Pass ion-select-option to function - Ionic 4

问题

I have this Ionic version 4 code that is simply trying to take a the selected value and pass it to a function in it's component:

<ion-item>
<ion-label>Convert Currency</ion-label>
<ion-select [(ngModel)]="currency">
<ion-select-option *ngFor="let c of currencyData" [value] = "c" >{{c.text}}</ion-select-option>
</ion-select>

I tried onChange but that is apparently not in version 4.

回答1:

You are looking for ionChange

  <ion-select [(ngModel)]="currency" (ionChange)="yourFunction($event)">

回答2:

you can use ionChange to pass the selected value as follow :

     <ion-select (ionChange)="checkValue($event)"  interface="popover" 
      placeholder="Select One" >
        <ion-select-option *ngFor="let c of currencyData" [value]="c"> 
       {{c.text}}</ion-select-option>
 </ion-select>

In your typeScript:

checkValue(event){ console.log(event.detail.value)}

来源：https://stackoverflow.com/questions/53551889/pass-ion-select-option-to-function-ionic-4