast("警告信息");

4、举个栗子：

• 逻辑部分代码(ts文件)

presentToastByService1(){
        this.toastservice.showSuccessToast("成功");
    }
    presentToastByService2(){
        this.toastservice.showErrrorToast("错误");
    }
    presentToastByService3(){
        this.toastservice.showWarningToast("警告");
    }

• HTML部分代码

<ion-button (click)="presentToastByService1()">成功信息测试</ion-button>
<ion-button (click)="presentToastByService2()">错误信息测试</ion-button>
<ion-button (click)="presentToastByService3()">警告信息测试</ion-button>

5、演示效果