在Ionic 2 Angular 2中输入总位数时打开一个模态怎么样？ [英] Open a modal when input a total number of digits in Ionic 2 Angular 2 how to?

问题描述

我试图在用户输入特定数字的位数时打开一个模态，但我所拥有的并不像我想要的那样，而是在点击时触发一个模态。

I am trying to open a modal when user type in a particular number of digits, but all I have does not look like what I want, instead it fires a modal upon click.

这就是我所做的：

test.html

<ion-card class="card-space">
  <ion-item>
    <ion-label stacked>Amount</ion-label> <!--I can use floating here but I prefer stacked-->
      <ion-input type="text" placeholder="Input Amount" (itemSelected)="itemClicked($event)">
      </ion-input>
  </ion-item>
</ion-card>

test.ts

import {Component} from '@angular/core';
import {ModalController, NavController, NavParams} from 'ionic-angular';
import {Http} from "@angular/http";
import {CompleteTestProvider, ISearch} from "../../providers/complete-test";
import {CustomerDetailsPage} from "../customer-details/customer-details";


@Component({
  selector: 'page-customer-issues-form',
  templateUrl: 'customer-issues-form.html',
})
export class CustomerIssuesFormPage {

  constructor(public navCtrl: NavController,
              public navParams: NavParams,
              private http: Http,
              public  completeTestProvider: CompleteTestProvider,
              private _modalCtrl: ModalController) {
  }

  ionViewDidLoad() {
    console.log('ionViewDidLoad CustomerIssuesFormPage');
  }

  itemClicked(item: ISearch) {
    console.log(item);
    //so open the modal here
    let modal = this._modalCtrl.create(CustomerDetailsPage, {customer:item});
    modal.present();
  }

}

我该如何解决这个问题？
我使用Ionic 2，Angular 2 with Typescript。

How do I go about this? Am using Ionic 2, Angular 2 with Typescript.

推荐答案

如您所说，您可以使用 ionInput 每次用户输入一个字符时执行一个函数，并将事件作为参数传递给函数，你可以得到该值并用它来比较。这样做

As commented you can use ionInput to execute a function everytime your user inputs a character and passing the event as parameter to the function you can get the value and use it to compare. Do as this

你的HTML：

<ion-card class="card-space">
  <ion-item>
    <ion-label stacked>Amount</ion-label> <!--I can use floating here but I prefer stacked-->
      <ion-input type="text" placeholder="Input Amount" (ionInput)="itemClicked($event)">
      </ion-input>
  </ion-item>
</ion-card>

您的.TS：

itemClicked(event: any) {
  // GET THE USER INPUT
  let userInput: string = event.target.value;

  // COMPARE THE LENGTH WITH THE AMOUNT YOU WANT, I'LL USE 10
  if(userInput.length == 10){
    let modal = this._modalCtrl.create(CustomerDetailsPage, {customer:item});
    modal.present(); 
  }
}

这样就可以与你想要的长度进行比较它将会打开模态。

With this it'll compare with the length you want it to be and open the modal.

希望这会有所帮助。

这篇关于在Ionic 2 Angular 2中输入总位数时打开一个模态怎么样？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！