如何使用不同的按钮弹出离子选择

Question

如何使用不同的按钮弹出离子选择？

<ion-select [(ngModel)]="choices" multiple="true">
        <ion-option>Appliances</ion-option>
        <ion-option>Automobile</ion-option>
        <ion-option>Cellphones</ion-option>
        <ion-option>Clothing</ion-option>
        <ion-option>Computers</ion-option>
        <ion-option>Electronics</ion-option>
        <ion-option>Toys</ion-option>
</ion-select>

Answer 1

您可以使用ionic-angular

ViewChild

html

<ion-select [(ngModel)]="choices" multiple="true" #mySelect>
     <ion-option>Appliances</ion-option>
     <ion-option>Automobile</ion-option>
     <ion-option>Cellphones</ion-option>
     <ion-option>Clothing</ion-option>
     <ion-option>Computers</ion-option>
     <ion-option>Electronics</ion-option>
     <ion-option>Toys</ion-option>
</ion-select>
<button ion-button (click)="openSelect()">Open</button>
<button ion-button (click)="closeSelect()">Close</button>

TS

import { Component, ViewChild } from '@angular/core';
import { NavController,Content, Select } from 'ionic-angular';
import { Events } from 'ionic-angular';
@Component({
    selector: 'page-home',
    templateUrl: 'home.html'
})
export class HomePage 
{    
    @ViewChild('mySelect') selectRef: Select;
    constructor(public navCtrl: NavController,public events: Events) 
    {}
    openSelect()
    {
        this.selectRef.open();
    }
    closeSelect()
    {
        this.selectRef.close();
    }
}

Answer 2

感谢@pareshgami

但是，在离子4中，如果仅在单击button并隐藏select

时才显示列表

1.Import IonSelect

import { Component, ViewChild } from '@angular/core';
import { Platform, Events, IonSelect } from '@ionic/angular';

2.印刷类，将引用添加到select，然后将showList设置为true thue hide select。还要添加setCountry()以检索选定的国家。

@ViewChild('countryList') selectRef: IonSelect;
showList = true;
setCountry() {
    console.log('New country');
}

3.在html，添加带有隐藏属性的 select元素

<ion-select placeholder="Country" #countryList [hidden]='showList' (ionChange)='setCountry()'>
    <ion-select-option value="1">Egypt</ion-select-option>
    <ion-select-option value="2">Kuwait</ion-select-option>
    <ion-select-option value="3">UAE</ion-select-option>
    <ion-select-option value="4">Qatar</ion-select-option>
    <ion-select-option value="5">Bahrain</ion-select-option>
    <ion-select-option value="6">Saudi Arabia</ion-select-option>
</ion-select>
<ion-label (click)='displayCountry()'>Change</ion-label>

因此，select元素是看不见的，单击Change将显示以选择的国家列表。

Answer 3

下面的代码工作。

在模板(html(中

<ion-button (click)="openSelectList()"></ion-button>
 <ion-select #countryList (ionChange)='setCountry($event)' hidden="true">
    <ion-select-option value="1">Egypt</ion-select-option>
    <ion-select-option value="2">Kuwait</ion-select-option>
</ion-select>

in .ts

@ViewChild('countryList') selectRef: IonSelect;
   ...
   openSelectionList() {
     setTimeout(()=>{
       this.selectRef.open();
     }, 2);
   }
   setCountry(event) { console.log('Selected country is ', event.detail.value) }