我使用的是MAC OS 10.13

ionic info

cli packages: (/usr/local/lib/node_modules)

    @ionic/cli-utils  : 1.19.2
    ionic (Ionic CLI) : 3.20.0

global packages:

    cordova (Cordova CLI) : 8.0.0 

local packages:

    @ionic/app-scripts : 3.1.8
    Cordova Platforms  : android 6.3.0
    Ionic Framework    : ionic-angular 3.9.2

System:

    Node : v8.11.0
    npm  : 5.6.0 
    OS   : macOS High Sierra

Environment Variables:

    ANDROID_HOME : not set

Misc:

    backend : pro

authphone.html

<ion-header>
    <ion-navbar>
        <ion-title>authphone</ion-title>
    </ion-navbar>
</ion-header>
<ion-content text-center overflow-scroll="false">
    <ion-row>
        <ion-card>
            <ion-card-content>
                <ion-row>
                    <ion-item>
                        <ion-label color="primary" stacked>country</ion-label>
                        <ion-select class="selectwidth" [(ngModel)]="selectedCountry">
                            <ion-option *ngFor="let country of countries">{{country.name}}</ion-option>
                        </ion-select>
                    </ion-item>
                    <ion-item>
                        <ion-label color="primary" stacked>phone</ion-label>
                        <ion-input class="center-button" type="text" [(ngModel)]='phone' placeholder="except -" autofocus></ion-input>
                    </ion-item>
                </ion-row>
            </ion-card-content>
        <ion-row>

config.xml add this

<preference name="KeyboardDisplayRequiresUserAction" value="false" />

AuthphonePage.ts

@IonicPage()
@Component({
    selector: 'page-authphone',
    templateUrl: 'authphone.html',
})
export class AuthphonePage {
    username:string;
    phone:string;
    constructor(public navCtrl: NavController, public navParams: NavParams,private http:HttpClient,private fcm: FCM) {
        this.username = navParams.get('username');
    }
    ionViewDidLoad() {
        console.log('ionViewDidLoad AuthphonePage');
    }

运行此代码首次聚焦离子输入并显示键盘

但它瞬间隐藏和集中注意力 .

如何保持焦点和键盘？

我想将离子卡含量或离子含量设置为垂直中心怎么样？

请帮助

ionic-framework