angular - Prevent duplicate Toast messages in Ionic

Question

I have implemented toast using ToastController in my ionic2 project . Currently i am facing an issue with the duplicate toast messages . Is there any way to prevent the duplication / overlapping of toast message in ionic2 / angular2

(NB : Duplication means when I click on a button I am displaying a toast , if I click on the same button multiple times the toast messages overlaps ) ?

code

export class <className>{
   constructor(private toast:ToastController){
   }
    showToast(message) {
    let toast = this.toastCtrl.create({
        message: message,
        duration: 2000,
        position: 'bottom'
    })
    toast.present();
   }
}

I am calling this method on an button click .

Edited

1. with duplicates toast (taken example using toastr , same sitaution is for me)

2. when i enable "prevent notification" , the duplicate toast are not there within the timeout duration .

Any help is much appreciated.

Answer 1

您可以使用该页面上的属性在显示新的 toast 之前了解是否正在显示 toast。

离子 2/3

import { ToastController, Toast } from 'ionic-angular';

// ...

private isToastVisible: boolean;

constructor(private toastCtrl: ToastController) { }

presentToast() {
  if(this.isToastVisible) {
    return;
  }

  this.isToastVisible = true;

  const toast: Toast = this.toastCtrl.create({
    message: 'User was added successfully',
    duration: 3000,
    position: 'top'
  });

  toast.onDidDismiss(() => {
    this.isToastVisible = false;
  });

  toast.present();
}

离子 4/5

import { ToastController } from '@ionic/angular';

// ...

private isToastVisible: boolean;

constructor(private toastCtrl: ToastController) { }

presentToast() {
  if(this.isToastVisible) {
    return;
  }

  this.isToastVisible = true;

  this.toastCtrl.create({
    message: 'User was added successfully',
    duration: 3000,
    position: 'top'
  }).then((toast: HTMLIonToastElement) => {

    toast.onDidDismiss().then(() => {
      this.isToastVisible = false;
    });

    toast.present();
  })      
}

Answer 2

我在我的 toastr.js 文件中设置preventDuplicates为 1，请参见下文；

function p() {
    return {
        tapToDismiss: !0,
        toastClass: "toast",
        containerId: "toast-container",
        debug: !1,
        showMethod: "fadeIn",
        showDuration: 300,
        showEasing: "swing",
        onShown: void 0,
        hideMethod: "fadeOut",
        hideDuration: 1e3,
        hideEasing: "swing",
        onHidden: void 0,
        closeMethod: !1,
        closeDuration: !1,
        closeEasing: !1,
        closeOnHover: !0,
        extendedTimeOut: 1e3,
        iconClasses: {
            error: "toast-error",
            info: "toast-info",
            success: "toast-success",
            warning: "toast-warning"
        },
        iconClass: "toast-info",
        positionClass: "toast-top-right",
        timeOut: 2e3,
        titleClass: "toast-title",
        messageClass: "toast-message",
        escapeHtml: !1,
        target: "body",
        // closeButton: true,
        closeHtml: '<button type="button">&times;</button>',
        closeClass: "toast-close-button",
        newestOnTop: !0,
        preventDuplicates: 1,
        progressBar: 1,
        progressClass: "toast-progress",
        rtl: !1
    }
}