Here you can quickly build an example for Ionic 2. If you are using Ionic 1, you should easily adapt it.
You just need to increase and decrease several functions of the controller / class, and then call those who pressed the buttons. This example covers only one button, so something like this is wrapped in ngForor<ion-list>
page.ts:
private currentNumber = 0;
constructor () { }
private increment () {
this.currentNumber++;
}
private decrement () {
this.currentNumber--;
}
page.html:
<ion-icon name="remove-circle" (click)="decrement()">
{{currentNumber}}
<ion-icon name="add-circle" (click)="increment()">
source
share